2011 Mercedes-benz CL Class Owners Manual

there is high atmospheric humidity. X Drive with the headlamps switched on.

The headlamps clear up after a short distance.

If the moisture does not disappear, the headlamp casing is not sealed correctly and moisture has been able to enter. X Have the headlamps checked at a qualified

specialist workshop.

Overhead control panel : p To switch the left-hand reading lamp

on/off

; v To switch the rear interior lighting

on/off

= c To switch the front interior lighting

on/off

? | To switch the automatic interior

lighting control on/off

A p To switch the right-hand reading

lamp on/off

Interior lighting control Important notes In order to prevent the vehicle's battery from discharging, the interior lighting functions are automatically deactivated after some time except for when the key is in position 2 in the ignition lock.

Automatic interior lighting control X To switch on/off: press the | button. The OFF indicator lamp shows whether the automatic interior lighting control is deactivated (indicator lamp on) or activated (indicator lamp off).

250 Changing bulbs

The interior lighting automatically switches on if you: Runlock the vehicle Ropen a door Rremove the key from the ignition lock The interior light is activated for a short while when the key is removed from the ignition lock. You can activate this delayed switch-off using COMAND (Y page 232).

Manual interior lighting control X To switch the front interior lighting on/

off: press the c button.

X To switch the rear interior lighting on/

off: press the u button.

X To switch the reading lamps on/off:

press the p button.

Changing bulbs Important safety notes Xenon bulbs If your vehicle is equipped with Xenon bulbs, you can recognize this by the following: the cone of light from the Xenon bulbs moves from the top to the bottom and back again when you start the engine. For this to be observed, the lights must be switched on before starting the engine. G Warning Xenon bulbs carry a high voltage. You could get an electric shock and be seriously or even fatally injured if you touch the electric contacts on Xenon bulbs. Therefore, never remove the cover from Xenon bulbs. Do not change Xenon bulbs yourself, but have them replaced at a qualified specialist workshop which has the necessary specialist knowledge and tools to carry out the work required. Mercedes-Benz recommends that you use an authorized Mercedes-Benz Center for this

purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

Bulbs and lamps are an important aspect of vehicle safety. You must therefore make sure that these function correctly at all times. Have the headlamp setting checked regularly.

Other bulbs G Warning! Bulbs and lamps can be very hot. You should therefore allow them to cool down before you change them. Otherwise, you could be burned if you touch them. Keep bulbs out of the reach of children. Otherwise, they could damage the bulbs, for example, and injure themselves. Never use a bulb which has been dropped. Such a bulb may break or even explode and injure you. Halogen bulbs are pressurized and can explode when you change them, particularly if they are very hot. You should therefore wear eye protection and gloves when you are changing them.

There are bulbs other than the Xenon bulbs that you cannot replace. Replace only the bulbs listed (Y page 251). Have the bulbs that you cannot replace yourself changed at a qualified specialist workshop. Mercedes-Benz recommends that you use an authorized Mercedes-Benz Center for this purpose. In particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop. If you require assistance changing bulbs, consult a qualified specialist workshop. Do not touch the glass tube of new bulbs with your bare hands. Even minor contamination can burn into the glass surface and reduce the service life of the bulbs. Always use a lint- free cloth or only touch the base of the bulb when installing. Only use bulbs of the correct type.

Windshield wipers

251

If the new bulb still does not light up, consult a qualified specialist workshop. Bulbs and lamps are an important aspect of vehicle safety. You must therefore make sure that these function correctly at all times. Have the headlamp setting checked regularly.

Overview: changing bulbs/bulb types You can change the following bulbs. The bulb type can be found in the legend.

X Turn housing cover ; counter-clockwise

and pull it out.

X Turn bulb holder : counter-clockwise and

pull it out.

X Take the bulb out of bulb holder :. X Insert the new bulb into bulb holder :. X Insert bulb holder :. X Turn bulb holder : clockwise. X Align housing cover ; and turn it

clockwise until it engages.

Windshield wipers Switching the windshield wipers on/ off G Warning! Wiper blades are components that are subject to wear and tear. Replace the wiper blades twice a year, preferably in the spring and fall. Otherwise the windshield will not be wiped properly. As a result, you may not be able to observe surrounding traffic conditions and could cause an accident.

! Do not operate the windshield wipers when the windshield is dry, as this could damage the wiper blades. Moreover, dust that has collected on the windshield can scratch the glass if wiping takes place when the windshield is dry.

! If the windshield wipers leave smears on the windscreen after the vehicle has been washed in an automatic car wash, wax or other residues may be the reason for this. Clean the windshield using washer fluid after washing the vehicle in an automatic car wash.

Bi-Xenon headlamps : High-beam spot lamp: H7 55 W

Infrared light (Night View Assist Plus): H11 55 W

Changing the front bulbs High-beam spot lamp/infrared light (Night View Assist Plus)

X Switch off the lights. X Open the hood.

