2011 Mercedes-benz C Class Owners Manual

restraint systems without the ISOFIX securing system. Follow the manufacturer's instructions for of child restraint systems. ! When installing the child restraint system, make sure that the seat belt for the center seat does not get trapped. Otherwise, the seat belt could be damaged.

Special seat belt retractor G Warning Observe "Important safety notes" (Y page 55). All seat belts in the vehicle, except the driver's seat belt, are equipped with a special seat belt retractor. When activated, the special seat belt retractor ensures that the seat belt cannot slacken after being fastened. Installing a child restraint system: X Always comply with the manufacturer's

installation instructions.

X Pull the seat belt smoothly from the inertia

reel.

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 inertia

reel retract it again. While the seat belt is retracting, you should hear a ratcheting sound. The special seat belt retractor function is enabled.

X Push down on the child restraint system to

take up any slack.

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 function is deactivated. G Warning Never release the seat belt buckle while the vehicle is in motion, since the special seat belt retractor will be deactivated.

LATCH-type (ISOFIX) child seat anchors G Warning Observe "Important safety notes" (Y page 55).

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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 fulfill its function. This could cause serious or even fatal injuries.

Top Tether provides an additional attachment point between the "LATCH" type child seat mount (ISOFIX) child restraint system and the rear seat. This can further reduce the risk of injury. The Top Tether anchorages are located in the rear compartment behind the head restraints.

X Move head restraint : upwards. X Fold up cover ; of Top Tether anchorage

=.

Vehicles without a through-loading feature in the rear bench seat Installation instruction : indicates the installation point of securing ring =. X Remove protective caps ; from securing rings = by pulling in the direction of the arrow.

Vehicles with a through-loading feature in the rear bench seat X Install the LATCH-type (ISOFIX) child

restraint system. Comply with the manufacturer's instructions when installing the LATCH-type (ISOFIX) child restraint system.

Top Tether G Warning Observe "Important safety notes" (Y page 55). G Warning Always lock the rear seat backrests in their upright position when the rear seats are

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Children in the vehicle

X Route Top Tether belt A under the head restraint : between both head restraint bars.

X Hook Top Tether hook ? into Top Tether

anchorage =.

X Make sure that Top Tether belt A is not

twisted.

X Fold down cover ; of Top Tether

anchorage =.

X If necessary, push head restraint : back down slightly (Y page 96). Make sure that the routing of Top Tether belt A is not impaired.

X Install the LATCH-type (ISOFIX) child

restraint system with Top Tether. Always comply with the manufacturer's installation instructions. Make sure that Top Tether belt A is taut.

Child-proof locks Child-proof locks for the rear doors G Warning Observe "Important safety notes" (Y page 55). 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.

You can 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 ;.

Override feature for the rear side windows G Warning Observe "Important safety notes" (Y page 55). 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,

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operation is possible using the switches in the rear compartment.

Panic alarm

X To activate: press and hold !

button : for about one second. An alarm sounds and the exterior lighting flashes.

X To deactivate: press ! button :

again.

or X Insert the SmartKey into the ignition lock. or X Press the KEYLESS-GO Start-Stop button.

The KEYLESS-GO key must be in the vehicle.

i USA only:

This device complies with the part 15 of the FCC regulations. Operation is subject to the following two conditions: 1. This device may not cause interference, and 2. This device must withstand any interference received, including interference that may cause undesired operation. Any unauthorized modification to this device could void the user's authority to operate the equipment.

i Canada only:

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61

This device complies with the RSS-210
regulations of Industry Canada. Operation is subject to the following two conditions: 1. This device may not cause interference, and 2. This device must withstand any interference received, including interference that may cause undesired operation of the device. Any unauthorized modification to this device could void the user's authority to operate the equipment.

Driving safety systems Overview of driving safety systems In this section, you will find information about the following driving safety systems: RABS (Anti-lock Braking System) RBAS (Brake Assist System) RESP® (Electronic Stability Program) REBD (Electronic Brake-power Distribution) RADAPTIVE BRAKE

Important safety notes G Warning The following factors increase the risk of accidents: RExcessive speed, especially in turns RWet and slippery road surfaces RFollowing another vehicle too closely The driving safety systems described in this section cannot reduce these risks or prevent the natural laws of physics from acting on the vehicle. They cannot increase braking or steering efficiency beyond that afforded by the condition of the vehicle brakes and tires or the traction afforded. Only a safe, attentive, and skillful driver can prevent accidents. The capabilities of a vehicle equipped with the driving safety systems described in this

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section must never be exploited in a reckless or dangerous manner which could jeopardize the user's safety or the safety of others. Always adjust your driving style to the prevailing road and weather conditions and keep a safe distance to other road users and objects on the street. If a driving system malfunctions, other driving safety systems may also switch off. Observe indicator and warning lamps that may come on as well as messages in the multifunction display that may appear.

i 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 G Warning Observe "Important safety notes" (Y page 61). G Warning Do not pump the brake pedal. Use firm, steady brake pedal pressure instead. Pumping the brake pedal defeats the purpose of the ABS and significantly reduces braking effectiveness.

