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recommend that you always place a child in a rear-facing child restraint on the rear seat.
RIf you install a rear-facing child restraint on
the front-passenger seat, make sure the 45 indicator lamp is illuminated, indicating that the front-passenger front air bag is deactivated. Should the 45
indicator lamp not illuminate or go out while the restraint is installed, please check installation. Periodically check the 45 indicator lamp while driving to make sure that the 45 indicator lamp is illuminated. If the 45
indicator lamp goes out or remains out, doOccupant safety
49
not transport a child on the front-passenger seat until the system has been repaired. A child in a rear-facing child restraint on the front-passenger seat will be seriously injured or even killed if the front-passenger front air bag inflates.
RIf you place a child in a forward-facing child
restraint on the front-passenger seat: - move the seat as far back as possible - use the proper child restraint
recommended for the age, size and weight of the child
- secure child restraint with the vehicle's
seat belt according to the child seat manufacturer's instructions
RFor children larger than the typical 12-
month-old child, the front-passenger front air bag may or may not be activated. G WARNING If the red 6 SRS warning lamp in the instrument cluster and the 45
indicator lamp light up simultaneously, the OCS is malfunctioning. The front passenger front air bag will be deactivated in this case. Have the system checked by qualified technicians as soon as possible. Contact an authorized Mercedes-Benz Center. Only have the seat repaired or replaced at an authorized Mercedes-Benz Center. In order to ensure proper operation of the air bag system and OCS: RSit with the seat belt properly fastened in a position that is as upright as possible with your back against the seat backrest. RWhen seated, a passenger should notposition him/herself in such a way as to cause the passenger's weight to be lifted from the seat cushion as this may result in the OCS being unable to correctly approximate the passenger's weight category.
RRead and observe all warnings in this
chapter.
50 Occupant safety
If the SmartKey has been removed from the ignition lock or is in position 0, the 45 indicator lamp : does not light up. The Occupant Classification System (OCS) categorizes the occupant on the front- passenger seat using a weight sensor. The front-passenger front air bag is deactivated automatically for certain weight categories. 45 indicator lamp : shows you the current status. If 45 indicator lamp : lights up, the front-passenger air bag is disabled. The system does not deactivate: Rthe side impact air bag Rthe pelvis air bag Rthe window curtain air bag Rthe Emergency Tensioning Devices To be classified correctly, the front passenger must sit: Rwith the seat belt fastened correctly Rin a position that is as upright as possible with their back against the seat backrest
Rwith their feet on the floor The OCS weight sensor reading is affected if the occupant's weight is transferred, e.g. by leaning on the armrest. If the front-passenger seat, the seat cover or the seat cushion are damaged, have the necessary repair work carried out at a qualified specialist workshop. For safety reasons, Mercedes-Benz recommends that you only use seat
accessories that have been approved by Mercedes-Benz. Both the driver and the front passenger should always observe the 45
indicator lamp to determine whether or not the front passenger is positioned correctly. Also observe the air bag display messages, which appear in the instrument cluster (Y page 253). If the driver's air bag deploys, this does not mean that the front-passenger front air bag will also deploy. The OCS may have detected that the seat: Ris empty or occupied by the weight of atypical child up to twelve months old, seated in a child restraint system
Ris occupied by a small individual, such as a
young teenager or a small adult
Ris occupied by a child in a child restraint system whose weight is greater than that of a typical twelve month old child. These are examples of when the OCS deactivates the front-passenger front air bag. Deactivation takes place although the collision fulfills the criteria for deploying the driver's air bag. For further information, see "Air bag display messages" (Y page 253).
System self-test G WARNING If the 4 5 indicator lamp does not illuminate, the system is not functioning. You must contact an authorized Mercedes-Benz Center before seating any child on the front passenger seat. G WARNING Never place anything between seat cushion and child seat (e.g. a pillow), since it reduces the effectiveness of the OCS. The underside and rear side child restraint system must be placed entirely on the seat cushion and the
backrest of the front-passenger seat backrest. If necessary, adjust the tilt of the passenger seat backrest. An incorrectly mounted child seat could cause injuries to the child in case of an accident, instead of increasing protection for the child. Follow the manufacturer's instructions for installation of child restraint systems.
The 45 indicator lamp lights up: Rif you turn the SmartKey in the ignition lock
to position 1 or 2
Rif you press the KEYLESS-GO Start/Stop
button once or twice on vehicles with KEYLESS-GO
Rif an adult is seated properly on the front- passenger seat and the OCS classifies the occupant as an adult The 45 indicator lamp goes out after approximately six seconds. If the seat is not occupied and the OCS detects that the front-passenger seat is empty, the 45 indicator lamp will continue to light up. The 45 front- passenger front air bag warning lamp then stays lit continuously.
For more information about the OCS, see "Problems with the Occupant Classification System" (Y page 52).
Occupant safety
51
52 Occupant safety
Problems with the Occupant Classification System G WARNING If the 45 indicator lamp illuminates and remains illuminated when the weight of a typical adult or someone larger than a small individual has been detected on the passenger seat, do not allow any occupant to use the passenger seat until the system has been repaired. G WARNING If the 45 indicator lamp does not illuminate or remains out with the weight of a typical 12-month-old child in a standard child restraint or less, or is unoccupied, on the front-passenger seat, do not transport a child on the front-passenger seat until the system has been repaired.
Problem The 45
indicator lamp lights up and stays on. The person on the front-passenger seat: Rhas the weight of atypical adult
Rhas been determined by the system not to be a child
Problem The 45
indicator lamp does not light up and/or does not stay on. The front-passenger seat is: Runoccupied Roccupied with aweight up to that of a typical twelve- month-old child in a standard child restraint system
Possible causes/consequences and M Solutions The OCS is malfunctioning. X Have the OCS checked as soon as possible at a qualified
specialist workshop.
X Observe the additional display messages in the multifunction
display (Y page 253).
Possible causes/consequences and M Solutions The OCS is malfunctioning. X Make sure there is nothing between the seat cushion and the
child seat.
X Check the installation of the child restraint system. X Make sure that no objects are applying additional weight onto
the seat.
X If the 45 indicator lamp remains off, have the OCS
checked as soon as possible at a qualified specialist workshop. Do not transport a child on the front-passenger seat as long as the OCS is not functioning.
X Observe the additional display messages in the multifunction
display (Y page 253).
NECK-PRO head restraints/NECK- PRO luxury head restraints Important safety notes G WARNING Do not attach any objects (e.g. a coat hanger) to the NECK-PRO head restraints/NECK-PRO luxury head restraints. Otherwise, the NECK- PRO head restraints/NECK-PRO luxury head restraints may not function properly and in the event of a rear-end collision may not offer the protection they are designed to provide. G WARNING Seat or head restraint covers can cause a malfunction when the NECK-PRO head restraints/NECK PRO luxury head restraints are activated or when the side impact air bags or pelvis air bags are deployed, or they can prevent this completely. The NECK-PRO head restraints/NECK PRO luxury head restraints or side impact air bags/pelvis air bags can therefore not provide the intended protection. Do not use any seat or head restraint covers. G WARNING For your protection, drive only with properly positioned head restraints. Adjust the head restraint so that it is as close to the head as possible and the center of the head restraint supports the back of the head at eye level. This will reduce the potential for injury to the head and neck in the event of an accident or similar situation. G WARNING For reasons of safety, have the NECK-PRO head restraints/NECK-PRO luxury head restraints checked at an authorized Mercedes-Benz Center after a rear-end collision.