252 Windshield wipers

Replacing the wiper blades Important safety notes G Warning For safety reasons, switch off the windshield wipers and remove the key from the ignition lock before changing the wiper blades (vehicles with KEYLESS-GO: make sure that the on-board electronics are in state 0). Otherwise, the wiper motor could be switched on suddenly and cause injury.

! To avoid damaging the wiper blades,

make sure that you touch only the wiper arm of the wiper.

! Never open the hood if a windshield wiper

arm has been folded away from the windshield. Never fold a windshield wiper arm without a wiper blade back onto the windshield. Hold the windshield wiper arm firmly when you change the wiper blade. If you release the windshield wiper arm without a wiper blade and it falls onto the windshield, the windshield can be damaged by the force of the impact. Mercedes-Benz recommends that you have the wiper blades replaced by a qualified specialist workshop, e.g. at an authorized Mercedes-Benz Center.

! Always position the windshield wiper

arms vertically before folding them away from the windshield. By doing so, you will avoid damage to the hood.

Combination switch 1 $ Windshield wipers off 2 Ä Intermittent wipe, low13
3 Å Intermittent wipe, high14
4 ° Continuous wipe, slow 5 ¯ Continuous wipe, fast B í Single wipe/ î to wipe the

windshield using washer fluid

X Switch the ignition on. X Turn the combination switch to the

corresponding position.

! Intermittent wiping with rain sensor: due

to optical influences and the windshield becoming dirty in dry weather conditions, the windshield wipers may be activated inadvertently. This could then damage the windshield wiper blades or scratch the windshield. For this reason, you should always switch off the windshield wipers in dry weather.

In the Ä or Å position, the appropriate wiping frequency is automatically set according to the intensity of the rain. In the Å position, the rain sensor is more sensitive than in the Ä position, causing the windshield wipers to wipe more frequently.

13 Rain sensor set to low sensitivity. 14 Rain sensor set to high sensitivity.

Windshield wipers

253

Replacing the windshield wiper blades Moving the wiper arms to a vertical position Vehicles without KEYLESS-GO X Turn the key to position 1 or 2 in the ignition

lock.

X Set the windshield wipers to

position ° on the combination switch.

X When the wiper arms have reached a

vertical position, turn the key to position 0 and remove it from the ignition lock.

Vehicles with KEYLESS-GO X Switch off the engine. X Take your foot off the brake pedal. X Set the windshield wipers to

position ° on the combination switch.

X Press the Start/Stop button repeatedly

until the windshield wipers start.

X When the wiper arms have reached a vertical position, press the Start/Stop button.

Removing the wiper blades X Fold the wiper arm away from the

windshield until it engages.

X Set the wiper blade at right angles to the

wiper arm.

Installing the wiper blade X Slide the new wiper blade into the retainer on the wiper arm in the opposite direction to the arrow. Make sure that the wiper blade slides fully into the retainer on the wiper arm.

X Turn the wiper blade parallel to the wiper

arm.

X Fold the wiper arm back onto the

windshield.

Problems with the windshield wipers The windshield wipers are obstructed Leaves or snow, for example, may be obstructing the windshield wiper movement. The wiper motor has been deactivated. X For safety reasons, you should remove the

key from the ignition lock.

or X Switch off the engine using the Start/Stop

button and open the driver's door.

X Remove the cause of the obstruction. X Switch the windshield wipers back on.

The windshield wipers are inoperative The windshield wiper drive is malfunctioning. X Select another wiper speed on the

combination switch.

X Have the windshield wipers checked at a

qualified specialist workshop.

X Remove the wiper blade from the retainer

on the wiper arm in the direction of the arrow.

254

Vehicle equipment ............................ 256
Overview of climate control sys- tems ................................................... 256
Operating the control systems ........ 258
Setting the air vents ......................... 262

255

256 Overview of climate control systems

i Ventilate the vehicle for a brief period

during warm weather, e.g. using the convenience opening feature (Y page 86). This will speed up the cooling process and the desired vehicle interior temperature will be reached more quickly.

i The integrated filter can remove most

particles of dust and removes pollen completely. A clogged filter reduces the amount of air supplied to the vehicle interior. For this reason, you should always observe the interval for replacing the filter, which is specified in the Service Booklet. As it depends on environmental conditions, e.g. heavy air pollution, the interval may be shorter than stated in the Service Booklet. i It is possible that the interior blower may be activated automatically 40 minutes after the SmartKey is removed. The vehicle is then ventilated for 30 minutes to dry the air-conditioning system.

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.

Overview of climate control systems Important safety notes G Warning Severe conditions (e.g. strong air pollution) may require replacement of the filter before its scheduled replacement interval. A clogged filter will reduce the air volume to the interior and the windows could fog up, impairing visibility and endangering you and others. Have a clogged filter replaced as soon as possible at an authorized Mercedes-Benz Center. G Warning Follow the recommended settings for heating and cooling given on the following pages. Otherwise, the windows could fog up, impairing visibility and endangering you and others.

