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Driving systems
233
: Symbol for the split screen setting with
: Symbol for the trailer view setting
; Trailer drawbar marker assistant
= Red guide line at a distance of
approximately 12 in (0.30 m) from the ball coupling
Display with the PARKTRONIC display
top view and rear view camera image enlarged
; Red guide line at a distance of
approximately 12 in (0.30 m) from the rear of the vehicle
This view assists you in estimating the distance to the vehicle behind you.
i This setting can also be selected as an
enlarged front view.
Top view with picture from the mirror
camera
: Symbol for the top view and forward-
facing mirror camera setting
; Yellow guide line for the vehicle width
including the exterior mirrors (right side of vehicle)
= Yellow guide line for the vehicle width
including the exterior mirrors (left side of vehicle)
Example: full screen mode with PARKTRONIC display : Symbol for the full screen setting with rear
view camera image
If the vehicle is equipped with PARKTRONIC and the function is active (Y page 219), warning displays ; in the COMAND display are also active or light up accordingly.
PARKTRONIC appears:
Rin split screen view as red or yellow
brackets around the vehicle icon in the top view, or
Rin the full screen view, on the right-hand
side at the bottom as red or yellow brackets around the vehicle icon
234 Driving systems
i The full screen display can also be
Rif you have adopted a sporty driving style
selected as front view.
Exiting 360° camera display mode
As soon as your vehicle exceeds a speed of 19 mph (30 km/h) with the function activated, the function switches off. The COMAND display switches back to the previously selected view. You can also switch the display by selecting the & symbol in the display and pressing W the COMAND controller.
ATTENTION ASSIST
Important safety notes
ATTENTION ASSIST is only an aid to the driver. It might not always recognize fatigue or increasing inattentiveness in time or fail to recognize them at all. The system is not a substitute for a well-rested and attentive driver.
ATTENTION ASSIST helps you during long, monotonous journeys, such as on highways. It is active in the range between 50 mph (80 km/h) and 112 mph (180 km/h).
If ATTENTION ASSIST detects typical indicators of fatigue or increasing lapses in concentration on the part of the driver, it suggests you take a break.
ATTENTION ASSIST assesses your level of fatigue or lapses in concentration by taking the following criteria into account:
Ryour personal driving style, e.g. steering
characteristics
Rjourney details, e.g. time of day and length
of journey
The functionality of ATTENTION ASSIST is restricted and warnings may be delayed or not occur at all:
Rif the road condition is poor, e.g. if the
surface is uneven or if there are potholes
Rif there is a strong side wind
with high cornering speeds or high rates of acceleration
Rif you are predominantly driving slower than 50 mph (80 km/h) or faster than 112 mph (180 km/h)
Rif you are currently using COMAND or
making a telephone call with it
Rif the time has been set incorrectly
Rin active driving situations, such as when
you change lanes or change your speed
Warning and display messages in the
multifunction display
X Activate ATTENTION ASSIST using the on-
board computer (Y page 277). Symbol : appears in the multifunction display.
X The Attention Assist: Take a Break! message appears in the multifunction display. If necessary, take a break.
X Press the a or % button to confirm
the message.
If ATTENTION ASSIST is active, you will be warned no sooner than 20 minutes after your journey has begun. In addition to the message shown in the multifunction display, you will then hear an intermittent warning tone twice.
On long journeys, take regular breaks in good time to allow yourself to rest properly. If you do not take a break and ATTENTION ASSIST still detects increasing lapses in concentration, you will be warned again after 15 minutes at the earliest.
ATTENTION ASSIST is reset when you continue your journey and starts assessing your tiredness again if:
Ryou switch off the engine.
Ryou take off your seat belt and open the
driver's door, e.g. for a change of drivers or to take a break.
Night View Assist Plus
Important safety notes
Night View Assist Plus is only an aid and is not a substitute for attentive driving. Do not rely on the Night View Assist Plus display. You are responsible for the distance to the vehicle in front, for vehicle speed and for braking in good time. Drive carefully and always adapt your driving style to suit the prevailing road and traffic conditions.
The system may be impaired or may not function if:
Rthere is poor visibility, e.g. due to snow,
rain, fog or spray
Rthe windshield is dirty, fogged up or
covered, for instance by a sticker, in the vicinity of the camera
Ron bends, on uphill gradients or downhill
gradients
Pedestrian recognition may be impaired or inoperative if:
Rpedestrians are partially or entirely
obscured by objects, e.g. parked vehicles
Rthe silhouette of the pedestrian in the Night
View Assist Plus display is incomplete or interrupted, e.g. by powerful light reflections
Rpedestrians do not contrast adequately
from the background
Rpedestrians are not in an upright position,
e.g. sitting, squatting or lying
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235
General notes
In addition to the illumination provided by the normal headlamps, Night View Assist Plus uses infrared light to illuminate the road. Night View Assist Plus camera : picks up the infrared light and displays a monochrome image in COMAND. The image displayed in COMAND corresponds to a road lit up by high- beam headlamps. This enables you to see the road's course and any obstacles in good time. If pedestrian recognition is activated, pedestrians recognized by the system are highlighted in the Night View Assist Plus display.