NECK-PRO head restraints/NECK-PRO luxury head restraints increase protection of the driver's and front-passenger's head and neck. In the event of a rear collision of a
Occupant safety
53
certain severity, the NECK-PRO head restraints/NECK-PRO luxury head restraints on the driver's and front-passenger seats are moved forwards and upwards. This provides better head support. If the NECK-PRO head restraints/NECK-PRO luxury head restraints have been triggered in an accident, reset the NECK-PRO head restraints/NECK-PRO luxury head restraints on the driver's and front-passenger seats (Y page 54). Otherwise, the additional protection will not be available in the event of another rear-end collision. NECK-PRO head restraints/NECK-PRO luxury head restraints that have been triggered are moved forwards and can no longer be adjusted.
Resetting triggered NECK-PRO head restraints/NECK-PRO luxury head restraints NECK-PRO head restraints G WARNING When pushing back the NECK-PRO head restraint cushion, make sure your fingers do not become caught between the head restraint cushion and the cover. Failure to observe this could result in injuries.
NECK-PRO head restraints (example: Sedan) X Tilt the top of the NECK-PRO head restraint
cushion forwards in the direction of arrow :.
X Push the NECK-PRO head restraint cushion down in the direction of arrow ; as far as it will go.
54 Occupant safety
X Firmly push the NECK-PRO head restraint cushion back in the direction of arrow = until the cushion engages.
X Repeat this procedure for the second
NECK-PRO head restraint.
i Resetting the NECK-PRO head restraints
requires a lot of strength. If you have difficulty resetting the NECK-PRO head restraints, have this work carried out at a qualified specialist workshop.
NECK-PRO luxury head restraints
NECK-PRO luxury head restraints X Remove resetting tool : from the vehicle
document wallet.
X Slide resetting tool : into guide ; between the NECK-PRO luxury head restraint and the rear cover of the head restraint.
X Push resetting tool : downwards until you
hear the head restraint deployment mechanism engage.
X Pull out resetting tool :. X Firmly press the NECK-PRO luxury head
restraint cushion back = until it engages.
X Repeat this procedure for the second
NECK-PRO luxury head restraint.
X Put resetting tool : back into the vehicle
document wallet.
i If you have difficulty resetting the NECK- PRO luxury head restraints, have this work carried out at a qualified specialist workshop.
PRE-SAFE® system G WARNING The PRE-SAFE® system reduces the impact of an accident on vehicle occupants, as long as their seat belts have been fastened correctly. Although your vehicle is equipped with a PRE- SAFE® system, the possibility of injury in the event of an accident cannot be ruled out. You should therefore always drive carefully and adapt your driving style to the prevailing road, weather and traffic conditions. G WARNING Make sure that nobody can become trapped as you adjust the seat.
! Make sure that there are no objects in the footwell or behind the seats when resetting the seats. There is a risk that the seats and/or the objects could be damaged. PRE-SAFE® takes preemptive measures to protect occupants in certain hazardous situations. PRE-SAFE® intervenes: Rif BAS intervenes, e.g. in emergency
braking situations
Rif, on vehicles with DISTRONIC PLUS, BAS
PLUS intervenes powerfully
Rif, on vehicles with DISTRONIC PLUS, the radar sensor system detects an imminent danger of collision in certain situations Rin critical driving situations, e.g. when physical limits are exceeded and the vehicle understeers or oversteers severely
PRE-SAFE® takes the following measures depending on the hazardous situation detected: Rthe front seat belts are pre-tensioned. Rthe front-passenger seat is adjusted if it is
in an unfavorable position.
Rthe air pressure in the side bolsters of the seat cushion and seat backrest of the front active multicontour seats is increased. Rif the vehicle skids, the sliding sunroof/
panorama roof with power tilt/sliding panel and the side windows are closed so that only a small gap remains.
If the hazardous situation passes without resulting in an accident, PRE-SAFE® slackens the belt pretensioning. The air pressure in the side bolsters of the active multicontour seat is reduced again. All settings made by PRE- SAFE® can then be reversed. If the seat belts are not released: X Move the backrest or seat back slightly, but
only when the vehicle is stationary. The belt pretensioning is reduced and the locking mechanism is released.
More information about seat belt adjustment, a convenience function integrated into PRE- SAFE®, can be found under "Seat belt adjustment" (Y page 58).
Seat belts Important safety notes G WARNING Always fasten your seat belt before driving off. Always make sure all of your passengers are properly restrained. You and your passengers should always wear seat belts. Failure to wear and properly fasten and position your seat belt greatly increases your risk of injuries and their likely severity in an accident. If you are ever in an accident, your injuries can be considerably more severe without your seat belt properly buckled. Without your seat belt buckled, you are much more likely to hit the interior of the vehicle or be ejected from it. You can be seriously injured or killed. In the same crash, the possibility of injury or death is lessened if you are properly wearing your seat belt. The air bags can only protect
Occupant safety
55
as intended if the occupants are properly wearing their seat belts. G WARNING Never ride in a moving vehicle with the seat backrest in an excessively reclined position as this can be dangerous. You could slide under the seat belt in a collision. If you slide under it, the seat belt would apply force at the abdomen or neck. That could cause serious or even fatal injuries. The seat backrest and seat belt provide the best restraint when the wearer is in a position that is as upright as possible and the seat belt is properly positioned on the body. G WARNING Never let more people ride in the vehicle than there are seat belts available. Make sure everyone riding in the vehicle is correctly restrained with a separate seat belt. Never use a seat belt for more than one person at a time. G WARNING Always have damaged seat belts or seat belts that have been subjected to a load in an accident replaced and the anchorages checked. Only use seat belts that have been approved by Mercedes-Benz. Never tamper with seat belts. This can result in the unintended deployment of the Emergency Tensioning Devices or the failure to deploy when necessary. Do not bleach or dye seat belts, as this may severely weaken them. In the event of a collision, they may be unable to provide adequate protection. Have all work carried out only by qualified technicians. Consult a qualified specialist workshop.
56 Occupant safety
The use of seat belts and infant and child restraint systems is required by law in: Rall 50 states RU.S. territories Rthe District of Columbia Rall Canadian provinces Even where this is not required by law, all vehicle occupants should correctly fasten their seat belts before starting the journey. i See "Children in the vehicle"
(Y page 60) for further information on infants and children traveling in the vehicle as well as on child restraint systems.
Correct use of the seat belts G WARNING USE SEAT BELTS PROPERLY RSeat belts can only work when used
properly. Never wear seat belts in any other way than as described in this section, as that could result in serious injuries in the event of an accident.