Automatic climate control regulates the temperature and the humidity in the vehicle interior and filters undesirable substances from the air. Automatic climate control is only operational when the engine is running15. Optimum operation is only achieved when you drive with the side windows and tilt/sliding sunroof closed. Some functions of automatic climate control can also be set via COMAND (Y page 234).

15 The "residual heat" function can only be switched on/off if the ignition is switched off.

Overview of climate control systems

257

Automatic climate control control panel

Function

: Sets climate control to

automatic, left

; Sets the temperature, left = Sets the airflow, left ? Defrosts the windshield

A Activates/deactivates air-

recirculation mode

B Switches climate control on/

off

C Switches the residual heat

function on/off

D Switches the rear window

defroster on/off

E Sets the airflow, right

i Notes/tips Activate climate control using the à rocker switch. The indicator lamp in the à rocker switch lights up. Set the temperature to 72 ‡ (22 †).

Only use the "defrosting" function briefly until the windshield is clear again. Only use "air-recirculation" mode briefly, e.g. if there are unpleasant outside odors or when in a tunnel. The windows could otherwise fog up as, in air- recirculation mode, no fresh air is drawn into the vehicle.

Use the residual heat function if you want to heat or ventilate the vehicle interior when the ignition is switched off. The "residual heat" function can only be activated or deactivated with the ignition switched off.

258 Operating the control systems

Function

F Sets the temperature, right G Sets climate control to

automatic, right

i Notes/tips Set the temperature to 72 ‡ (22 †). Activate climate control using the à rocker switch. The indicator lamp in the à rocker switch lights up.

Operating the control systems Switching the control on/off Important information G Warning! When the climate control system is deactivated, the outside air supply and circulation are also deactivated. Only choose this setting for a short time. Otherwise the windows could fog up, impairing visibility and endangering you and others.

i Activate climate control primarily using

the à rocker switch (Y page 258).

Activating/deactivating X Turn the key to position 2 in the ignition

lock.

X To switch on: press the ^ rocker

switch up or down. The indicator lamp in the rocker switch goes out. The previously selected settings come into effect again.

X To switch off: press the ^ rocker

switch up or down. The indicator lamp in the rocker switch lights up.

Activating/deactivating cooling with air dehumidification Important information The cooling with air dehumidification function is only available when the engine is running. The air inside the vehicle is cooled and

dehumidified according to the temperature selected. G Warning If you switch off the cooling function, the vehicle will not be cooled when weather conditions are warm. The windows can fog up more quickly. Window fogging may impair visibility and endanger you and others.

Condensation may drip from the underside of the vehicle when the automatic climate control is in cooling mode. This is normal and not a sign that there is a malfunction. You can activate or deactivate the "cooling with air dehumidification" function via COMAND (Y page 236). i The cooling with air dehumidification function uses refrigerant R134a. This coolant does not contain chlorofluorocarbons, and therefore does not damage the ozone layer.

Problems with the "cooling with air dehumidification" function If you can no longer switch on the cooling with air dehumidification function via COMAND, the cooling with air dehumidification function is switched off due to a malfunction. X Consult a qualified specialist workshop.

Setting climate control to automatic G Warning If you switch off the cooling function, the vehicle will not be cooled when weather conditions are warm. The windows can fog up

more quickly. Window fogging may impair visibility and endanger you and others.

In automatic mode, the set temperature is maintained automatically at a constant level. The system automatically regulates the temperature of the dispensed air, the airflow and the air distribution. Automatic mode will achieve optimal operation if cooling with air dehumidification is also activated. If desired, cooling with air dehumidification can be deactivated. X Turn the key to position 2 in the ignition

lock.

X Set the desired temperature. X To switch on: press the à rocker

switch up or down. The indicator lamp in the à rocker switch lights up.

X To switch off: press the K rocker

switch up or down. The indicator lamp in the à rocker switch goes out.

or X Set the air distribution using COMAND

(Y page 235). The indicator lamp in the à rocker switch goes out.

Setting the temperature

Climate control climate zones

Operating the control systems

259

You can select different temperature settings for the driver's and front-passenger sides as well as for the footwells. X Turn the key to position 2 in the ignition

lock.

X To increase/reduce: press the w

rocker switch up or down. Only change the temperature setting in small increments. Start at 72 ‡ (22 †). i You can also use COMAND to set the

temperature (Y page 234).

i The footwell temperature can be set via

COMAND (Y page 237).

Setting the air distribution Air distribution settings The air distribution can be set individually for the driver's and front-passenger sides. ¯ directs the airflow through the

defroster vents

P directs the airflow through the center

and side air vents

O directs the airflow through the footwell

air vents

S directs the airflow through the center

and side air vents, as well as the footwell air vents

a directs the airflow through the footwell

and defroster vents

_ directs the airflow through the

defroster, center and side air vents, as well as the footwell air vents

b directs the airflow through the center

and side air vents, as well as the defroster vents

W adjusts the air distribution

automatically

The air distribution can be set using COMAND (Y page 235).