Light from the headlamps of oncoming vehicles does not affect the Night View Assist Plus display in the multifunction display. This is also the case if you cannot switch on the high-beam headlamps due to oncoming traffic.
i Infrared light is not visible to the human
eye and therefore does not glare. Night View Assist Plus can therefore remain switched on even if there is oncoming traffic.
Activating Night View Assist Plus
Activation conditions
You can only activate Night View Assist Plus if:
Rthe SmartKey is in position 2 in the ignition
lock.
Rit is dark.
236 Driving systems
Rthe light switch is in the à or L
= Framing
position.
Rreverse gear has not been engaged.
? Symbol for active pedestrian recognition
i Animals are not recognized by pedestrian
Switching on Night View Assist Plus
recognition.
X Make sure that COMAND is switched on.
X Press button :.
The Night View Assist Plus display appears in the COMAND display.
You can read about how to adjust the brightness of the COMAND display in the COMAND operating instructions.
i The infrared headlamps only switch on
when the vehicle is being driven at speeds of approximately 6 mph (10 km/h). This means that you do not have the full visual range while the vehicle is stationary and cannot check whether Night View Assist Plus is working.
Pedestrian recognition
: Night View Assist Plus display
; Pedestrian recognized
Night View Assist Plus is able to recognize pedestrians by typical characteristics, e.g. a silhouette in the shape of a person.
Pedestrian recognition is then switched on automatically if:
RNight View Assist Plus is activated
Ryou exceed a speed of approximately
6 mph (10 km/h)
Rthe surroundings are dark, e.g. when driving outside built-up areas without street lighting
If pedestrian recognition is active, symbol ? appears. If pedestrians are detected, they are highlighted with framing =. If the pedestrian recognition system has brought a pedestrian to your attention, look through the windshield to evaluate the situation. The actual distance to objects and pedestrians cannot be gaged accurately by looking at a screen.
It may be the case that objects are highlighted as well as pedestrians.
Fogged up or dirty windshield
If the windshield in front of the camera is fogged up or dirty on the inside or outside, the Night View Assist Plus display is affected.
X To defrost: check the automatic air
conditioning settings (Y page 156) and fold down the camera cover (Y page 377).
X To defrost the inside of the windshield: fold down the camera cover (Y page 377) and clean the windshield (Y page 374).
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237
Problems with Night View Assist Plus
Problem
Possible causes/consequences and M Solutions
The picture quality of Night View Assist Plus has deteriorated.
The windshield wipers are smearing the windshield.
X Replace the wiper blades (Y page 137).
The windshield is smeared after the vehicle has been cleaned in a car wash.
X Clean the windshield (Y page 374).
There is windshield chip damage in the camera's field of vision.
X Replace the windshield.
The windshield is fogged up on the inside.
X Defrost the windshield (Y page 156).
The windshield is iced up.
X De-ice the windshield (Y page 155).
There is dirt on the inside of the windshield.
X Clean the inside of the windshield (Y page 374).
Lane Tracking package
General notes
The Lane Tracking package consists of Blind Spot Assist (Y page 237) and Lane Keeping Assist (Y page 239).
Blind Spot Assist
Important safety notes
G WARNING Blind Spot Assist does not react to:
Rvehicles overtaken too closely on the side,
placing them in the blind spot area
Rvehicles approaching and driving by with a
speed difference of more than approximately 6.8 mph (11 km/h)
As a result, Blind Spot Assist may not give warnings in such situations. There is a risk of an accident.
Always observe the traffic conditions carefully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to detect some vehicles and is no substitute for attentive driving.
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, tampering with, or altering the device will void any warranties, and is not permitted by the FCC. Do not tamper with, alter, or use in any non-approved way.
Any unauthorized modification to this device could void the user’s authority to operate the equipment.
General notes
Blind Spot Assist uses a radar sensor system to monitor the areas on both sides of your vehicle. It supports you from a speed of approximately 20 mph (30 km/h). A warning display in the exterior mirrors draws your attention to vehicles detected in the
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monitored area. If you then switch on the corresponding turn signal to change lanes, you will also receive a visual and audible collision warning. Blind Spot Assist uses sensors in the rear bumper for monitoring purposes.
For Blind Spot Assist to assist you when driving, the radar sensor system must be:
Ractivated (Y page 281)
Roperational
Monitoring range of the sensors
In particular, the detection of obstacles can be impaired if:
Rdirt on the sensors or anything else
covering the sensors
Rpoor visibility, e.g. due to fog, heavy rain,
snow or spray
Rnarrow vehicles, e.g. motorcycles or
bicycles
Rthe road has very wide lanes
Rthe road has narrow lanes
Ryou are not driving in the middle of the lane
Rthere are barriers or similar lane borders
Vehicles in the monitoring range are then not indicated.
If the lanes are narrow, vehicles driving in the lane beyond the lane next to your vehicle may be indicated, especially if the vehicles are not driving in the middle of their lane. This may be the case if there are vehicles driving at the inner edge of their lanes.
Due to the nature of the system:
Rwarnings may be issued in error when
driving close to crash barriers or similar solid lane borders.
Rthe warning is canceled when driving for an extended period next to long vehicles, such as trucks.