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 when you only brake gently. The ! warning lamp in the instrument cluster lights up when the ignition is switched on. It goes out when the engine is running.

Braking If ABS intervenes when braking, you will feel a pulsing in the brake pedal. X If ABS intervenes: continue to depress the

brake pedal with force until the braking situation is over.

X To make a full brake application:

depress the brake pedal with full force. G Warning If the ABS malfunctions, other driving systems such as the BAS or the ESP® are also switched off. Observe indicator and warning lamps that may come on as well as messages in the multifunction display that may appear. If the ABS malfunctions, the wheels may lock during hard braking, reducing the steering capability and extending the braking distance.

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) G Warning Observe "Important safety notes" (Y page 61). BAS operates in emergency braking situations. If you depress the brake pedal quickly, BAS automatically boosts the braking force, thus shortening the stopping distance. X Keep the brake pedal firmly depressed until

the emergency braking situation is over. ABS prevents the wheels from locking. The brakes will function as usual once you release the brake pedal. BAS is deactivated. G Warning If the BAS malfunctions, the brake system still functions, but without the additional brake boost available that the BAS would normally provide in an emergency braking maneuver. Therefore, the braking distance may increase.

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ESP® (Electronic Stability Program) Important safety notes G Warning Observe "Important safety notes" (Y page 61).

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. If necessary, 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 ä warning lamp flashes in the instrument cluster. G Warning! Never switch off the ESP when you see the ESP warning lamp ä flashing in the instrument cluster. In this case proceed as follows: RWhen driving off, apply as little throttle as

possible.

RWhile driving, ease up on the accelerator

pedal.

RAdapt your speed and driving style to the

prevailing road conditions.

Failure to observe these guidelines could cause the vehicle to skid. The ESP cannot prevent accidents resulting from excessive speed.

! Vehicles without 4MATIC: switch the

ignition off when: Rthe parking brake is being tested using a

dynamometer

Rthe vehicle is being towed with the front

axle raised

Application of the brakes by ESP® may otherwise destroy the brake system.

! 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 with 4MATIC: function or

performance tests may only be carried out on a 2-axle dynamometer. If you wish to operate the vehicle on such a dynamometer, please consult an authorized Mercedes-Benz Center in advance. You could otherwise damage the drive train or the brake system.

i Only use wheels with the recommended

tire sizes. Only then will ESP® function properly.

ETS/4ETS (Electronic Traction System) G Warning Observe "Important safety notes" (Y page 61).

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 The ESP® should not be switched off during normal driving other than in the circumstances described below. Disabling the system will reduce vehicle stability in driving maneuvers. Do not switch off the ESP® when a spare wheel is mounted.

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ESP® is activated automatically when the engine is running. It may be best to deactivate ESP® in the following situations: Rwhen using snow chains Rin deep snow Ron sand or gravel G Warning! Activate ESP® as soon as the situations described above no longer apply. ESP® will otherwise not be able to stabilize the vehicle if the vehicle starts to skid or a wheel starts to spin.

If you deactivate ESP®: RESP® no longer improves driving stability. Rthe engine's torque is no longer limited and the drive wheels can spin. The spinning of the wheels results in a cutting action, which provides better grip.

Rtraction control is still activated. RESP® still provides support when you

brake.

If ESP® is deactivated and one or more wheels start to spin, the ä warning lamp in the instrument cluster flashes. In such situations, ESP® will not stabilize the vehicle. X To deactivate:(Y page 178).

The å warning lamp in the instrument cluster lights up. G Warning When the å ESP OFF warning lamp lights up, ESP is switched off. When the ä ESP warning lamp and the å ESP OFF warning lamp are on continuously, ESP is not operational due to a malfunction. When ESP is switched off or not operational, the vehicle's stability during standard driving maneuvers is reduced.

Adapt your driving style to suit the prevailing road conditions/weather conditions and to the non-operating status of ESP.

! Avoid spinning a drive wheel for an

extended period with ESP switched off. This could cause serious damage to the drive train.