260 Operating the control systems

Setting the airflow You can select different airflow settings for the driver's and front-passenger sides. X Turn the key to position 2 in the ignition

lock.

X To increase/reduce: press the K

rocker switch up or down.

You can also use COMAND to set the airflow (Y page 235).

Defrosting the windshield You can use this function to defrost the windshield or to defrost the inside of the windshield and the side windows. i You should only select the defrosting

function until the windshield is clear again.

X Turn the SmartKey to position 2 in the

ignition lock.

X To switch on: press the ¬ rocker

switch up or down. The indicator lamp in the ¬ rocker switch lights up. The climate control system switches to the following functions: Rcooling with air dehumidification on Rhigh airflow16
Rhigh temperature16
Rair distribution to the windshield and

front side windows

Rair-recirculation mode off

X To switch off: press the ¬ rocker

switch up or down. The indicator lamp in the ¬ rocker switch goes out. The previously selected settings come into effect again. The cooling with air dehumidification function remains on. Air-recirculation mode remains deactivated.

or X Press the w rocker switch up or down.

16 Depending on the outside temperature.

or X Press the K rocker switch up or down.

Maximum cooling MAX COOL The MAX COOL function is only available in vehicles for the USA. MAX COOL is only operational when the engine is running. The MAX COOL function is activated automatically: Rif climate control is set to automatic

(Ã) on both sides Rif additional cooling is used The display shows MAX COOL. This is the quickest way to cool the vehicle interior when the sliding sunroof and the side windows are closed.

Defrosting the windows Windows fogged up on the inside X Activate the "cooling with air

dehumidification" function via COMAND (Y page 236).

X Activate automatic mode Ã. X If the windows continue to fog up, activate

the defrosting function (Y page 260).

i You should only select this setting until

the windshield is clear again.

Windows fogged up on the outside X Activate the windshield wipers. X Activate automatic climate control. i You should only select this setting until

the windshield is clear again.

Rear window defroster Activating/deactivating G Warning Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others.

The rear window heating has a high current draw. You should therefore switch it off as soon as the window is clear as it only switches off automatically after several minutes. If the battery voltage is too low, the rear window heating may switch off. X Turn the SmartKey to position 2 in the

ignition lock.

X Press the ¤ rocker switch up or down.

The indicator lamp in the ¤ rocker switch lights up or goes out.

Problems with the rear window heating The rear window heating has deactivated itself prematurely or cannot be activated. X Switch off any consumers that are not required, e.g. reading lamps or interior lighting. When the battery is sufficiently charged, the rear window heating is activated again automatically.

Activating/deactivating air- recirculation mode You can deactivate the flow of fresh air if unpleasant odors are entering the vehicle from outside. The air already inside the vehicle will then be recirculated. G Warning Fogged windows impair visibility, endangering you and others. If the windows begin to fog on the inside, switching off the air recirculation mode immediately should clear interior window fogging. If interior

Operating the control systems

261

window fogging persists, make sure the air conditioning is activated, or press the ¬ button.

X Turn the SmartKey to position 2 in the

ignition lock.

X To activate: press the g rocker switch

up or down. The indicator lamp in the g rocker switch lights up.

i Air-recirculation mode is activated

automatically at high outside temperatures. The indicator lamp in the g rocker switch is not lit when automatic air-recirculation mode is activated. Outside air is added after about 30
minutes.

X To deactivate: press the g rocker

switch up or down. The indicator lamp in the g rocker switch goes out.

i Air-recirculation mode switches off

automatically: Rafter approximately five minutes if

outside temperatures are under about 41 ‡ (5 †)

Rafter approximately five minutes if cooling with air dehumidification is deactivated

Rafter approximately 30 minutes if outside

temperatures are over about 41 ‡ (5 †)

Switching the residual heat on/off It is possible to make use of the residual heat of the engine to continue heating the stationary vehicle for up to 30 minutes after the engine has been switched off. The heating time depends on the temperature that has been set. i The blower will run at a low speed

regardless of the airflow setting.

262 Setting the air vents

i If you activate the "residual heat" function at high temperatures, only the ventilation will be activated. The blower runs at medium speed.

X Turn the key to position 0 in the ignition

lock or remove it.

X To switch on: press the Ì rocker

switch up or down. The indicator lamp in the Ì rocker switch lights up.

X To switch off: press the Ì rocker

switch up or down. The indicator lamp in the Ì rocker switch goes out.

i Residual heat is deactivated

automatically: Rafter about 30 minutes Rwhen the ignition is switched on Rif the battery voltage drops Rif the coolant temperature is too low

Setting the air vents Important safety notes G Warning When operating the climate control, the air that enters the passenger compartment through the air vents can be very hot or very cold (depending on the set temperature). This could cause burns or frostbite to unprotected skin in the immediate area of the air vents. Always keep sufficient distance between unprotected parts of the body and the air vents. If necessary, use the air distribution adjustment to direct the air to air vents in the vehicle interior that are not in the immediate area of unprotected skin.