The two radar sensors for Blind Spot Assist are integrated into the sides of the rear bumper. Make sure that the bumper is free of dirt, ice or slush in the vicinity of the sensors. The sensors must not be covered, for example by cycle racks or overhanging loads. Following a severe impact or in the event of damage to the bumpers, have the condition of the radar sensors checked at a qualified specialist workshop. Blind Spot Assist may otherwise not work properly.
Indicator and warning display
Blind Spot Assist is not active at speeds below approximately 20 mph (30 km/h). Vehicles in the monitoring range are then not indicated.
Blind Spot Assist monitors the area up to 10 ft (3m) behind your vehicle and directly next to your vehicle, as shown in the diagram.
: Yellow indicator lamp/red warning lamp
When Blind Spot Assist is activated, indicator lamp : in the exterior mirrors lights up yellow at speeds of up to 20 mph (30 km/h). At speeds above 20 mph (30 km/h) the
indicator lamp goes out and Blind Spot Assist is operational.
(Y page 277) are activated in the on-board computer.
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239
If a vehicle is detected within the monitoring range of Blind Spot Assist at speeds above 20 mph (30km/h), warning lamp : on the corresponding side lights up red. This warning is always emitted when a vehicle enters the blind spot monitoring range from behind or from the side. When you overtake a vehicle, the warning only occurs if the difference in speed is less than 7 mph (12km/h).
The yellow indicator lamp goes out if reverse gear is engaged. In this event, Blind Spot Assist is no longer active.
The brightness of the indicator/warning lamps is adjusted automatically according to the ambient light.
Collision warning
If a vehicle is detected in the monitoring range of Blind Spot Assist and you switch on the corresponding turn signal, a double warning tone sounds. Red warning lamp : flashes. If the turn signal remains on, vehicles detected are indicated by the flashing of red warning lamp :. There are no further warning tones.
Switching on Blind Spot Assist
X Make sure that the radar sensor system
(Y page 281) and Blind Spot Assist
X Turn the SmartKey to position 2 in the
ignition lock. Warning lamps : in the exterior mirrors light up red for approximately 1.5 seconds and then turn yellow.
Towing a trailer
When you attach a trailer, make sure you have correctly established the electrical connection. This can be accomplished by checking the trailer lighting. In this event, Blind Spot Assist is deactivated. The indicator lamp in the exterior mirrors lights up yellow, and the Blind Spot Assist Currently Unavailable See Operator's Manual message appears in the multifunction display.
i You can deactivate the indicator lamps in
the exterior mirrors.
To do so, switch off Blind Spot Assist when:
Rthe SmartKey is in position 2 in the
ignition lock
Rthe engine is not running
Rthe electrical connection to the trailer
has been established
Lane Keeping Assist
Important safety notes
G WARNING Lane Keeping Assist may not always clearly recognize lane markings.
In this case, Lane Keeping Assist may:
Rgive an unnecessary warning
Rnot give a warning
There is a risk of an accident.
Always pay particular attention to the traffic situation and stay in lane, in particular if warned by Lane Keeping Assist.
240 Driving systems
G WARNING The Lane Keeping Assist warning does not return the vehicle to the original lane. There is a risk of an accident.
You should always steer, brake or accelerate yourself, in particular if warned by Lane Keeping Assist.
General notes
Lane Keeping Assist monitors the area in front of your vehicle by means of a camera at the top of the windshield. Lane Keeping Assist detects lane markings on the road and warns you before you leave your lane unintentionally.
If you fail to adapt your driving style, Lane Keeping Assist can neither reduce the risk of an accident nor override the laws of physics. Lane Keeping Assist cannot take into account the road, traffic and weather conditions. Lane Keeping Assist is merely an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in your lane.
The Lane Keeping Assist does not keep the vehicle in the lane.
The system may be impaired or may not function if:
Rthere is poor visibility, e.g. due to
insufficient illumination of the road, or due to snow, rain, fog or spray
Rthere is glare, e.g. from oncoming traffic, the sun or reflections (e.g. when the road surface is wet)
Rthe windshield is dirty, fogged up, damaged or covered, for instance by a sticker, in the vicinity of the camera
Rthere are no, several or unclear lane
markings for a lane, e.g. in areas with road construction work
Rthe lane markings are worn away, dark or
covered up, e.g. by dirt or snow
Rthe distance to the vehicle in front is too
small and the lane markings thus cannot be detected
Rthe lane markings change quickly, e.g. lanes branch off, cross one another or merge
Rthe road is narrow and winding
Rthere are strong shadows cast on the lane
: Lane Keeping Assist camera
If you select km on the on-board computer in the Display Unit Speed-/Odometer function (Y page 278), Lane Keeping Assist is active starting at a speed of 60 km/h. If the miles display unit is selected, the assistance range begins at 40 mph.
A warning may be given if a front wheel passes over a lane marking. It will warn you by means of intermittent vibration in the steering wheel for up to 1.5 seconds.
Switching on Lane Keeping Assist
X Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select Standard or Adaptive(Y page 277). Symbol : appears in the multifunction display.
If you drive at speeds above 40 mph (60 km/h) and lane markings are detected,
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241
symbol : is shown in green. Lane Keeping Assist is ready for use.
Standard
If Standard is selected, no warning vibration occurs if:
Ryou switch on the turn signals. In this event, the warnings are suppressed for a certain period of time.