REach occupant should wear their seat belt at all times, because seat belts help reduce the likelihood of and potential severity of injuries in accidents, including rollovers. The integrated restraint system includes SRS (driver front air bag, driver's side knee bag, front-passenger front air bag, side impact air bags, pelvis air bags, window curtain air bags for the side windows), Emergency Tensioning Devices, seat belt force limiters, and front seat knee bolsters. The system is designed to enhance the protection offered to properly belted occupants in certain frontal (front air bags, driver's side knee bag and ETDs) and side (side impact air bags, window curtain air bags, and ETDs) impacts which exceed preset deployment thresholds and in certain rollovers (window curtain air bags and ETDs).
RNever wear the shoulder belt under your
arm, across your neck or off your shoulder.
In a frontal crash, your body would move too far forward. That would increase the chance of head and neck injuries. The seat belt would also apply too much force to the ribs or abdomen, which could severely injure internal organs such as your liver or spleen. Adjust the seat belt so that the shoulder section is located as close as possible to the middle of the shoulder. It should not touch the neck. Never pass the shoulder portion of the seat belt under your arm. For this purpose, you can adjust the height of the seat belt outlet.
RPosition the lap belt as low as possible on your hips and not across the abdomen. If the lap belt is positioned across your abdomen, it could cause serious injuries in a crash.
RNever wear seat belts over rigid or
breakable objects in or on your clothing, such as eyeglasses, pens, keys etc., as these might cause injuries.
RMake sure the seat belt is always fitted snugly. Take special care of this when wearing loose clothing.
RNever use a seat belt for more than one
person at a time. Do not fasten a seat belt around a person and another person or other objects at the same time.
RSeat belts should not be worn twisted. In a crash, you would not have the full width of the seat belt to distribute impact forces. The twisted seat belt against your body could cause injuries.
RPregnant women should also always use a
lap-shoulder belt. The lap belt portion should be positioned as low as possible on the hips to avoid any possible pressure on the abdomen.
RPlace the seat backrest in a position that is
as upright as possible.
RCheck your seat belt during travel to make
sure it is properly positioned.
RNever place your feet on the instrument panel, dashboard, or on the seat. Always keep both feet on the floor in front of the seat.
RWhen using a seat belt to secure infant
restraints, toddler restraints, or children in booster seats, always follow the child seat manufacturer's instructions. G WARNING Do not pass seat belts over sharp edges. They could tear. Do not allow the seat belt to get caught in the door or in the seat adjustment mechanism. This could damage the seat belt. Never attempt to make modifications to seat belts. This could impair the effectiveness of the seat belts.
Fastening seat belts G WARNING According to accident statistics, children are safer when properly restrained on the rear seats than on the front-passenger seat. Thus, we strongly recommend that children be placed in the rear seat whenever possible. Regardless of seating position, children 12
years old and under must be seated and properly secured in an appropriately sized child restraint system or booster seat recommended for the size and weight of the child. For additional information, see the "Children in the vehicle" section. A child's risk of serious or fatal injuries is significantly increased if the child restraints are not properly secured in the vehicle and/ or the child is not properly secured in the child restraint.Occupant safety
57
Example: Sedan X Adjust the seat and move the backrest to an almost vertical position (Y page 102). X Pull the seat belt smoothly through belt
sash guide :.
X Without twisting it, guide the shoulder
section of the seat belt across the middle of your shoulder and the lap section across your pelvis.
X Engage belt tongue ; in buckle =.
Seat-belt adjustment: if necessary, the driver's and front-passenger seat belts automatically adjust to the upper body (Y page 58).
X If necessary, adjust the seat belt to the
appropriate height (Y page 58).
X If necessary, pull upwards on the shoulder section of the seat belt to tighten the belt across your body.
All seat belts except the driver's seat belt are equipped with a special seat belt retractor to securely fasten child restraint systems in the vehicle. Further information can be found under "Special seat belt retractor" (Y page 63). For more information about releasing the seat belt with release button ?, see "Releasing seat belts" (Y page 58).
X To raise: slide the belt sash guide upwards.
The belt sash guide engages in various positions.
X To lower: press and hold belt sash guide
release :.
X Slide the belt sash guide downwards. X Release belt sash guide release : and make sure that the belt sash guide has engaged.
Using the rear center seat belt If the left-hand rear seat backrest is folded down and back up again, the rear center seat belt may lock. The seat belt can then not be pulled out. X To release the rear center seat belt: pull out the seat belt by the belt outlet on the backrest approximately 1 in (25 mm) and release it again. The seat belt is retracted and released.
Releasing seat belts ! Make sure that the seat belt is fully rolled up. Otherwise, the seat belt or belt tongue will be trapped in the door or in the seat mechanism. This could damage the door, the door trim panel and the seat belt. Damaged seat belts can no longer fulfill their protective function and must be replaced. Visit a qualified specialist workshop.
58 Occupant safety
Seat belt adjustment The seat-belt adjustment function adjusts the driver's and front-passenger seat belt to the upper body of the occupants. The belt strap is tightened slightly when: Ryou engage the belt tongue in the belt
buckle and you then turn the SmartKey to position 2 in the ignition lock.
Rthe SmartKey is in position 2 in the ignition lock and you then engage the belt tongue in the buckle.
The seat-belt adjustment will apply a retraction force if any slack is detected between the occupant and the seat belt. Do not hold on to the seat belt tightly while it is adjusting. You can switch the seat-belt adjustment on and off in the on-board computer (Y page 241). The seat-belt adjustment is an integral part of the PRE-SAFE® convenience function. More information about PRE-SAFE® can be found under "PRE-SAFE® (preventative occupant protection)" (Y page 54).
Belt height adjustment
You can adjust the seat belt height on the front seats. Wagon: you can also adjust the belt height on the outer rear seats. Adjust the belt to a height that allows the upper part of the seat belt to be routed across the center of your shoulder.
Occupant safety
59
up to 60 seconds or until the driver's or front-passenger seat belt is fastened.
If the driver/front passenger unfasten their seat belt while the vehicle is in motion, the 7 seat belt warning lamp lights up and a warning tone sounds again. The warning tone ceases after 60 seconds even if the driver or front passenger has still not fastened their seat belt. The 7 seat belt warning lamp stops flashing but remains illuminated. After the vehicle comes to a standstill, the warning tone is reactivated and the 7 seat belt warning lamp flashes again if the vehicle speed again exceeds 15 mph (25 km/h). The 7 seat belt warning lamp only goes out if: Rboth the driver and the front passenger
have fastened their seat belts. or
Rthe vehicle is stationary and a door is open. i For more information on the 7 seat
belt warning lamp, see "Warning and indicator lamps in the instrument cluster, seat belts" (Y page 276).
Emergency Tensioning Devices, belt force limiters G WARNING Pyrotechnic Emergency Tensioning Devices that have been deployed must be renewed. For your safety, when disposing of Emergency Tensioning Devices, always observe the safety instructions. These are available from any authorized Mercedes-Benz Center. The PRE-SAFE® system has electrically operated reversible pre-tensioners that do not require replacement after activation.