In order to ensure the direct flow of fresh air through the air vents into the vehicle interior, please observe the following notes: Rkeep the air inlet grille on the hood free of

blockages, such as ice, snow or leaves

Rnever cover the vents or air inlet and outlet

grilles in the vehicle interior.

i For virtually draft-free ventilation, adjust

the sliders of the air vents to the center position.

Setting the center air vents

: Fixed center air vent ; Center air vent, right = Center vent thumbwheel, right ? Center vent thumbwheel, left A Center air vent, left X To open/close: turn thumbwheels =

and ? up or down.

Setting the side air vents

X To open/close: turn thumbwheel = up or

down.

i Side window defroster vent : is never completely shut, even if side air vent ; is shut.

Setting the stowage-compartment air vent When automatic climate control is activated the stowage compartment can be ventilated, for instance to cool its contents. The level of airflow depends on the airflow and air distribution settings. The temperature of the air is approximately the same as that of the air flowing from the center air vents. ! Close the stowage compartment air vent

when heating mode is activated and activate "cooling with air dehumidification" if the outside temperature is high. Otherwise, temperature-sensitive items stored in the stowage compartment could be damaged.

Setting the air vents

263

! Close the air vent when heating the

vehicle. At high outside temperatures, open the air vent and activate the "cooling with air dehumidification" function. Otherwise, temperature-sensitive items stored in the glove box could be damaged.

X To open: turn thumbwheel : counter-

clockwise from position 3 to position 2. X To close: turn thumbwheel : clockwise

from position 2 to position 3.

Setting the rear-compartment air vents Setting the center vents in the rear compartment

X To switch the ventilation on/off: push

rocker switch down ; or up :.

Setting the air vent in the glove box When automatic climate control is activated, the glove box can be ventilated, for instance to cool its contents. The level of airflow depends on the airflow and air distribution settings.

: Rear-compartment air vent, left ; Rear-compartment air vent, right = Rear-compartment air vent thumbwheel,

right

? Rear-compartment air vent thumbwheel,

left

264 Setting the air vents

X To open/close: turn thumbwheels =

or ? to the right or left.

i Close the rear-compartment air vents when heating mode is activated, as no warm air flows through the rear- compartment air vents in the basic heating setting.

Vehicle equipment ............................ 266
Notes on breaking-in a new vehicle 266
Driving ............................................... 266
Automatic transmission ................... 274
Refueling ............................................ 281
Parking ............................................... 284
Driving tips ........................................ 287
Driving systems ................................ 291

265

266 Driving

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.

Notes on breaking-in a new vehicle The first 1000 miles (1500 km) The more you look after the engine when it is new, the happier you will be with its performance in the future. RDrive at varying vehicle speeds and engine speeds for the first 1000 miles (1500 km) for this reason.

RAvoid overstraining the vehicle during this

period, e.g. driving at full throttle.

RChange gear in good time, at the latest

when the tachometer needle is 2/3 of the way to the red area in the tachometer display.

RDo not manually shift to a lower gear to

brake the vehicle.

RIf possible, do not depress the accelerator

pedal past the point of resistance (kickdown).

ROnly select shift ranges 3, 2 or 1 when

driving slowly, e.g. in mountainous terrain. RIdeally, drive program E (on AMG vehicles:

drive program C) should be selected for driving the first 1000 miles (1500 km).

After 1000 miles (1500 km) you may gradually bring the vehicle up to full road and engine speeds.

Additional breaking-in notes for AMG vehicles: RFor the first 1000 miles (1500 km), do not

exceed a speed of 85 mph (140 km/h). ROnly allow the engine to briefly reach a maximum engine speed of 4500 rpm.

RShift gears in good time. i Also observe these breaking-in notes

when the vehicle's engine or axle gear have been replaced.

i Always observe the respective limit

speeds.

Driving Important safety notes G Warning Make sure absolutely no objects are obstructing the pedals' range of movement. Keep the driver's footwell clear of all obstacles. If there are any floormats or carpets in the footwell, make sure the pedals still have sufficient clearance. During sudden driving or braking maneuvers the objects could get caught between the pedals. You could then no longer brake or accelerate. This could lead to accidents and injury. G Warning On slippery road surfaces, never downshift in order to obtain braking action. This could result in drive wheel slip and reduced vehicle control. Your vehicle's ABS will not prevent this type of loss of control. G Warning It is dangerous to shift AUTOTRONIC out of parking position P or neutral position N if the engine speed is higher than idle speed. If your foot is not firmly on the brake pedal, the vehicle could accelerate quickly forward or in reverse. You could lose control of the vehicle and hit someone or something. Only shift into

gear when the engine is idling normally and when your right foot is firmly on the brake pedal.

! Warm up the engine quickly. Do not use the engine's full performance until it has reached operating temperature. Only shift the automatic transmission to the desired drive position when the vehicle is stationary. Where possible, avoid spinning the drive wheels when pulling away on slippery roads. You could otherwise damage the drive train.