Ra driving safety system intervenes, such as
ABS, BAS or ESP®.
Adaptive
If Adaptive is selected, no warning vibration occurs if:
Ryou switch on the turn signals. In this event, the warnings are suppressed for a certain period of time.
Ra driving safety system intervenes, e.g.
ABS, BAS or ESP®.
Ryou accelerate hard, e.g. kickdown.
Ryou brake hard.
Ryou steer actively, e.g. swerve to avoid an
obstacle or change lanes quickly.
Ryou cut the corner on a sharp bend.
In order that you are warned only when necessary and in good time if you cross the lane marking, the system recognizes certain conditions and warns you accordingly.
The warning vibration occurs earlier if:
Active Driving Assistance package
General notes
The Active Driving Assistance package consists of DISTRONIC PLUS (Y page 198), Active Blind Spot Assist (Y page 241) and Active Lane Keeping Assist (Y page 245).
Active Blind Spot Assist
General notes
Active Blind Spot Assist uses a radar sensor system to monitor the side areas of your vehicle which are behind the driver. A warning display in the exterior mirrors draws your attention to vehicles detected in the monitored area. If you then switch on the corresponding turn signal to change lane, you will also receive an optical and audible warning. If a risk of lateral collision is detected, corrective braking may help you avoid a collision. To support the course- correcting brake application, Active Blind Spot Assist uses the forward-facing radar sensor system. The free space in the direction of travel is then evaluated.
Active Blind Spot Assist supports you from a speed of approximately 20 mph (30 km/h).
For Active Blind Spot Assist to assist you when driving, the radar sensor system must be:
Ryou approach the outer lane marking on a
Ractivated (Y page 281)
bend.
Roperational
Rthe road has very wide lanes, e.g. a
highway.
Rthe system recognizes solid lane markings.
The warning vibration occurs later if:
Rthe road has narrow lanes.
Ryou cut the corner on a bend.
Important safety notes
Active Blind Spot Assist is only an aid. It may fail to detect some vehicles and is no substitute for attentive driving.
G WARNING Active Blind Spot Assist does not react to:
Rvehicles overtaken too closely on the side,
placing them in the blind spot area
Rvehicles approaching and driving by with a
speed difference of more than approximately 6.8 mph (11 km/h)
242 Driving systems
As a result, Active Blind Spot Assist may neither give warnings nor intervene in such situations. There is a risk of an accident.
Always observe the traffic conditions carefully, and maintain a safe lateral distance.
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. Removal, tampering, or altering of the device will void any warranties, and is not permitted by the FCC. Do not tamper with, alter, or use 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 harmful 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 in any non-approved way.
Any unauthorized modification to this device could void the user's authority to operate the equipment.
Monitoring area
In particular, the detection of obstacles can be impaired if:
Rdirt on the sensors or anything else
covering the sensors
Rpoor visibility, e.g. due to fog, heavy rain,
snow or spray
Rnarrow vehicles, e.g. motorcycles or
bicycles
Rthe road has very wide lanes
Rthe road has narrow lanes
Ryou are not driving in the middle of the lane
Rthere are barriers or similar lane borders
Vehicles in the monitoring range are then not indicated.
Active Blind Spot Assist monitors the area up to 10 ft (3.0 m) behind your vehicle and directly next to your vehicle, as shown in the diagram. For this purpose, Active Blind Spot Assist uses radar sensors in the rear bumper.
If the lanes are narrow, vehicles driving in the lane beyond the lane next to your vehicle may be indicated, especially if the vehicles are not driving in the middle of their lane. This may be the case if there are vehicles at the inner edge of your lane.
Due to the nature of the system:
Rwarnings may be issued in error when
driving close to crash barriers or similar solid lane borders.
Rwarnings may be interrupted when driving
alongside particularly long vehicles, e.g. trucks, for a prolonged time.
The Active Blind Spot Assist radar sensors are integrated into the front and rear bumpers and behind a cover in the radiator grill. Make sure that the bumpers and the cover in the radiator grill are free of dirt, ice or slush. The rear sensors must not be covered, for example by cycle racks or overhanging cargo. Following a severe impact or in the event of
damage to the bumpers, have the function of the radar sensors checked at a qualified specialist workshop. Active Blind Spot Assist may otherwise no longer work properly.
Indicator and warning display
: Yellow indicator lamp/red warning lamp
Active Blind Spot Assist is not active at speeds below approximately 20 mph (30 km/h). Vehicles in the monitoring range are then not indicated.
When Active Blind Spot Assist is activated, indicator lamp : in the exterior mirrors lights up yellow at speeds of up to 20 mph(30 km/h). At speeds above 20 mph (30km/h), the indicator lamp goes out and Active Blind Spot Assist is operational.
If a vehicle is detected within the monitoring range of Blind Spot Assist at speeds above 20 mph (30km/h), warning lamp : on the corresponding side lights up red. This warning is always emitted when a vehicle enters the blind spot monitoring range from behind or from the side. When you overtake a vehicle, the warning only occurs if the difference in speed is less than 7 mph (12km/h).
The yellow indicator lamp goes out if reverse gear is engaged. In this event, Active Blind Spot Assist is no longer active.