! If the front-passenger seat is not
occupied, do not engage the seat belt tongue in the buckle on the front- passenger seat. Otherwise, the Emergency
Example: Sedan X Press release button ? on belt buckle =. X Slide belt tongue ; back to belt sash
guide :.
Belt warning for the driver and front passenger Regardless of whether the driver's and front- passenger seat belts have already been fastened, the 7 seat belt warning lamp lights up for six seconds each time the engine is started. It then goes out if the driver and the front passenger have fastened their seat belts. If the driver's seat belt is not fastened when the engine is started, an additional warning tone will sound. The warning tone goes out after approximately six seconds or once the driver's seat belt is fastened. If after six seconds the driver or front passenger have not fastened their seat belts and the doors are closed, the 7 seat belt warning lamp lights up: Runtil the driver's or front passenger's seat
belt is fastened
Ronce the vehicle has exceeded a speed of 15 mph (25 km/h), in addition a warning tone will sound with increasing intensity for
60
Children in the vehicle
Tensioning Device could be triggered in the event of an accident.
direction during the initial stages of the impact
The front seat belts and the outer seat belts in the rear are equipped with Emergency Tensioning Devices and belt force limiters. The ETDs tighten the seat belts in an accident, pulling them close against the body. The ETDs do not correct incorrect seat positions or incorrectly fastened seat belts. The ETDs do not pull vehicle occupants back towards the backrest. If the seat belt is also equipped with a seat belt force limiter and this is triggered, the force exerted by the seat belt on the vehicle occupant is reduced. When triggered, seat belt force limiters help to reduce the peak force exerted by the seat belt on the vehicle occupant. The belt force limiters for the front seats are synchronized with the front air bags, which take on a part of the deceleration force. This results in the force exerted on the occupant being distributed over a greater area. The ETDs can only be activated when: Rthe ignition is switched on. Rthe restraint systems are operational; see
"SRS warning lamp" (Y page 41).
Rthe belt tongue is engaged in the buckle on each of the lap-shoulder belts in the front. Rthe front-passenger seat is occupied and the belt tongue is engaged in the buckle on the front-passenger side.
The ETDs on the outside seats in the rear compartment are triggered independently of the lock status of the seat belts. The ETDs are triggered depending on the type and severity of an accident: Rif, in the event of a head-on or rear-end
collision, the vehicle decelerates or accelerates rapidly in a longitudinal
Rif, in the event of a side impact, on the side
opposite the impact the vehicle decelerates or accelerates rapidly in a lateral direction
Rif, in certain situations where the vehicle overturns, the system determines that it can provide additional protection
If the ETDs are deployed, you will hear a bang, and a small amount of powder may also be released. Only in rare cases will the bang affect your hearing. The powder that is released generally does not constitute a health hazard. The 6 SRS warning lamp lights up.
Children in the vehicle Child restraint systems Important safety notes G WARNING According to accident statistics, children are safer when properly restrained in the rear seating positions than in the front seating position. Thus, we strongly recommend that children be placed in the rear seats whenever possible. Regardless of seating position, children 12 years old and under must be seated and properly secured in an appropriate infant restraint, toddler restraint, or booster seat recommended for the size and weight of the child. The infant or child restraint must be properly secured with the vehicle's seat belt, the seat belt and top tether strap, or lower anchors and top tether strap, fully in accordance with the child seat manufacturer's instructions. Occupants, especially children, should always sit as upright as possible, wear the seat belt properly and use an appropriately sized infant restraint, toddler restraint, or booster seat recommended for the size and weight of the child.
Children can be killed or seriously injured by an inflating air bag. Note the following important information when circumstances require you to place a child in the front passenger seat: RYour vehicle is equipped with air bag
technology designed to deactivate the front passenger front air bag in your vehicle when the system senses the weight of a typical 12-month-old child or less along with the weight of a standard appropriate child restraint on the front passenger seat.
RFor children larger than the typical
12-month-old child, the front passenger front air bag may or may not be activated. Always make sure the 4 5 indicator lamp is illuminated, indicating that the front passenger front air bag is deactivated.
RA child in a rear-facing child restraint on the
front passenger seat will be seriously injured or even killed if the front passenger front air bag inflates in a collision which could occur under some circumstances, even with the air bag technology installed in your vehicle. The only means to completely eliminate this risk is to never place a child in a rear-facing child restraint in the front seat. We therefore strongly recommend that you always place a child in a rear-facing child restraint in a backseat.
RIf you must install a rear-facing child restraint on the front passenger seat because circumstances require you to do so, make sure the 4 5 indicator lamp is illuminated, indicating that the front passenger front air bag is deactivated. Should the 4 5 indicator lamp not illuminate or go out while the restraint is installed, please check installation. Periodically check the 4 5 indicator lamp while driving to make sure the 4
5 indicator lamp is illuminated. If the 4 5 indicator lamp goes out or remains out, do not transport a child on the front passenger seat until the system has been repaired.Children in the vehicle
61
A child in a rear-facing child restraint on the front passenger seat will be seriously injured or even killed if the front passenger front air bag inflates.
RIf you have to place a child in a forward-
facing child restraint on the front passenger seat, move the seat as far back as possible, use the proper child restraint recommended for the age, size and weight of the child, and secure child restraint with the vehicle's seat belt according to the child seat manufacturer's instructions. G WARNING Infants and small children should never share a seat belt with another occupant. In the event of an accident, they could be crushed between the occupant and seat belt. A child's risk of serious or fatal injuries is significantly increased if the child restraints are not properly secured in the vehicle and/ or the child is not properly secured in the child restraint. Children that are too large for a child restraint must travel in seats using normal seat belts. Position the shoulder belt across the chest and shoulder, not face or neck. A booster seat may be necessary to achieve proper seat belt positioning for children over 41 lb (18 kg) until they reach a height where a lap-shoulder belt fits properly without a booster. When the child restraint is not in use, remove it from the vehicle or secure it with the seat belt to prevent the child restraint from becoming a projectile in the event of an accident.
62
Children in the vehicle
G WARNING When leaving the vehicle, always remove the SmartKey from the ignition lock. Always take the SmartKey with you and lock the vehicle. Do not leave children unattended in the vehicle, even if they are secured in a child restraint system, or with access to an unlocked vehicle. A child's unsupervised access to a vehicle could result in an accident and/or serious personal injury. The children could: Rinjure themselves on parts of the vehicle Rbe seriously or fatally injured through
excessive exposure to extreme heat or cold Rinjure themselves or cause an accident with
vehicle equipment that can be operated even if the SmartKey is removed from the ignition lock or removed from the vehicle, such as seat adjustment, steering wheel adjustment, or the memory function
If children open a door, they could injure other persons or get out of the vehicle and injure themselves or be injured by following traffic. Do not expose the child restraint system to direct sunlight. The child restraint system's metal parts, for example, could become very hot, and the child could be burned on these parts. G WARNING Do not carry heavy or hard objects in the passenger compartment, or trunk (sedan), or cargo compartment (wagon) unless they are firmly secured in place. Unsecured or improperly positioned cargo increases a child's risk of injury in the event of Rstrong braking maneuvers Rsudden changes of direction Ran accident
Further information on secure stowage of loads can be found under "Loading guidelines".