! CL 63 AMG: at low engine oil

temperatures below 68 ‡ (+20 †), the maximum engine speed is restricted in order to protect the engine. To protect the engine and maintain smooth engine operation, avoid driving at full throttle when the engine is cold.

SmartKey positions SmartKey

g To remove the SmartKey 1 Power supply for some consumers, such

as the windshield wipers

2 Ignition (power supply for all consumers)

and drive position 3 To start the engine As soon as the ignition is switched on, all the indicator lamps in the instrument cluster light up. The indicator lamps of the high-beam

Driving 267

headlamps or the turn signal lamps only light up if the high-beam headlamps or the turn signal lamps are switched on. If an indicator lamp does not light up when the ignition is switched on, check it and replace it if necessary. If an indicator lamp does not go out after the engine is started or if it lights up while the vehicle is in motion, see (Y page 375). X Remove the SmartKey when the engine is

switched off. The battery may otherwise discharge.

If you cannot turn the SmartKey in the ignition lock, the vehicle battery may not be charged sufficiently. X Check the vehicle battery and charge if

necessary (Y page 428).

or X Jump-start the vehicle (Y page 429). i The SmartKey can be turned in the

ignition lock even if it is not the correct SmartKey for the vehicle. The ignition is not switched on. The engine cannot be started.

KEYLESS-GO Vehicles with KEYLESS-GO are equipped with a SmartKey with an integrated KEYLESS-GO function and a detachable Start/Stop button. The Start/Stop button must be inserted in the ignition lock and the SmartKey must be in the vehicle. Pressing the Start/Stop button several times in succession corresponds to the different key positions in the ignition lock. This is only the case if you are not depressing the brake pedal. If you depress the brake pedal and press the Start/Stop button, the engine starts immediately. The Start/Stop button can be removed from the ignition lock. Then you can insert the SmartKey in the ignition lock. i You do not have to remove the Start/Stop

button from the ignition lock when you

268 Driving

leave the vehicle. However, you should always take the SmartKey with you when leaving the vehicle. The vehicle can be started with the Start/Stop button and the electrical equipment can be operated while the SmartKey is in the vehicle.

X Position 0: if Start/Stop button : has not yet been pressed, this corresponds to the SmartKey being removed from the ignition.

X Position 1: press Start/Stop button :.

You can now activate the windshield wipers, for example.

i If you then open the driver's door when in

this position, the power supply is deactivated.

X Position 2 (ignition): press Start/Stop

button : twice.

i If you press Start/Stop button : once when in this position and the driver's door is open, the power supply is deactivated again.

As soon as the ignition is switched on, all the indicator lamps in the instrument cluster light up. The indicator lamps of the high-beam headlamps or the turn signal lamps only light up if the high-beam headlamps or the turn signal lamps are switched on. If an indicator lamp does not light up when the ignition is switched on, check it and replace it if necessary. If an indicator lamp does not go out after the engine is started or if it lights up while the vehicle is in motion, see (Y page 375).

Starting the engine Important safety notes G Warning Inhalation of exhaust gas is hazardous to your health. All exhaust gas contains carbon monoxide (CO), and inhaling it can cause unconsciousness and possible death. Do not run the engine in confined areas (such as a garage) which are not properly ventilated. If you think that exhaust gas fumes are entering the vehicle while driving, have the cause determined and corrected immediately. If you must drive under these

: Start/Stop button ; Ignition lock X Insert Start/Stop button : into ignition

lock ;.

i When you insert Start/Stop button :

into ignition lock ;, the system requires a detection time of two seconds before you can use Start/Stop button :.

X Shift the transmission to position P. X Do not press the brake pedal.

Start/Stop button = USA only ? Canada only

Driving 269

conditions, drive only with at least one window fully open at all times.

! Do not depress the accelerator pedal

when starting the engine.

X Depress the brake pedal and keep it

depressed.

X Press the Start/Stop button once

(Y page 267). The engine starts.

Automatic transmission X Shift the transmission to position P. i The transmission position display in the

multifunction display shows P.

Starting procedure with the SmartKey X Turn the SmartKey to position 3 in the

ignition lock (Y page 267) and release it as soon as the engine is running.

Using KEYLESS-GO to start the engine G Warning! As long as the SmartKey is in your vehicle, the vehicle can be started. Therefore, never leave children unattended in the vehicle, as they could otherwise accidentally start the engine. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. Do not leave children unattended in the vehicle, 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.

i The Start/Stop button can be used to

start the vehicle without inserting the SmartKey in the ignition lock. The SmartKey must be in the vehicle.

X The Start/Stop button must be inserted in

the ignition lock.

i To start the engine with the SmartKey instead of with KEYLESS-GO, remove the Start/Stop button from the ignition lock.