The brightness of the indicator/warning lamps is adjusted automatically according to the ambient light.
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243
Visual and acoustic collision warning
If you switch on the turn signals to change lanes and a vehicle is detected in the side monitoring range, you receive a visual and acoustic collision warning. You then hear a double warning tone and red warning lamp : flashes. If the turn signal remains on, detected vehicles are indicated by the flashing of red warning lamp :. There are no further warning tones.
Course-correcting brake application
G WARNING A course-correcting brake application cannot always prevent a collision. There is a risk of an accident.
Always steer, brake or accelerate yourself, especially if Active Blind Spot Assist warns you or makes a course-correcting brake application. Always maintain a safe distance at the sides.
G WARNING Active Blind Spot Assist does not detect all traffic situations and road users. In very rare cases, the system may make an inappropriate brake application. There is a risk of an accident.
An inappropriate brake application may be interrupted at any time if you steer slightly in the opposite direction or accelerate. Always make sure that there is sufficient distance on the side for other traffic or obstacles.
244 Driving systems
Ra driving safety system intervenes, e.g.
ESP® or PRE-SAFE® Brake.
RESP® is switched off.
Rthe off-road program is activated (vehicles
without the ON&OFFROAD package).
Roff-road program 1 or 2 is activated
(vehicles with the ON&OFFROAD package).
Rthe LOW RANGE off-road gear is activated (vehicles with the ON&OFFROAD package).
Ra loss of tire pressure or a defective tire is
detected.
Switching on Active Blind Spot Assist
If Active Blind Spot Assist detects a risk of a lateral collision in the monitoring range, a course-correcting brake application is carried out. This is meant to assist you in avoiding a collision.
If a course-correcting brake application occurs, red warning lamp : flashes in the exterior mirror and a dual warning tone sounds. In addition, display ; appears in the multifunction display.
The course-correcting brake application is available in the speed range between 20 mph (30 km/h) and120 mph (200km/h).
Either no braking application, or a course- correcting brake application adapted to the driving situation occurs if:
Rthere are vehicles or obstacles, e.g. crash
barriers, located on both sides of your vehicle.
Ra vehicle approaches you too closely at the
side.
Ryou have adopted a sporty driving style with
high cornering speeds.
Ryou clearly brake or accelerate.
X Make sure that the radar sensor system
(Y page 281) and Active Blind Spot Assist (Y page 277) are activated in the on-board computer.
X Turn the SmartKey to position 2 in the
ignition lock. Warning lamps : in the exterior mirrors light up red for approximately 1.5 seconds and then turn yellow.
Towing a trailer
When you attach a trailer, make sure you have correctly established the electrical connection. This can be accomplished by checking the trailer lighting. Active Blind Spot Assist is then deactivated. The indicator lamp lights up yellow in the exterior mirrors and the Active Blind Spot Assist Currently Unavailable See Operator's Manual message appears in the multifunction display.
Active Lane Keeping Assist
General notes
Active Lane Keeping Assist monitors the area in front of your vehicle by means of camera : at the top of the windshield. Active Lane Keeping Assist detects lane markings on the road and warns you before you leave your lane unintentionally. If you do not react to the warning, a lane-correcting application of the brakes can bring the vehicle back into the original lane.
If you select km on the on-board computer in the Display Unit Speed-/Odometer function (Y page 278), Active Lane Keeping Assist is activated starting at a speed of 60 km/h. If the miles display unit is selected, the assistance range begins at 40 mph.
Important safety notes
If you fail to adapt your driving style, Active Lane Keeping Assist can neither reduce the risk of accident nor override the laws of physics. Lane Keeping Assist cannot take into account the road, traffic and weather conditions. Lane Keeping Assist is merely an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in your lane.
Active Lane Keeping Assist cannot continuously keep your vehicle in its lane.
G WARNING Active Lane Keeping Assist cannot always clearly detect lane markings.
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245
In such cases, Active Lane Keeping Assist can:
Rgive an unnecessary warning and then
make a course-correcting brake application to the vehicle
Rnot give a warning or intervene
There is a risk of an accident.
Always pay particular attention to the traffic situation and keep within the lane, especially if Active Lane Keeping Assist alerts you. Terminate the intervention in a non-critical driving situation.
The system may be impaired or may not function if:
Rthere is poor visibility, e.g. due to
insufficient illumination of the road, or due to snow, rain, fog or spray
Rthere is glare, e.g. from oncoming traffic, the sun or reflections (e.g. when the road surface is wet)
Rthe windshield is dirty, fogged up, damaged or covered, for instance by a sticker, in the vicinity of the camera
Rthere are no, several or unclear lane
markings for a lane, e.g. in areas with road construction work
Rthe lane markings are worn away, dark or
covered up, e.g. by dirt or snow
Rthe distance to the vehicle in front is too
small and the lane markings thus cannot be detected
Rthe lane markings change quickly, e.g. lanes branch off, cross one another or merge
Rthe road is narrow and winding
Rthere are highly variable shade conditions
on the roadway
Rno vehicle is detected in the adjacent lane
and there are broken lane markings
Warning vibration in the steering wheel
A warning may be given if a front wheel passes over a lane marking. It will warn you
246 Driving systems
by means of intermittent vibration in the steering wheel for up to 1.5 seconds.