If an infant or child is traveling in the vehicle: RSecure the child with a child or infant seat restraint system appropriate to the age and weight of the child.
RMake sure that the infant or child is
properly secured at all times while the vehicle is in motion.
Mercedes-Benz recommends that you always properly secure all infants and children with a child or infant seat restraint system for the trip. The use of seat belts and infant and child restraint systems is required by law in: Rall 50 states RU.S. territories Rthe District of Columbia Rall Canadian provinces Infants and children must always be seated in an appropriate infant or child restraint system recommended for the size and weight of the child. The infant or child restraint system must be properly secured in accordance with the manufacturer's instructions. All infant or child restraint systems must meet the following standards: RU.S. Federal Motor Vehicle Safety
Standards 213 and 225
RCanadian Motor Vehicle Safety Standards
213 and 210.2
An information label on the child restraint system indicates whether it meets these standards. This information is also provided in the installation instructions supplied with the child restraint system. Always read and follow the manufacturer's instructions when using an infant or child restraint system or booster seat. Observe the warning labels in the vehicle interior or on the infant or child restraint.
Special seat belt retractor G WARNING If you release the seat belt when driving, the special seat belt retractor is deactivated. The released seat belt cannot be engaged again while driving, because the inertia reel pulls in the seat belt a small distance. The child restraint system is no longer properly secured. There is an increased risk of serious injury or even fatal injury. Always keep the seat belt of the activated special seat belt retractor engaged when driving.
With the exception of the driver's seat belt and the seat belts on the folding bench seat in the cargo compartment, all seat belts in the vehicle are equipped with a special seat belt retractor. When activated, the special seat belt retractor ensures that the seat belt will not slacken once the child restraint system has been secured. Installing a child restraint system: X Always comply with the manufacturer's
installation instructions.
X Pull the seat belt smoothly from the seat
belt retractor.
X Engage the seat belt tongue in the belt
buckle.
Activating the special seat belt retractor: X Pull the seat belt out fully and let the seat
belt retractor retract it again. While the seat belt is retracting, you should hear a ratcheting sound. The special seat belt retractor is activated.
X Push down on the child restraint system to
take up any slack.
Children in the vehicle
63
Removing a child restraint system/ deactivating the special seat belt retractor: X Always comply with the manufacturer's
installation instructions.
X Press the seat belt release button and guide the belt tongue to the belt outlet. The special seat belt retractor is deactivated.
LATCH-type (ISOFIX) child seat anchors in the rear G WARNING Children that are too large for a child restraint must travel in seats using normal seat belts. Position shoulder belt across the chest and shoulder, not face or neck. A booster seat may be necessary to achieve proper seat belt positioning for children over 41 lb (18 kg) until they reach a height where a lap/shoulder belt fits properly without a booster. Install the child restraint system in accordance with the manufacturer's instructions. Attach the child restraint system to both securing rings. An incorrectly installed child restraint system could come loose during an accident and seriously or even fatally injure the child. Child restraint systems or child seat securing rings that are malfunctioning or damaged as the result of a collision must be replaced.
! When installing the child restraint system, make sure that the seat belt for the middle seat does not get trapped. The seat belt could otherwise be damaged.
64
Children in the vehicle
fulfill its function. This could cause serious or even fatal injuries.
Top Tether provides an additional connection between a child restraint system, secured with a LATCH-type (ISOFIX) child seat mount, and the rear seat. This helps reduce the risk of injury even further. Sedan
When installing the ISOFIX child restraint system, fold protective caps ; of securing rings : inwards. X Install the LATCH-type (ISOFIX) child seat
securing system. Comply with the manufacturer's instructions when installing.
ISOFIX is a standardized securing system for specially designed child restraint systems on the rear seats. Securing rings for two ISOFIX child restraint systems are installed on the left and right of the rear seats. Secure child restraint systems without a LATCH-type (ISOFIX) child seat securing system using the seat belts in the vehicle. When installing child restraint systems, you must observe the manufacturer's installation instructions.
Top Tether Important safety notes G WARNING Always lock the rear seat backrests in their upright position when the rear seats are occupied by passengers. Lock the rear seat backrests in their upright position before installing the Top Tether straps or when the cargo compartment is not in use. Make sure that rear seat backrests are secured properly by pushing and pulling on the seat backrests. If the seat backrest is not locked properly, the seat backrest could fold forward. The child restraint system is no longer supported properly or held in position and can no longer
Top Tether provides an additional connection between a child restraint system, secured with a LATCH-type (ISOFIX) child seat mount, and the rear seat. This helps reduce the risk of injury even further. The Top Tether anchorage points are located in the rear compartment behind the head restraints. X Move head restraint : upwards. X Fold up cover ; of Top Tether anchorage
A.
X Route Top Tether belt = under head
restraint : between the two head restraint bars.
X Hook Top Tether hook ? into Top Tether
anchorage A.
X Make sure that Top Tether belt = is not
twisted.
X Fold down cover ; of Top Tether
anchorage A.
X Move head restraint : back down again slightly if necessary (Y page 105). Make sure that you do not interfere with the correct routing of Top Tether belt =. X Install the LATCH-type (ISOFIX) child
restraint system with Top Tether. Comply with the manufacturer's installation instructions when doing so. Make sure that Top Tether belt = is tight.
Wagon
Children in the vehicle
65
X Move head restraint : upwards. X Remove combined cargo cover and net
=(Y page 296).
X Route Top Tether belt B under head
restraint : between the two head restraint bars.
X Hook Top Tether hook A into Top Tether
anchorage ? on the back of rear seat backrest ;.
X Make sure that Top Tether belt B is not
twisted.
X Move head restraint : back down again slightly if necessary (Y page 105). Make sure that you do not interfere with the correct routing of Top Tether belt B. X Install the LATCH-type (ISOFIX) child
restraint system with Top Tether. Comply with the manufacturer's installation instructions when doing so. Make sure that Top Tether belt B is tight.
X Install combined cargo cover and net
=(Y page 296).
Child-proof locks Important safety notes G WARNING When leaving the vehicle, always remove the SmartKey from the ignition lock. Always take the SmartKey with you and lock the vehicle. Do not leave children unattended in the vehicle, even if they are secured in a child restraint system, or with access to an unlocked vehicle. A child's unsupervised access to a vehicle could result in an accident and/or serious personal injury. The children could: Rinjure themselves on parts of the vehicle Rbe seriously or fatally injured through
excessive exposure to extreme heat or cold Rinjure themselves or cause an accident with
vehicle equipment that can be operated even if the SmartKey is removed from the
Top Tether provides an additional connection between a child restraint system, secured with a LATCH-type (ISOFIX) child seat mount, and the rear seat. This helps reduce the risk of injury even further. The Top Tether anchorages are attached to the rear of the rear seat backrests.