X To activate:(Y page 178).

The å warning lamp in the instrument cluster goes out.

Deactivating/activating ESP® (AMG vehicles) Activating/deactivating SPORT handling mode G Warning The SPORT handling mode should not be switched on during normal driving. Switching on the SPORT handling mode will result in the following: Rno restriction to the engine torque Rsystem supported traction control is

limited

The SPORT handling mode is designed for driving on closed tracks when the vehicle's own natural oversteer and understeer characteristics are desired and requires a highly skilled and experienced driver able to handle these critical driving situations. You could lose control of your vehicle and cause an accident. Please be aware of these limits when you switch on the SPORT handling mode. Do not switch on the SPORT handling when a spare wheel is mounted.

SPORT handling mode is active automatically as long as the engine is running.

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It may be best to activate SPORT handling mode in the following situations: Rwhen using snow chains Rin deep snow Ron sand or gravel G Warning Switch off the SPORT handling mode and switch on the ESP® immediately if the aforementioned circumstances do not apply anymore. Otherwise the SPORT handling mode will only stabilize the vehicle to a limited extent when it is starting to skid or a wheel is spinning.

When SPORT handling mode is activated: RESP® only improves driving stability to a

limited degree.

Rthe engine's torque is restricted to a limited degree and the drive wheels can spin. The spinning of the wheels results in a cutting action, which provides better grip.

Rtraction control is still activated. RESP® still provides support when you brake

firmly.

If SPORT handling mode is activated and one or more wheels start to spin, the ä warning lamp in the instrument cluster flashes. ESP® only stabilizes the vehicle to a limited degree.

X To activate: briefly press button :. The M warning lamp in the instrument cluster lights up. The SPORT handling

Driving safety systems mode message appears in the multifunction display.

65

X To deactivate: briefly press button :.

The M warning lamp in the instrument cluster goes out.

Activating/deactivating ESP® G Warning! The ESP® should not be switched off during normal driving. Disabling of the system will result in the following: Rno restriction to engine torque Rloss of system-supported traction control "ESP® OFF" is designed for driving on closed tracks when the vehicle’s natural oversteer and understeer characteristics are desired and requires a highly skilled and experienced driver able to handle these critical driving situations. You could lose control of your vehicle and cause an accident. Please be aware of these limits when you switch off the ESP®. Do not switch off the ESP® when a spare wheel is mounted.

ESP® is activated automatically when the engine is running. It may be best to deactivate ESP® in the following situations: Rwhen using snow chains Rin deep snow Ron sand or gravel G Warning! Activate ESP® as soon as the situations described above no longer apply. ESP® will otherwise not be able to stabilize the vehicle if the vehicle starts to skid or a wheel starts to spin.

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If you deactivate ESP®: RESP® no longer improves driving stability. Rthe engine's torque is no longer limited and

the drive wheels are able to spin. The spinning of the wheels results in a cutting action, which provides better grip.

Rtraction control is still activated. RESP® still provides support when you brake

firmly.

If ESP® is deactivated and one or more wheels start to spin, the ä warning lamp in the instrument cluster does not flash. In such situations, ESP® will not stabilize the vehicle.

X To deactivate: press button : until the

å warning lamp lights up in the instrument cluster. The message ESC-OFF appears in the multifunction display. G Warning When the å ESP OFF warning lamp lights up, ESP is switched off. When the ä ESP warning lamp and the å ESP OFF warning lamp are on continuously, ESP is not operational due to a malfunction. When ESP is switched off or not operational, the vehicle's stability during standard driving maneuvers is reduced. Adapt your driving style to suit the prevailing road conditions/weather conditions and to the non-operating status of ESP.

! Avoid spinning a drive wheel for an

extended period with ESP switched off. This could cause serious damage to the drive train.

X To activate: briefly press button :. The å warning lamp in the instrument cluster goes out. The message ESC-ON appears in the multifunction display.

EBD G Warning Observe "Important safety notes" (Y page 61). EBD monitors and controls the brake pressure on the rear wheels to improve driving stability while braking. G Warning! If the EBD malfunctions, the brake system will still function with full brake boost. However, the rear wheels could lock up during emergency braking situations, for example. You could lose control of the vehicle and cause an accident. Adapt your driving style to the changed driving characteristics.

Adaptive Brake ADAPTIVE BRAKE enhances braking safety and offers increased braking comfort. In addition to the braking function, ADAPTIVE BRAKE also features the hill start assist function (Y page 135). For further information, see Driving tips (Y page 152).

Anti-theft systems Immobilizer The immobilizer prevents your vehicle from being started without the correct key.