In order that you are warned only when necessary and in good time if you cross the lane marking, the system recognizes certain conditions and warns you accordingly.
The warning vibration occurs earlier if:
Ryou approach the outer lane marking on a
bend.
Rthe road has very wide lanes, e.g. a
freeway.
Rthe system recognizes solid lane markings.
The warning vibration occurs later if:
Rthe road has narrow lanes.
Ryou cut the corner on a bend.
Lane-correcting brake application
G WARNING A lane-correcting brake application cannot always bring the vehicle back into the original lane. There is a risk of an accident.
Always steer, brake or accelerate yourself, especially if Active Lane Keeping Assist warns you or makes a lane-correcting brake application.
G WARNING Active Lane Keeping Assist does not detect traffic conditions or road users. In very rare cases, the system may make an inappropriate brake application, e.g. after intentionally driving over a solid lane marking. There is a risk of an accident.
An inappropriate brake application may be interrupted at any time if you steer slightly in the opposite direction. Always make sure that there is sufficient distance on the side for other traffic or obstacles.
If a lane-correcting brake application occurs, display : appears in the multifunction display.
If you leave your lane, under certain circumstances the vehicle will brake briefly on one side. This is meant to assist you in bringing the vehicle back to the original lane.
This function is available in the range between 40 mph and 120 mph (60 km/h and 200 km/h).
A lane-correcting brake application can only be made after driving over a solid, recognizable lane marking. Before this, a warning must be given by means of intermittent vibration in the steering wheel. In addition, a lane with lane markings on both sides must be recognized. The brake application also slightly reduces vehicle speed.
i A further lane-correcting brake
application can only occur after your vehicle has returned to the original lane.
No lane-correcting brake application occurs if:
Ryou clearly and actively steer, brake or
accelerate.
Ryou cut the corner on a sharp bend.
Ryou have switched on the turn signal.
Ra driving safety system intervenes, e.g. ESP®, PRE-SAFE® Brake or Active Blind Spot Assist.
Ryou have adopted a sporty driving style with
high cornering speeds or high rates of acceleration.
RESP® is switched off.
Rthe transmission is not in position D.
Ron vehicles with a trailer tow hitch, the
electrical connection to the trailer has been correctly established.
Rthe off-road program is activated (vehicles
without the ON&OFFROAD package).
Roff-road program 1 or 2 is activated
(vehicles with the ON&OFFROAD package).
Rthe LOW RANGE off-road gear is activated (vehicles with the ON&OFFROAD package).
Ra loss of tire pressure or a defective tire has
been detected and displayed.
Active Lane Keeping Assist does not detect traffic situations or road users. An inappropriate brake application may be interrupted at any time if you:
Rsteer slightly in the opposite direction
Rswitch on the turn signal
Rclearly brake or accelerate
A lane-correcting brake application is interrupted automatically if:
Ra driving safety system intervenes, e.g. ESP®, PRE-SAFE® Brake or Active Blind Spot Assist.
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Ryou switch on the turn signals. In this
event, the warnings are suppressed for a certain period of time.
Ra driving safety system intervenes, such
as ABS, BAS or ESP®.
If Adaptive is selected, no warning vibration occurs if:
Ryou switch on the turn signals. In this
event, the warnings are suppressed for a certain period of time.
Ra driving safety system intervenes, e.g.
ABS, BAS or ESP®.
Ryou accelerate hard, e.g. kickdown.
Ryou brake hard.
Ryou steer actively, e.g. swerve to avoid
an obstacle or change lanes quickly.
Ryou cut the corner on a sharp bend.
Towing a trailer
When you attach a trailer, make sure you have correctly established the electrical connection. This can be accomplished by checking the trailer lighting.
On-road programs (vehicles with the
Rlane markings can no longer be recognized.
ON&OFFROAD package)
Switching on Active Lane Keeping Assist
General notes
X Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select Standard or Adaptive(Y page 277). Symbol : appears in the multifunction display.
If Standard is selected, no warning vibration occurs if:
The on-road programs assist you during on- road driving and the off-road programs when driving off-road (Y page 252).
The following program messages remain in the multifunction display until the corresponding vehicle level has been set. Up to off-road level 2, you can hide the program messages using the % or a button on the multifunction steering wheel.
248 Driving systems
AUTO program
SPORT program
Select the AUTO program for a more comfortable ride under all normal driving conditions.
Your selection remains stored even if you remove the SmartKey from the ignition lock.
X Selector wheel : engaged: briefly press
selector wheel :. Selector wheel : extends.
X To select: turn selector wheel : until
indicator lamp ; comes on. AUTO indicator = appears in the multifunction display.
RHighway level is set.
RADS (Adaptive Damping System) adapts comfortable damping characteristics to the current operating and driving conditions.
RThe automatic transmission selects the
automatic drive program for a comfortable driving style that provides for optimum fuel consumption.
Select the SPORT program for sporty, dynamic handling.
Your selection remains stored even if you remove the SmartKey from the ignition lock.
X Selector wheel : engaged: briefly press
selector wheel :. Selector wheel : extends.
X To select: turn selector wheel : until
indicator lamp ; comes on. SPORT indicator = appears in the multifunction display.