66 Driving safety systems
ignition lock or removed from the vehicle, such as seat adjustment, steering wheel adjustment, or the memory function
If children open a door, they could injure other persons or get out of the vehicle and injure themselves or be injured by following traffic. Do not expose the child restraint system to direct sunlight. The child restraint system's metal parts, for example, could become very hot, and the child could be burned on these parts.
Child-proof locks for the rear doors G WARNING Children could open a rear door from inside the vehicle. This could result in serious injuries or an accident. Therefore, when children ride in the rear always secure the rear doors with the child-proof locks.
Override feature for the rear side windows G WARNING When children ride on the vehicle's rear seats, activate the override switch. Otherwise, the children could be injured, e.g. by trapping themselves in the rear side window.
X To activate/deactivate: press button ;. If indicator lamp : is lit, operation of the rear side windows is disabled. Operation is only possible using the switches in the driver's door. If indicator lamp : is off, operation is possible using the switches in the rear compartment.
Child-proof lock for the rear door (example: Sedan) You secure each door individually with the child-proof locks on the rear doors. A door secured with a child-proof lock cannot be opened from inside the vehicle. When the vehicle is unlocked, the door can be opened from the outside. X To activate: press the child-proof lock
lever up in the direction of arrow :.
X Make sure that the child-proof locks are
working properly.
X To deactivate: press the child-proof lock lever down in the direction of arrow ;.
Driving safety systems Driving safety systems overview In this section, you will find information about the following driving safety systems: RABS (Anti-lock Braking System)
RBAS (Brake Assist System) (Y page 67) RBAS PLUS (Brake Assist System PLUS)
RESP® (Electronic Stability Program)
REBD (electronic brake force distribution)
(Y page 67)
(Y page 68)
(Y page 69)
(Y page 72)
RADAPTIVE BRAKE(Y page 72) RPRE-SAFE® Brake (Y page 72)
Important safety notes G WARNING HYBRID vehicles: It is imperative that you read the HYBRID Supplemental Operating Instructions included in your vehicle literature portfolio. You may otherwise not receive all necessary safety information and warning for the operation of your vehicle.
If you fail to adapt your driving style or become distracted, the driving safety systems can neither reduce the risk of accident nor override the laws of physics. Driving safety systems are merely aids designed to assist driving. You are responsible for the distance to the vehicle in front, for vehicle speed and for braking in good time. Always adapt your driving style to suit the prevailing road and weather conditions and maintain a safe distance from the vehicle in front. Drive carefully. i The driving safety systems described only work as effectively as possible when there is adequate contact between the tires and the road surface. Please pay special attention to the notes on tires, recommended minimum tire tread depths, etc. (Y page 362). In wintry driving conditions, always use winter tires (M+S tires) and if necessary, snow chains. Only in this way will the driving safety systems described in this section work as effectively as possible.
ABS (Anti-lock Braking System) Important safety notes i Observe the "Important safety notes"
section (Y page 67). G WARNING If ABS is faulty, the wheels could lock when braking. The steerability and braking characteristics may be severely impaired. Additionally, further driving safety systems
Driving safety systems
67
are deactivated. There is an increased danger of skidding and accidents. Drive on carefully. Have ABS checked immediately at a qualified specialist workshop.
When ABS is malfunctioning, other systems, including driving safety systems, will also become inoperative. Observe the information on the ABS warning lamp (Y page 278) and display messages which may be shown in the instrument cluster (Y page 247). ABS regulates brake pressure in such a way that the wheels do not lock when you brake. This allows you to continue steering the vehicle when braking. ABS works from a speed of about 5 mph (8 km/h) upwards, regardless of road-surface conditions. ABS works on slippery surfaces, even if you only brake gently. The yellow ! ABS warning lamp in the instrument cluster lights up when the ignition is switched on. It goes out when the engine is running.
Braking X If ABS intervenes: continue to depress the
brake pedal vigorously until the braking situation is over.
X To make a full brake application:
depress the brake pedal with full force.
If ABS intervenes when braking, you will feel a pulsing in the brake pedal. The pulsating brake pedal can be an indication of hazardous road conditions, and functions as a reminder to take extra care while driving.
BAS (Brake Assist System) i Observe the "Important safety notes"
section (Y page 67).
68 Driving safety systems
G WARNING If BAS is malfunctioning, the braking distance in an emergency braking situation is increased. There is a risk of an accident. In an emergency braking situation, depress the brake pedal with full force. ABS prevents the wheels from locking.
BAS operates in emergency braking situations. If you depress the brake pedal quickly, BAS automatically boosts the braking force, thus shortening the stopping distance. The brakes will function as usual once you release the brake pedal. BAS is deactivated.
BAS PLUS (Brake Assist System Plus) i Observe the "Important safety notes"
section (Y page 67).
BAS PLUS is only available in vehicles equipped with DISTRONIC PLUS. BAS PLUS provides braking assistance in hazardous situations at speeds greater than 4 mph (7 km/h) and uses radar sensor technology to assess the traffic situation. With the help of the radar sensor system, BAS PLUS can detect obstacles that are in the path of your vehicle for an extended period of time. BAS PLUS can also react to stationary obstacles, e.g. stopped or parked vehicles, at speeds of up to approximately 40 mph (70 km/h). To prevent a front-end collision, BAS PLUS calculates the brake force necessary if: Ryou approach an obstacle, and RBAS PLUS has detected a risk of collision For speeds above 20 mph (30 km/h): if you apply the brakes forcefully, BAS PLUS automatically increases the braking force to a level suitable for the traffic conditions. For speeds below 20 mph (30 km/h): if you apply the brakes, BAS PLUS is activated. Braking is performed as late as possible.
If BAS PLUS demands particularly high braking force, preventative passenger protection measures (PRE-SAFE®) are activated simultaneously. X Keep the brake pedal depressed until the
emergency braking situation is over. ABS prevents the wheels from locking. BAS PLUS is deactivated and the brakes function as usual, if: Ryou release the brake pedal. Rthere is no longer any danger of a rear-end
collision.
Rno obstacle is detected in front of your
vehicle.
For BAS PLUS to assist you when driving, the radar sensor system must be: Rswitched on (Y page 241) Roperational (Y page 262) If the radar sensor system is malfunctioning, BAS PLUS will not be available. The brake system is still available with complete brake boosting effect and BAS. G WARNING BAS PLUS cannot always clearly identify objects and complex traffic situations. BAS PLUS cannot intervene in these cases. There is a risk of an accident. Always pay careful attention to the traffic situation and be ready to brake.
In particular, the detection of obstacles can be impaired if there is: Rdirt on the sensors or anything else
covering the sensors
Rsnow or heavy rain Rinterference by other radar sources Rthe possibility of strong radar reflections,
for example in parking garages
Ra narrow vehicle traveling in front, e.g. a
motorbike
Ra vehicle traveling in front on a different line
relative to the center of your vehicle
G WARNING BAS PLUS does not react: Rto people or animals Rto oncoming vehicles Rto crossing traffic Rwhen cornering As a result, BAS PLUS may not intervene in all critical situations. There is a risk of an accident. Always pay careful attention to the traffic situation and be ready to brake.