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When leaving the vehicle, always take the SmartKey with you and lock the vehicle. The engine can be started by anyone with a valid key that is left inside the vehicle. 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. 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 USA) or 1-800-387-0100 (in Canada).

ATA (Anti-Theft Alarm system) A visual and audible alarm is triggered if the alarm system is armed and you open: Ra door Rthe vehicle with the mechanical key Rthe trunk lid Rthe hood The alarm is not switched off, even if you close the open door that has triggered it, for example. i If the alarm stays on for more than 30

seconds, the emergency call system mbrace (USA only) or TELEAID (Canada only) initiates a call to the Customer Assistance Center automatically. The emergency call system initiates the call provided that: Ryou have subscribed to the mbrace/

TELEAID service.

X To arm: lock the vehicle with the SmartKey

or KEYLESS-GO. Indicator lamp : flashes. The alarm system is armed after approximately 15
seconds.

X To deactivate: unlock the vehicle using the

SmartKey or KEYLESS-GO.

X To stop the alarm using the SmartKey: insert the SmartKey into the ignition lock. The alarm is switched off.

or X Press the % or & button on the

SmartKey. The alarm is switched off.

X To stop the alarm using KEYLESS-GO: grasp the outside door handle. The key must be outside the vehicle. The alarm is switched off.

or X Press the Start/Stop button on the

dashboard. The key must be inside the vehicle. The alarm is switched off.

Rthe mbrace/TELEAID service has been

activated properly.

Rthe required mobile phone, power supply

and GPS are available.

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Vehicle equipment .............................. 70
SmartKey ............................................. 70
Doors .................................................... 77
Trunk .................................................... 80
Side windows ...................................... 83
Sliding sunroof .................................... 86

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Vehicle equipment

i This manual describes all the standard and optional equipment of your vehicle which was available at the time of purchase. Country-specific differences are possible. Bear in mind that your vehicle may not feature all functions described here. This also refers to safety-related systems and functions.

SmartKey Important safety notes G Warning! When leaving the vehicle, always remove the SmartKey from the starter switch. 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 starter switch or removed from the vehicle, such as seat adjustment, steering wheel adjustment, or the memory function

G Warning! Do not carry heavy or hard objects in the passenger compartment or trunk 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

General information If the SmartKey is faulty, contact Roadside Assistance or an authorized Mercedes-Benz Center.

SmartKey functions Locking and unlocking centrally The SmartKey centrally locks/unlocks: Rthe doors Rthe trunk lid Rthe fuel filler flap

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 by these parts.

: & To lock the vehicle ; F To unlock the trunk lid = % To unlock the vehicle When unlocking, the turn signals flash once. When locking, they flash three times. When it is dark, the surround lighting also comes on if it is activated in the on-board computer.

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You can also set an audible signal to confirm that the vehicle has been locked or unlocked. The audible signal can be activated and deactivated using the on-board computer (Y page 181). i Only for USA:

This equipment complies with Part 15 of the FCC regulations. Operation is subject to the following conditions: Rthis equipment must not emit harmful,

electromagnetic radiation.

Rthis equipment may be affected by electromagnetic radiation, including radiation which can trigger unwanted functions.

Any unauthorized change to this equipment can lead to the user's operating license being withdrawn. i Only for Canada:

This equipment complies with the RSS-210
regulations of Industry Canada. Operation is subject to the following conditions: Rthis equipment must not emit harmful,

electromagnetic radiation.

Rthis equipment receives electromagnetic radiation, including radiation which can trigger unwanted functions.

Any unauthorized change to this equipment can lead to the user's operating license being withdrawn.

X To unlock centrally: press the %

button.

If you do not open a door or the trunk lid within approximately 40 seconds of unlocking the vehicle: Rthe vehicle is locked again. Rthe theft deterrent locking system is

activated again.

X To lock centrally: press the & button.

KEYLESS-GO General notes i Only for USA:

This equipment complies with Part 15 of the FCC regulations. Operation is subject to the following conditions: Rthis equipment must not emit harmful,

electromagnetic radiation.

Rthis equipment may be affected by electromagnetic radiation, including radiation which can trigger unwanted functions.

Any unauthorized change to this equipment can lead to the user's operating license being withdrawn. i Only for Canada:

This equipment has been released in accordance with RSS - 210 of Industry Canada. Operation is subject to the following conditions: Rthis equipment must not emit harmful,

electromagnetic radiation.

Rthis equipment receives electromagnetic radiation, including radiation which can trigger unwanted functions.