RThe high-speed level of –15 mm when
compared with highway level is set.
RADS (Adaptive Damping System) adapts
sporty damping characteristics to the current operating and driving conditions.
RThe automatic transmission selects the
automatic drive program for a sporty driving style.
RThe sporty accelerator pedal curve is
selected, e.g. the accelerator pedal no
longer has to be pressed as far to accelerate.
RThe sporty steering curve is selected,
e.g. greater force is required when steering.
i You cannot select the SPORT program if
LOW RANGE has been selected. The Drive Program SPORT Not in LOW RANGE message then appears in the multifunction display.
Snow program
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RHighway level is set.
RADS (Adaptive Damping System) adapts comfortable damping characteristics to the current operating and driving conditions.
R4ETS and the differential lock are
adapted for driving on snow-covered roads.
RThe automatic transmission selects the
automatic drive program for a comfortable driving style that provides for optimum fuel consumption.
RThe soft accelerator pedal curve is
selected, e.g. the accelerator pedal must be pressed significantly further to accelerate.
RThe optimum gear for pulling away is
engaged.
Trailer program
Select the snow program for driving in snow with or without snow chains.
X Selector wheel : engaged: briefly press
selector wheel :. Selector wheel : extends.
X To select: turn selector wheel : until
indicator lamp ; comes on. Snow indicator = appears in the multifunction display.
Select the trailer program when towing a trailer.
250 Driving systems
X Selector wheel : engaged: briefly press
selector wheel :. Selector wheel : extends.
X To select: turn selector wheel : until
indicator lamp ; comes on. Trailer indicator = appears in the multifunction display.
RHighway level is set.
RADS (Adaptive Damping System) adapts comfortable damping characteristics to the current operating and driving conditions.
RThe automatic transmission selects the
automatic drive program for a comfortable driving style that provides for optimum fuel consumption, changing gear at optimum points.
RWhile pulling away, the differential locks
are engaged.
Off-road driving systems
4MATIC (permanent four-wheel drive)
If you fail to adapt your driving style, 4MATIC can neither reduce the risk of accident nor override the laws of physics. 4MATIC cannot take account of road, weather and traffic conditions. 4MATIC is only an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in your lane.
! Never tow the vehicle with one axle
raised. This may damage the transfer case. Damage of this sort is not covered by the Mercedes-Benz Limited Warranty. All wheels must remain either on the ground or be fully raised. Observe the instructions for towing the vehicle with all wheels in full contact with the ground.
! A function or performance test should
only be carried out on a two-axle dynamometer. Before you operate the vehicle on such a dynamometer, please consult a qualified workshop. You could
otherwise damage the drive train or the brake system.
4MATIC ensures that all four wheels are permanently driven. Together with ESP® and 4ETS, it improves the traction of your vehicle whenever a drive wheel spins due to insufficient grip.
i In wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if you use winter tires (M+S tires), with snow chains if necessary.
Further information about "Driving off-road" (Y page 191).
DSR (Downhill Speed Regulation)
Important safety notes
DSR assists you when driving downhill. It keeps the speed of travel at the speed set on the on-board computer. The steeper the downhill gradient, the greater the DSR braking effect on the vehicle. When driving on flat stretches of road or on an uphill gradient, the DSR braking effect is minimal or nonexistent.
DSR controls the set speed when it is active and the automatic transmission is in the D, R or N position. By accelerating or braking, you can always drive at a higher or a lower speed than that set on the on-board computer.
Further information about "Driving off-road" (Y page 191).
If you fail to adapt your driving style, DSR can neither reduce the risk of accident nor override the laws of physics. DSR cannot take account of road, weather and traffic conditions. DSR is only an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in your lane.
You are always responsible for keeping control of the vehicle and for assessing whether the downhill gradient can be managed. DSR may not always be able to keep to the set speed, depending on road
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251
surface and tire conditions. Select a set speed suitable for the prevailing conditions and when necessary, apply the brakes manually.
If the current vehicle speed is too high, the à DSR symbol appears in the multifunction display with the Max. Speed 25 mph message (Canada: 40 km/h).
G WARNING If the speed driven and the set speed deviate and you activate DSR on a slippery road surface, the wheels may lose traction. If the wheels lose traction. the vehicle can no longer be steered. There is an increased danger of skidding and accidents.
Never activate DSR on slippery road surfaces.
Activating DSR
G WARNING If you drive faster than the set speed and activate DSR, the vehicle will decelerate on downhill gradients. If you do not know the set speed, the vehicle could decelerate unexpectedly. There is a risk of an accident.
Decelerate the vehicle to the set speed before activating DSR. If you do not know what the stored set speed is, store the desired set speed again.
i You cannot activate DSR if the SPORT on- road program is activated. The à DSR symbol and the Not in Drive Program SPORT message then appear in the multifunction display.
Deactivating DSR
X Press button :.
Indicator lamp ; goes out. The à DSR symbol appears in the multifunction display with the Off message.
DSR switches off automatically if you drive faster than 28 mph (Canada: 45 km/h). The à DSR symbol appears in the multifunction display with the Off message. The status indicator in the multifunction display goes out. You also hear a warning. On vehicles with the ON&OFFROAD package, if you select a different on-road/off-road program, DSR is also deactivated.