Following damage to the front end of the vehicle, have the configuration and operation of the radar sensors checked at a qualified specialist workshop. This also applies to collisions at low speeds where there is no visible damage to the front of the vehicle. i This device has been approved by the FCC as a "Vehicular Radar System". The radar sensor is intended for use in an automotive radar system only. Removing, altering or tampering with the device will void any warranties, and is not permitted by the FCC. Do not tamper with, alter, or use the device in any non-approved way. Any unauthorized modification to this device could void the user's authority to operate the equipment.
ESP® (Electronic Stability Program) Important safety notes i Observe the "Important safety notes"
section (Y page 67). G WARNING If ESP® is malfunctioning, ESP® is unable to stabilize the vehicle. Additionally, further driving safety systems are deactivated. This increases the risk of skidding and an accident. Drive on carefully. Have ESP® checked at a qualified specialist workshop.
Driving safety systems
69
! Vehicles with 4MATIC: switch off the
ignition when the parking brake is being tested on a brake dynamometer. Application of the brakes by ESP® may otherwise destroy the brake system.
Vehicles without 4MATIC: when towing your vehicle with the rear axle raised, it is important that you observe the notes on ESP®(Y page 355). ESP® is deactivated if the å warning lamp in the instrument cluster lights up continuously when the engine is running. If the ÷ warning lamp and the å warning lamp are lit continuously, ESP® is not available due to a malfunction. Observe the information on warning lamps (Y page 279) and display messages which may be shown in the instrument cluster (Y page 247). If ESP® detects that the vehicle is deviating from the direction desired by the driver, one or more wheels are braked to stabilize the vehicle. The engine output is also modified to keep the vehicle on the desired course within physical limits. ESP® assists the driver when pulling away on wet or slippery roads. ESP® can also stabilize the vehicle during braking. If ESP® intervenes, the ÷ ESP® warning lamp flashes in the instrument cluster. If ESP® intervenes: X Do not deactivate ESP® under any
circumstances.
X Only depress the accelerator pedal as far
as necessary when pulling away.
X Adapt your driving style to suit the
prevailing road and weather conditions.
i Only use wheels with the recommended
tire sizes. Only then will ESP® function properly.
70 Driving safety systems
ETS/4ETS (Electronic Traction System) Traction control is part of ESP®. Traction control brakes the drive wheels individually if they spin. This enables you to pull away and accelerate on slippery surfaces, for example if the road surface is slippery on one side. On vehicles with 4MATIC, more drive torque is also transferred to the wheel or wheels with traction. Traction control remains active if you deactivate ESP®.
Deactivating/activating ESP® (except AMG vehicles) G WARNING If you deactivate ESP®, ESP® no longer stabilizes the vehicle. There is an increased risk of skidding and an accident. Only deactivate ESP® in the situations described in the following.
! Avoid spinning the driven wheels for an extended period with ESP® deactivated. You could otherwise damage the drivetrain.
X To deactivate:(Y page 236).
The å ESP® OFF warning lamp in the instrument cluster lights up. X To activate: (Y page 236).
The å ESP® OFF warning lamp in the instrument cluster goes out.
the instrument cluster flashes. In such situations, ESP® will not stabilize the vehicle. It may be best to deactivate ESP® in the following situations: Rwhen using snow chains Rin deep snow Ron sand or gravel If you deactivate ESP®: RESP® no longer improves driving stability. Rtraction control is still activated. RESP® still provides support when you
brake.
Rengine torque is not limited and the drive
wheels are able to spin. The spinning wheels produce a cutting effect for better traction.
Deactivating/activating ESP® (AMG vehicles) Activating/deactivating SPORT handling mode G WARNING When SPORT handling mode is activated, there is a greater risk of skidding and accidents. Only activate SPORT handling mode in the situations described in the following.
ESP® is activated automatically when the engine is started. The ECO start/stop function switches the engine off automatically when the vehicle stops moving. The engine starts automatically when the driver wants to pull away again. ESP® remains in its previously selected status. Example: if ESP® was deactivated before the engine was switched off, ESP® remains deactivated when the engine is switched on again. If ESP® is deactivated and one or more wheels start to spin, the ÷ ESP® warning lamp in
X To activate: briefly press button :.
The M SPORT handling mode warning lamp in the instrument cluster lights up. The SPORT handling mode message appears in the multifunction display.
SPORT handling mode is designed for driving on designated roads when the vehicle's own oversteering and understeering characteristics are desired. Driving in SPORT handling mode requires an extremely qualified and experienced driver who is able to cope with these critical driving conditions.
X To deactivate: briefly press button :. The M SPORT handling mode warning lamp in the instrument cluster goes out. ESP® is activated automatically when the engine is started. It may be best to activate SPORT handling mode in the following situations: Rwhen using snow chains Rin deep snow Ron sand or gravel If SPORT handling mode is activated and one or more wheels start to spin, the ÷ ESP® warning lamp in the instrument cluster flashes. ESP® only stabilizes the vehicle to a limited degree. When SPORT handling mode is activated: RESP® only improves driving stability to a
limited degree.
Rtraction control is still activated. RESP® still provides support when you
brake.
Rengine torque is only restricted to a limited
degree, and the drive wheels are able to spin. The spinning wheels produce a cutting effect for better traction.
Vehicles with ECO start/stop function: the ECO start/stop function switches the engine off automatically when the vehicle comes to a stop. The engine starts automatically when the driver wants to pull away again. ESP® remains in its previously selected status. Example: if ESP® was deactivated before the engine was switched off, ESP® remains deactivated when the engine is switched on again.
Driving safety systems
71
Deactivating/activating ESP® G WARNING If you deactivate ESP®, ESP® no longer stabilizes the vehicle. There is an increased risk of skidding and an accident. Only deactivate ESP® in the situations described in the following.
! Avoid spinning the driven wheels for an extended period with ESP® deactivated. You could otherwise damage the drivetrain.
X To deactivate: press button : until the å ESP® OFF warning lamp lights up in the instrument cluster. The ÷OFF message appears in the multifunction display. Deactivate ESP® when driving on designated roads when the vehicle's own oversteering and understeering characteristics are desired. Driving without ESP® requires an extremely qualified and experienced driver who is able to cope with these critical driving conditions.
X To activate: briefly press button :. The å ESP® OFF warning lamp in the instrument cluster goes out. The ÷ON message appears in the multifunction display.
ESP® is activated automatically when the engine is started. If ESP® is deactivated and one or more wheels start to spin, the ÷ ESP® warning lamp in
72 Driving safety systems
the instrument cluster does not flash. In such situations, ESP® will not stabilize the vehicle. It may be best to deactivate ESP® in the following situations: Rwhen using snow chains Rin deep snow Ron sand or gravel If you deactivate ESP®: RESP® no longer improves driving stability. Rtraction control is still activated. RPRE-SAFE® is no longer available, nor is it
activated if you brake firmly and ESP® intervenes.
RPRE-SAFE® Brake is no longer available; it is also not activated if you brake firmly and ESP® intervenes.