Any unauthorized change to this equipment can lead to the user's operating license being withdrawn.

Important information for using KEYLESS-GO RYou can use the KEYLESS-GO key as a

conventional key.

RYou can combine KEYLESS-GO functions

with those of a conventional key (e.g. open with KEYLESS-GO and close with the & button).

RAlways carry your KEYLESS-GO key on your

person.

RNever keep the KEYLESS-GO key with: - electronic equipment, such as your

mobile phone or another key

- metal objects, such as coins or metal foil

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This may impair the functioning of KEYLESS- GO. RTo open or close the vehicle, the KEYLESS- GO key should be no more than 3 ft (1 m) from the door or trunk.

RWhen the vehicle is parked for more than

72 hours, the KEYLESS-GO function is deactivated. Pull one of the outer door handles and turn on the ignition to reactivate the KEYLESS-GO function. RIf the KEYLESS-GO key is not near the

vehicle, it is possible that the system may not recognize it. In this case, the vehicle cannot be locked or started with KEYLESS- GO.

RIf the KEYLESS-GO key has been removed from the vehicle (e.g. if a passenger leaves the vehicle with the KEYLESS-GO key): - while someone is holding the Start/Stop button or attempting to lock the vehicle with the outer door handle, the message Key not detected appears in the multifunction display - while the engine is running, the red message Key not detected appears in the multifunction display as you pull away. Find the KEYLESS-GO key or change its current position immediately (e.g. place it on the front-passenger seat or carry it in your shirt pocket.)

RIf you have started the engine using the

Start/Stop button, you can turn if off again by: - pressing the Start/Stop button again inserting the KEYLESS-GO key in the ignition lock when the vehicle is stationary and the automatic transmission is in parking position P.

RYou may accidentally unlock the vehicle if the KEYLESS-GO key is within 3 ft (1 m) of the vehicle and: - an outer door handle comes into contact

with water

or

- you are cleaning an outer door handle. RNote that the engine can be started by any vehicle occupant if a KEYLESS-GO key is in the vehicle. Option 1: there is a KEYLESS-GO key in the vehicle and a KEYLESS-GO key outside the vehicle. If you leave the KEYLESS-GO key behind when you get out and lock the vehicle, a message does not appear in the multifunction display. Option 2: there is a KEYLESS-GO key in the vehicle but no KEYLESS-GO key outside the vehicle. When you get out and try to lock the vehicle, the message Key still in vehicle appears in the multifunction display. The vehicle is not locked in this case.

When starting the engine and while driving, KEYLESS-GO also checks whether a valid key is in the vehicle by periodically establishing radio contact.

X To unlock the vehicle: touch the inner

surface of the door handle.

X To lock the vehicle: touch sensor

surface :.

X Convenience closing feature: touch

sensor surface ; for an extended period (Y page 84).

If you pull on the handle of the trunk lid, only the trunk/cargo area of the vehicle is unlocked.

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Mechanical key General notes If the vehicle can no longer be locked or unlocked with the SmartKey, use the mechanical key. If you use the mechanical key to unlock and open the driver's door or the trunk lid, the anti-theft alarm system will be triggered (Y page 67). There are several ways to turn off the alarm: X Press the % or & button on the

SmartKey.

or X Insert the SmartKey into the ignition lock. or X Press the Start/Stop button in the ignition lock. The SmartKey must be in the vehicle.

or X Lock or unlock the vehicle using KEYLESS-

GO. The SmartKey must be outside the vehicle.

If you unlock the vehicle using the mechanical key, the fuel filler flap will not be unlocked automatically. X To unlock the fuel filler flap: insert the

SmartKey in the ignition lock.

Removing the mechanical key

i If the vehicle has been parked for a long time, the sensor surfaces are deactivated automatically. Pull the door handle to unlock the door and turn on the ignition once to activate the sensor surfaces again.

Changing the settings of the locking system You can change the settings of the locking system in such a way that only the driver's door and the fuel filler flap are unlocked. This is useful if you frequently travel on your own. X To change the setting: press the %

and & buttons simultaneously for approximately six seconds until the battery check lamp flashes twice.

The SmartKey now functions as follows: X To unlock the driver's door: press the

% button once.

X To unlock centrally: press the %

button twice.

X To lock centrally: press the & button. The KEYLESS-GO function is changed as follows: X To unlock the driver's door: touch the inner surface of the door handle on the driver's door.

X To unlock centrally: touch the inner

surface of the door handle on the front- passenger door or the rear door. X To lock centrally: touch sensor

surface : on one of the door handles.