Pulling away Automatic transmission G Warning It is dangerous to shift AUTOTRONIC out of parking position P or neutral position N if the engine speed is higher than idle speed. If your foot is not firmly on the brake pedal, the vehicle could accelerate quickly forward or in reverse. You could lose control of the vehicle and hit someone or something. Only shift into gear when the engine is idling normally and when your right foot is firmly on the brake pedal.

i It is only possible to shift the transmission

from position P to the desired position if you depress the brake pedal. Only then is the parking lock released. If you do not depress the brake pedal, you can move the DIRECT SELECT selector lever but the parking lock remains engaged.

X Depress the brake pedal and keep it

depressed.

X Shift the transmission to position D or R. X Wait until the gear change is completed

before pulling away.

X Release the brake pedal. X Carefully depress the accelerator pedal.

The electric parking brake (Y page 285) is automatically released. The red F indicator lamp (USA only) or the red ! indicator lamp (Canada only) in the instrument cluster goes out.

i The vehicle locks centrally once you have pulled away. The locking knobs in the doors drop down.

270 Driving

You can open the doors from the inside at any time. You can also deactivate the automatic locking feature .

i Upshifts take place at higher engine

speeds after a cold start. This helps the catalytic converter to reach its operating temperature more quickly.

Hill start assist Hill start assist helps you when pulling away forwards or in reverse on an uphill gradient. It holds the vehicle for a short time after you have removed your foot from the brake pedal. This gives you enough time to move your foot from the brake pedal to the accelerator pedal and depress it before the vehicle begins to roll. G Warning Never leave the vehicle when it is held by hill start assist. After approximately one second, hill start assist will no longer brake your vehicle and it could roll away.

X Take your foot off the brake pedal. i Once you have taken your foot off the

brake pedal, the vehicle is held for around one second.

X Pull away. Hill start assist will not function if: Ryou are pulling away on a level road or a

downhill gradient.

Rthe transmission is in position N. Rthe electric parking brake is applied. RESP® is malfunctioning.

ECO start/stop function General notes The ECO start/stop function is only available for the CL 63 AMG. The ECO start/stop function is only available in drive program C.

The ECO start/stop function switches the engine off automatically when the vehicle stops moving. The engine starts automatically when you pull away again. The ECO start/stop function thereby helps you to reduce the fuel consumption and emissions of your vehicle.

: ECO symbol ; ECO start/stop display message The ECO start/stop function is activated each time the engine is switched on. If all the requirements are fulfilled for automatic engine switch-off (Y page 271), green ECO symbol : is shown in the multifunction display and Stop/Start active ; appears. If all the requirements are not fulfilled, ECO symbol : is shown in yellow and Stop/Start inactive ; appears. If the ECO start/stop function is deactivated (Y page 271), ECO symbol : is not shown. G Warning If the engine is switched off and the ECO symbol is shown in green in the multifunction display, the engine has been switched off automatically. All of the vehicle's systems remain active. If you open the door, unfasten your seat belt or remove your foot from the brake pedal, the engine will automatically start. The vehicle may begin moving. You could suffer serious or even fatal injury or cause an accident resulting in injury or death. Never leave the vehicle while the ECO symbol in the multifunction display is shown in green or yellow. Always secure the vehicle against rolling away before leaving it.

! Always switch the ignition off and take the

key with you when leaving the vehicle.

Automatic engine switch-off The ECO start/stop function switches the engine off automatically if the vehicle is braked to a standstill and the brake remains depressed with the transmission in position D or N. i You can still activate HOLD when the

vehicle is stationary, even if the engine has been switched off automatically. It is then not necessary to continue applying the brakes during the automatic stop phase. When you depress the accelerator pedal, the engine starts automatically and the braking effect of the HOLD function is deactivated. Depress the accelerator pedal carefully, as the engine must be started first.

The engine is only switched off if: Rthe outside temperature is within the range

which is suitable for the system. Rthe engine is at normal operating

temperature.

Rthe set temperature for the vehicle interior

has been reached.

Rthe battery is sufficiently charged. Rthe system detects that the windshield is not fogged up when the air-conditioning system is switched on.

Rthe hood is closed. Rno engine relevant diagnostics are active. Rthe driver's door is closed and the seat belt

is fastened.

Automatic engine start The engine is started automatically if you: Rrelease the brake pedal when HOLD is not

activated and the transmission is in position D or N

Rshift the transmission to position R Rdepress the accelerator pedal

Driving 271

Rswitch off the ECO start/stop function or

switch to drive program S or M

Runfasten your seat belt or open the driver's

door

The engine is also started automatically if: Rthe vehicle starts to roll. Rthe brake system requires this. Rthe system detects moisture on the windshield when the air-conditioning system is switched on.

Rthe temperature in the vehicle interior

deviates from the set range.

Rthe battery's condition of charge is too low.

Deactivating/activating the ECO start/ stop function General notes You can activate and deactivate the ECO start/stop function using COMAND (Y page 230). i You can also use the programmable button (Y page 109) to activate and deactivate the ECO start/stop function if you have assigned this function to the button.