Changing the set speed
Example: vehicles with the ON&OFFROAD package : DSR button
; DSR indicator lamp
X Press button :.
Indicator lamp ; lights up. The à DSR symbol appears in the multifunction display.
You can only activate DSR when driving at speeds below 25 mph (40 km/h).
252 Driving systems
X To increase or decrease in 1 mph
increments (Canada: 1 km/h increments): briefly press the cruise control lever up : for a higher set speed or down ; for a lower set speed. The set speed appears in the multifunction display with theà DSR symbol. It is also displayed in status indicator =.
When DSR is activated, you can change the set speed to a value between 1 mph and 11 mph (Canada: between 2 km/h and 18 km/h).
i The DSR set speed is always changed in
1 mph increments (Canada: 1 km/h increments). This is regardless of whether you press the cruise control lever to or beyond the pressure point.
Off-road program (vehicles without the
ON&OFFROAD package)
: Off-road program button
; Off-road program indicator lamp
X To switch on: press button :.
Indicator lamp ; lights up. The Ç off- road indicator appears in the multifunction display.
X To switch off: press button :.
Indicator lamp ; and the Ç off-road indicator go out in the multifunction display.
The off-road program assists you in driving off-road. The engine’s performance characteristics and the gearshifting
characteristics of the automatic transmission are adapted for this purpose. ABS, ESP® and 4ETS programs especially adapted to off-road driving are activated. A gentle accelerator pedal curve is also selected, i.e. the accelerator pedal must be depressed much further in order to accelerate.
Do not use the off-road program on roads that are snow-covered or icy or if you have mounted snow chains on your vehicle.
For information about driving off-road, see (Y page 191).
Off-road programs (vehicles with the
ON&OFFROAD package)
General notes
The off-road programs assist you in driving off-road. The engine’s performance characteristics and the gearshifting characteristics of the automatic transmission are adapted for this purpose. ABS, ESP® and 4ETS programs especially adapted to off-road driving are activated. An accelerator pedal curve suitable for the terrain is selected, i.e. the accelerator pedal must be depressed further to accelerate.
Do not use the off-road programs on roads that are snow-covered or icy or if you have mounted snow chains on your vehicle.
For information on driving off-road, see (Y page 191).
The following program messages are shown in the multifunction display until the applicable vehicle level is set. Up to off-road level 2, you can hide the program messages using the % or the a button on the multifunction steering wheel.
Off-road program 1
Off-road program 2
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253
X Selector wheel : engaged: briefly press
X Selector wheel : engaged: briefly press
selector wheel :. Selector wheel : extends.
selector wheel :. Selector wheel : extends.
X To select: turn selector wheel : until
X To select: turn selector wheel : until
indicator lamp ; comes on. Off-road indicator = appears in the multifunction display.
indicator lamp ; comes on. Off-road indicator = appears in the multifunction display.
Off-road level 1 is set to +1.2 in (+ 30 mm) above the highway level.
ROff-road level 1 is set to +2.4 in
(+60 mm) above the highway level.
If you drive at a speed above 70 mph (110 km/h), off-road program 1 switches to AUTO program.
Select off-road program 1 for gentle off-road terrain, e.g. for gravel or sand surfaces or tracks. The engine's torque is restricted to a limited degree and the drive wheels can spin. The spinning wheels produce a cutting effect for better traction.
You can only activate off-road program 1
when driving at speeds below 60 mph (100 km/h). The Drive Program OFFROAD 1 Max Speed 60 mph (100 km/h) message appears in the multifunction display.RDSR is switched on.
RThe differential lock is closed.
Off-road program 2 automatically switches to off-road program 1 if you drive faster than 30 mph (45 km/h).
Select off-road program 2 for rough terrain, e.g. for steep and/or rough terrain or driving on rocky terrain.
i Your vehicle has an automatically
activated differential lock for the transfer case. It controls the balance between the front and rear axles.
254 Driving systems
The differential lock improves the vehicle’s traction. 4ETS (Y page 71) controls the balance between both wheels on an axle.
General notes
You can only activate off-road program 2
when driving at speeds below 25 mph (40 km/h).LOW RANGE off-road gear (vehicles
with the ON&OFFROAD package)
Important safety notes
G WARNING If you select the LOW RANGE off-road gear on a slippery road surface, the wheels could lose traction:
Rif you remove your foot from the
accelerator pedal when driving
Rif off road ABS intervenes when braking
If the wheels lose traction. the vehicle can no longer be steered. There is an increased danger of skidding and accidents.
Never select the LOW RANGE off-road gear when driving on slippery road surfaces.
G WARNING If you do not wait for the transfer case gear change process to complete, the transfer case could remain in the neutral position. The power transmission to the driven wheels is then interrupted. There is a danger of the vehicle rolling away unintentionally. There is a risk of an accident.
Wait until the transfer case shift process is completed.
Do not turn off the engine while changing gear and do not shift the automatic transmission to another position.
: LOW RANGE off-road gear button
; LOW RANGE off-road gear indicator lamp
HIGH RANGE Position for all normal on-
road driving conditions
LOW RANGE Off-road position for driving off-road and fording
The transmission ratio between the engine and