Restoring the factory settings X Press the % and & buttons

simultaneously for approximately six seconds until the battery check lamp flashes twice.

X Push release catch : in the direction of the arrow and at the same time remove mechanical key ; from the SmartKey.

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SmartKey

SmartKey battery Important safety notes It is advisable to have batteries replaced at a qualified specialist workshop, e.g. at an authorized Mercedes-Benz Center. G Warning! Batteries are toxic and contain caustic substances. For this reason, keep batteries out of the reach of children. If a battery has been swallowed, visit a doctor immediately. G Warning SmartKey batteries contain perchlorate material, which may require special handling and regard for the environment. Check with your local government's disposal guidelines. California residents, see www.dtsc.ca.gov/ HazardousWaste/Perchlorate/ index.cfm.

Checking the battery

i You can obtain a SmartKey battery at any

authorized Mercedes-Benz Center.

i If the SmartKey battery is checked within

signal range of the vehicle, pressing the & or % button results in the vehicle being locked or unlocked respectively.

Changing the battery You require a CR 2025 3 V cell battery. X Take the mechanical key out of the

SmartKey (Y page 73).

X Press mechanical key ; into the opening

in the SmartKey in the direction of the arrow until battery tray cover : opens. Do not hold the cover closed while doing so.

X Press the & or % button.

The SmartKey battery is working properly if battery charge indicator lamp : lights up briefly.

If battery charge indicator lamp : does not light up briefly during the test, the SmartKey battery is discharged. X Replace the SmartKey battery

(Y page 74).

X Remove the cover of the battery tray. X Repeatedly tap the SmartKey against your

palm until battery = falls out.

X Insert the new battery with the positive

pole facing upwards. Use a lint-free cloth to do so.

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X Insert the front tabs of the battery tray's

cover first and then press to close it.

X Check the function of all SmartKey buttons

on the vehicle.

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SmartKey

Problems with the SmartKey Problem You cannot lock/ unlock the vehicle using the SmartKey.

Possible causes/consequences and M Solutions The SmartKey battery is discharged or nearly discharged. X Point the tip of the SmartKey at the driver's door handle from a

distance of approximately 1.5 ft (50 cm) and try to unlock or lock the vehicle again.

If this does not work: X Lock or unlock the vehicle using the mechanical key

(Y page 73).

X Check the key battery and replace it if necessary (Y page 74). The SmartKey is faulty. X Lock the vehicle as described in the "Locking the vehicle

(mechanical key)" section (Y page 79) or unlock it using the mechanical key (Y page 73).

X Have the SmartKey checked at a qualified specialist workshop. KEYLESS-GO is in standby mode because the vehicle has not been unlocked for an extended period. X Pull the door handle and then turn the SmartKey to position 2

in the ignition lock.

There is a malfunction with KEYLESS-GO. X Lock/unlock the vehicle using the remote control function of the SmartKey. Point the tip of the SmartKey at the driver's door handle from close range and press the %/& button.

X Have the SmartKey checked at a qualified specialist workshop. There is interference from a powerful source of radio waves. X Lock/unlock the vehicle using the remote control function of the SmartKey. Point the tip of the SmartKey at the driver's door handle from close range and press the %/& button.

X Have the SmartKey canceled at an authorized Mercedes-Benz

Center.

X Report the loss immediately to the vehicle insurers. X If necessary, have the locks changed as well.

You can no longer lock/unlock the vehicle using KEYLESS- GO.

You have lost a SmartKey.

You have lost the mechanical key.

X Report the loss immediately to the vehicle insurers. X If necessary, have the locks changed as well.

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Problem The engine cannot be started using the SmartKey.

Possible causes/consequences and M Solutions The on-board voltage is too low. X Switch off non-essential consumers, e.g. seat heating or interior

lighting, and try to start the engine again.

If this does not work: X Check the starter battery and charge it if necessary

(Y page 259).

or X Jump-start the vehicle (Y page 262). or X Consult a qualified specialist workshop. The steering lock is mechanically blocked. X Remove the SmartKey and re-insert it into the ignition lock. While doing this, turn the steering wheel in both directions.

A door is open. Therefore, the SmartKey cannot be detected as easily. X Close the door and try to start the vehicle again. There is interference from a powerful source of radio waves. X Start your vehicle with the SmartKey in the ignition lock.

The engine cannot be started using the SmartKey.

The engine cannot be started using KEYLESS- GO. The SmartKey is in the vehicle.

Doors Important safety notes G Warning! When leaving the vehicle, always remove the SmartKey from the starter switch. 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 starter switch 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 by these parts. G Warning! Do not carry heavy or hard objects in the passenger compartment or trunk unless they are firmly secured in place.