RABS still provides support when you brake. Rengine torque is no longer limited and the drive wheels are able to spin. The spinning wheels produce a cutting effect for better traction.
Vehicles with ECO start/stop function: the ECO start/stop function switches the engine off automatically when the vehicle comes to a stop. The engine starts automatically when the driver wants to pull away again. ESP® remains in its previously selected status. Example: if ESP® was deactivated before the engine was switched off, ESP® remains deactivated when the engine is switched on again.
EBD (electronic brake force distribution) i Observe the "Important safety notes"
section (Y page 67). G WARNING If EBD has malfunctioned, the rear wheels can still lock, e.g. under full braking. This increases the risk of skidding and an accident. You should therefore adapt your driving style to the different handling characteristics. Have
the brake system checked at a qualified specialist workshop.
Observe information regarding indicator and warning lamps (Y page 278) as well as display messages (Y page 248). EBD monitors and controls the brake pressure on the rear wheels to improve driving stability while braking.
ADAPTIVE BRAKE ADAPTIVE BRAKE enhances braking safety and offers increased braking comfort. In addition to the braking function, ADAPTIVE BRAKE also has the HOLD function (Y page 196) and hill start assist (Y page 156).
PRE-SAFE® Brake i Observe the "Important safety notes"
section (Y page 67).
PRE-SAFE® Brake is only available in vehicles with DISTRONIC PLUS. PRE-SAFE® Brake can help you to minimize the risk of a collision with a vehicle ahead or reduce the effects of such a collision. If PRE- SAFE® Brake detects a risk of collision, you will be warned visually and acoustically as well as by automatic braking. PRE-SAFE® Brake cannot prevent a collision without your intervention. Above a speed of around 4 mph (7 km/h), this function warns you if you are very quickly approaching a vehicle in front. An intermittent warning tone will then sound and the · distance warning lamp will light up in the instrument cluster. X Brake immediately in order to increase the
distance from the vehicle in front.
or X Take evasive action provided it is safe to do
so.
Driving safety systems
73
If the driver and front passenger have their seat belt fastened, PRE-SAFE® Brake can also brake the vehicle automatically at speeds from approximately 4 mph (7 km/h) to approximately 124 mph (200 km/h). Due to the nature of the system, particularly complicated driving conditions may cause unnecessary warnings or the unnecessary intervention of PRE-SAFE® Brake. You can prevent the intervention of the PRE- SAFE® Brake at any time by: Rdepressing the accelerator pedal further Ractivating kickdown Rreleasing the brake pedal. The braking action of PRE-SAFE® Brake is ended automatically if: Ryou maneuver to avoid the obstacle. Rthere is no longer any danger of a rear-end
collision.
Rthere is no longer an obstacle detected in
front of your vehicle.
With the help of the radar sensor system, PRE-SAFE® Brake can detect obstacles that are in front of your vehicle for an extended period of time. At speeds of up to 40 mph (70 km/h), PRE- SAFE® Brake can also detect stationary obstacles, for example, stopped or parked vehicles. If you approach an obstacle and PRE-SAFE® Brake detects a risk of a collision, the system will alert you both visually and acoustically. If you do not brake or take evasive action, the system will warn you by automatically braking the vehicle gently. If there is an increased risk of collision, preventive passenger protection measures (PRE-SAFE®) are activated (Y page 54). If, at speeds over 20 mph (30 km/h), a risk of collision remains and you do not brake, take evasive action or significantly accelerate, automatic braking may be performed up to the level of emergency braking. Automatic emergency braking is not performed until immediately
prior to an accident that can no longer be avoided. G WARNING PRE-SAFE® Brake will initially brake your vehicle by a partial application of the brakes if a danger of collision is detected. There may be a collision unless you also brake. Automatic emergency braking cannot prevent a collision. There is a risk of an accident. Always apply the brakes yourself and try to take evasive action. G WARNING PRE-SAFE® Brake cannot always clearly identify objects and complex traffic conditions. In these cases, PRE-SAFE® Brake may: Rgive an unnecessary warning and then
brake the vehicle
Rnot give a warning or intervene There is a risk of an accident. Always pay particular attention to the traffic situation and be ready to brake, especially if PRE-SAFE® Brake warns you. Terminate the intervention in a non-critical driving situation.
In particular, the detection of obstacles can be impaired if there is: Rdirt on the sensors or anything else
covering the sensors
Rsnow or heavy rain Rinterference by other radar sources Rthe possibility of strong radar reflections,
for example in parking garages
Ra narrow vehicle traveling in front, e.g. a
motorbike
Ra vehicle traveling in front on a different line
relative to the center of your vehicle G WARNING PRE-SAFE® Brake does not react: Rto people or animals Rto oncoming vehicles
74
Theft deterrent locking system
Rto crossing traffic Rwhen cornering As a result, PRE-SAFE® Brake may neither give warnings nor intervene in all critical situations. There is a risk of an accident. Always pay careful attention to the traffic situation and be ready to brake.
In order to maintain the appropriate distance to the vehicle in front and thus prevent a collision, you must apply the brakes yourself. X To activate/deactivate: activate or
deactivate PRE-SAFE® Brake in the on- board computer (Y page 237). When PRE-SAFE® Brake is activated, the Ä symbol appears in the multifunction display, as long as the HOLD function is deactivated (Y page 196). On vehicles with the Active Parking Assist driving system, the Ä symbol is displayed when position P is engaged or you are driving faster than 22 mph (35 km/h).
For PRE-SAFE® Brake to assist you when driving, the radar sensor system must be switched on (Y page 241) and be operational. Following damage to the front end of the vehicle, have the configuration and operation of the radar sensors checked at a qualified specialist workshop. This also applies to collisions at low speeds where there is no visible damage to the front of the vehicle. i USA only: This device has been approved by the FCC as a "Vehicular Radar System". The radar sensor is intended for use in an automotive radar system only. Removing, altering or tampering with the device will void any warranties, and is not permitted by the FCC. Do not tamper with, alter, or use the device in any non-approved way. Any unauthorized modification to this device could void the user's authority to operate the equipment.
i Canada only: This device complies with RSS-210 of Industry Canada. Operation is subject to the following two conditions: 1. This device may not cause interference, and 2. this device must accept any interference received, including interference that may cause undesired operation of the device. Removal, tampering, or altering of the device will void any warranties, and is not permitted. Do not tamper with, alter, or use the device in any non-approved way. Any unauthorized modification to this device could void the user's authority to operate the equipment.
Theft deterrent locking system Immobilizer X To activate with the SmartKey: remove
the SmartKey from the ignition lock.
X To activate with KEYLESS-GO: switch the
ignition off and open the driver's door. X To deactivate: switch on the ignition. The immobilizer prevents your vehicle from being started without the correct SmartKey. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. Anyone can start the engine if a valid SmartKey has been left inside the vehicle. i The immobilizer is always deactivated
when you start the engine. In the event that the engine cannot be started when the starter battery is fully charged, the immobilizer may be faulty. Contact an authorized Mercedes-Benz Center or call 1-800-FOR-MERCedes (in the USA) or 1-800-387-0100 (in Canada).