Deactivating X Deactivate the ECO start/stop function using COMAND (Y page 230): The ECO symbol goes out and the Stop/ Start deactivated display message is shown in the multifunction display.

i If drive program S or M has been selected,

the ECO start/stop function is always deactivated.

Activating X Activate the ECO start/stop function using COMAND (Y page 230). The ECO symbol and the Stop/Start active display message is shown in the multifunction display.

272 Driving

If not all conditions for automatic engine switch-off (Y page 271) are fulfilled, the Stop/Start inactive message appears. i If you activate the ECO Start/Stop

function in the drive programs S or M, drive program C is selected automatically.

Driving 273

Problems with the engine Problem The engine does not start. The starter motor can be heard.

Possible causes/consequences and M Solutions RThere is a malfunction in the engine electronics. RThere is a malfunction in the fuel supply. X Turn the SmartKey back to position 0 in the ignition lock before

the next attempt to start with the SmartKey.

The engine does not start. You cannot hear the starter motor.

X Before the next starting attempt with KEYLESS-GO: shut all open

vehicle doors so that the signals from the SmartKey may be better received.

or X Pull the Start/Stop button out of the ignition. X Use the SmartKey to start the engine, (Y page 269) as external

radio signals cause KEYLESS-GO to malfunction. Avoid excessively long and frequent attempts to start the engine as these will drain the battery.

If the engine does not start after several attempts: X Consult a qualified specialist workshop. The on-board voltage is too low because the starter battery is too weak or discharged. X Jump-start the vehicle (Y page 429). If the engine does not start despite attempts to jump-start it: X Consult a qualified specialist workshop. The starter motor was exposed to a thermal load that was too high. X Allow the starter motor to cool down for approximately two

minutes.

X Try to start the engine again. If the engine still does not start: X Consult a qualified specialist workshop.

274 Automatic transmission

Problem The engine is not running smoothly and is misfiring.

The coolant temperature gauge shows a value above 248 ‡(120 †).

Possible causes/consequences and M Solutions There is a malfunction in the engine electronics or a mechanical component of the engine management system. X Only depress the accelerator pedal slightly. X Have the cause rectified immediately at a qualified specialist

workshop. Otherwise, non-combusted fuel may get into the catalytic converter and damage it.

The coolant level is too low. The coolant is too hot and the engine is no longer being cooled sufficiently. X Stop as soon as possible and allow the engine and the coolant

to cool down.

X Check the coolant level (Y page 407). Observe the warning

notes as you do so and add coolant if necessary.

Automatic transmission Important safety notes G Warning It is dangerous to shift AUTOTRONIC out of parking position P or neutral position N if the engine speed is higher than idle speed. If your foot is not firmly on the brake pedal, the vehicle could accelerate quickly forward or in reverse. You could lose control of the vehicle and hit someone or something. Only shift into gear when the engine is idling normally and when your right foot is firmly on the brake pedal. G Warning! Keep in mind that turning off the engine alone only will shift AUTOTRONIC into neutral position N automatically. Always shift AUTOTRONIC into park position P before turning off the engine. Otherwise the vehicle could roll away which could result in an accident and/or serious personal injury.

DIRECT SELECT lever Overview of transmission positions The DIRECT SELECT lever is on the right of the steering column.

P Park position with parking lock R Reverse N Neutral D Drive i The DIRECT SELECT lever always returns

to its original position. The current transmission position P, R, N or D appears in the transmission position display (Y page 276) in the multifunction display.

Engaging park position P X Push the DIRECT SELECT lever in the

direction of the arrow P.

i The automatic transmission shifts

automatically into park position P if you open the driver's door when the vehicle is stationary or at very low speed and the transmission is in position D or R.

! If the engine speed is too high or the

vehicle is moving, do not shift the automatic transmission directly from D to R, from R to D or directly to P. The automatic transmission could otherwise be damaged.

Engaging reverse gear R ! Only shift the automatic transmission to

R when the vehicle is stationary.

i The ECO start/stop function is not

available when reverse gear is engaged. For further information on the ECO start/ stop function (Y page 270).

X When the vehicle is stationary, depress the

brake pedal.

X Push the DIRECT SELECT lever up past the

first point of resistance.

Neutral N with ECO start/stop function activated The ECO start/stop function switches the engine off automatically when the vehicle is stationary if the vehicle is braked to a standstill with neutral N engaged and the brake depressed. For further information on the ECO start/stop function (Y page 270).

Shifting to neutral N X When the vehicle is stationary, depress the

brake pedal.

X Push the DIRECT SELECT lever up or down

to the first point of resistance.

Automatic transmission 275

When the engine is switched off, the automatic transmission shifts to N automatically. Remaining in neutral N If you wish to keep the automatic transmission in neutral N, e.g. to wash the vehicle in a car wash with a towing device, observe the following: G Warning! When leaving the SmartKey in the starter switch, do not leave children unattended in the vehicle. It is possible for children to switch on the ignition which could result in unsupervised use of vehicle equipment. Unsupervised use of vehicle equipment could result in an accident and/or serious personal injury.