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Centrally locking and unlocking the vehicle from the inside The locking or unlocking buttons of the central locking do not lock or unlock the fuel filler flap. i You cannot unlock the vehicle centrally

from the inside if the vehicle has been locked with the SmartKey or KEYLESS-GO.

i It is only possible to lock the vehicle centrally if the front-passenger door is closed.

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

Unlocking and opening doors from the inside You can open a door from inside the vehicle even if it has been locked, unless the child- proof locks have been activated (Y page 60). Only open the door if traffic conditions allow you to do so. If the vehicle has previously been locked with the SmartKey or with KEYLESS-GO, opening a door from the inside will trigger the anti- theft alarm system. Switch off the alarm (Y page 67).

X Front door: pull door handle ;.

If the door is locked, locking knob : pops up. The door is unlocked and can be opened.

X Rear door: pull up locking knob : on the

respective rear door. The rear door is unlocked and can be opened.

X To unlock: press button :. X To lock: press button ;. You can open a locked front door from inside the vehicle. Only open the door if traffic conditions allow you to do so. If the vehicle has previously been locked with the central locking button: Rand the KEYLESS-GO key is restored to the

factory settings, the entire vehicle is unlocked if a front door is opened from inside the vehicle.

Rand the KEYLESS-GO key is set to individual

settings, only the front door which is opened from inside the vehicle is unlocked.

Automatic locking i The vehicle locks automatically when the

ignition is switched on and the wheels of the vehicle are moving at a speed of more than 9 mph(15 km/h). You may therefore

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lock yourself out if the vehicle is being pushed, towed, or located on a test rig.

X Insert the mechanical key into the lock of

the driver's door as far as it will go.

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X To deactivate: press and hold button : for about five seconds until a tone sounds. X To activate: press and hold button ; for

about five seconds until a tone sounds.

i When you push either of the two buttons

and an audible warning signal does not sound, the relevant setting has already been selected.

On vehicles with a luxury multifunction steering wheel, you can also activate and deactivate the automatic locking using the on-board computer (Y page 181).

Unlocking the driver's door (mechanical key) If the vehicle can no longer be unlocked centrally with the SmartKey or KEYLESS-GO: X Take the mechanical key out of the

SmartKey (Y page 73).

X Turn the mechanical key counter-clockwise

to position 1. The door is unlocked.

X Turn the mechanical key back and remove

it.

Locking the vehicle (mechanical key) Emergency locking If the vehicle can no longer be locked centrally with the SmartKey or KEYLESS-GO: X Open the driver's door. X Close the front-passenger door, the rear

doors and the trunk lid.

X Press the locking button (Y page 78). X Make sure that the locking knobs on the

doors are still visible. Press down the locking knobs by hand, if necessary.

X Close the driver's door. X Take the mechanical key out of the

SmartKey (Y page 73).

X Insert the mechanical key into the lock of

the driver's door as far as it will go.

X Turn the mechanical key clockwise as far

as it will go to position 1.

X Turn the mechanical key back and remove

it.

X Make sure that the doors and the trunk lid

are locked.

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Trunk

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 G Warning Make sure the trunk lid is closed when the engine is running and while driving. Among other dangers, deadly carbon monoxide (CO) gases may enter the vehicle interior resulting in unconsciousness and death.

! The trunk lid swings upwards when

opened. Therefore, make sure that there is sufficient clearance above the trunk lid.

For the trunk lid to be opened fully, there must be a minimum clearance from floor to ceiling of 5.90 ft (1.80 m). The trunk lid can be: Ropened and closed manually from outside Ropened automatically from outside

Opening and closing manually Opening You can only open the trunk lid after unlocking it first. You can only unlock the trunk lid when the vehicle is stationary. X Press the % button on the SmartKey.

i If you lock the vehicle as described above,

the fuel filler flap is not locked. The anti- theft alarm system is not activated.

Trunk Important safety notes Do not leave the SmartKey in the trunk. You could otherwise lock yourself out. 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 unsupervised in the vehicle, even if they are secured in a child restraint system, and do not give them access to an unlocked vehicle. A child's unsupervised access to a vehicle could result in an accident and/or serious personal injury. They could: Rinjure themselves on vehicle parts Rbe seriously or fatally injured by extreme

heat or cold

Rinjure themselves or have an accident with

vehicle equipment that may still be in operation even after the SmartKey has been removed from the ignition, such as the seat adjustment, steering wheel adjustment or memory function.

If children open a door, they could cause severe or even fatal injury to other persons; if they get out of the vehicle, they could injure themselves when doing so or be seriously or even fatally injured by any passing 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 a child could be burned on these parts. G Warning! Do not carry heavy or hard objects in the passenger compartment or trunk unless they are firmly secured in place.

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X Pull handle :. X Raise the trunk lid.

Closing G Warning To prevent possible personal injury, always keep hands and fingers away from the trunk opening when closing the trunk lid. Be especially careful when small children are around.

X Pull the trunk lid down using recess :. X Lock the vehicle if necessary with

the & button on the SmartKey or with KEYLESS-GO (Y page 71).

Automatic opening and closing from the outside Important safety guidelines G Warning Make sure the trunk lid is closed when the engine is running and while driving. Among other dangers, deadly carbon monoxide (CO) gases may enter the vehicle interior resulting in unconsciousness and death.

! The trunk lid swings upwards when

opened. Therefore, make sure that there is sufficient clearance above the trunk lid.

For the trunk lid to be opened fully, there must be a minimum clearance from floor to ceiling of 5.90 ft (1.80 m).

Opening You can open the trunk lid automatically using the SmartKey or the handle in the trunk lid. X Press and hold the F button on the

SmartKey until the trunk lid opens.

or X When the trunk is unlocked, pull on the

trunk lid handle and let it go again immediately.

Closing i If you leave a KEYLESS-GO key in the

trunk, the trunk lid will not lock.

Opening automatically from the inside G Warning Make sure the trunk lid is closed when the engine is running and while driving. Among other dangers, deadly carbon monoxide (CO) gases may enter the vehicle interior resulting in unconsciousness and death.

You can open the tailgate from the driver's seat when the vehicle is stationary.

X To open: press the upper section of remote operating switch : for the trunk lid until the trunk lid opens.

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Trunk

Locking the trunk separately You can lock the trunk separately. If you then unlock the vehicle centrally, the trunk remains locked and cannot be opened. X Close the trunk lid. X Take the mechanical key out of the

SmartKey (Y page 73).

X Insert the mechanical key into the trunk lid

lock as far as the stop.

X Turn the mechanical key clockwise from

position 1 to position 2. X Remove the mechanical key.

Unlocking the trunk (mechanical key) ! The trunk lid swings upwards when

opened. Therefore, make sure that there is sufficient clearance above the trunk lid. If the trunk can no longer be unlocked with the SmartKey or KEYLESS-GO: X Take the mechanical key out of the

SmartKey (Y page 73).

X Insert the mechanical key into the trunk lid

lock as far as the stop.

X Turn the mechanical key counter-clockwise

as far as it will go to position 2. The trunk is unlocked.

X Turn the mechanical key back to basic

position 1 and remove it.

Emergency trunk release You can open the trunk lid from inside the vehicle with the emergency release button.

The trunk lid can be unlocked and opened with the trunk lid emergency release when the vehicle is stationary or while driving. Trunk lid emergency release light: RThe button flashes for 30 minutes after the

trunk lid is opened.

RThe button flashes for 60 minutes after the

trunk lid is closed.

The trunk lid emergency release does not open the trunk lid if the battery is disconnected or discharged.

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Side windows Important safety notes G Warning! When leaving the vehicle, always remove the SmartKey from the starter switch. 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 starter switch 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 by these parts. G Warning! Do not carry heavy or hard objects in the passenger compartment or trunk 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

G Warning! When opening or closing the door windows, make sure there is no danger of anyone being harmed by the opening/closing procedure. The door windows are equipped with the automatic operation and anti-entrapment features. If during automatic operation a door window encounters an obstruction that blocks its path, the anti-entrapment feature will stop the door window and open it slightly. The door windows operate differently when the switch is pulled and held. See the section about the side windows for details. The closing of the door windows can be immediately halted by releasing the switch or, if the switch was pulled past the resistance point and released, by either pressing or pulling the respective switch. If a door window encounters an obstruction that blocks its path in a circumstance where you are closing the door windows by pressing and holding button & on the SmartKey or by pressing and holding the sensor surface (vehicles with KEYLESS-GO) on an outside door handle, the anti-entrapment feature will not operate. Activate the override switch when children are riding in the back seats of the vehicle. The children may otherwise injure themselves, e.g. by becoming trapped in the door window opening. G Warning! Do not keep any part of your body up against the window pane when opening a window. The downward motion of the pane may pull that part of your body down between the window pane and the door frame and trap it there. If there is a risk of entrapment, release the switch and pull it to close the window.