2011 MERCEDES-BENZ CL-Class battery

Rear window defroster
Activating/deactivatingGWarning
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.
XTurn the SmartKey to position 2 in the
ignition lock.XPress 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.
XSwitch 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.
GWarning
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
window fogging persists, make sure the air
conditioning is activated, or press the ¬
button.XTurn the SmartKey to position 2 in the
ignition lock.XTo 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:
R after approximately five minutes if
outside temperatures are under about
41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after 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.
Operating the control systems261Climate controlZ

iIf you activate the "residual heat" function
at high temperatures, only the ventilation
will be activated. The blower runs at
medium speed.
XTurn the key to position 0 in the ignition
lock or remove it.
XTo switch on: press the Ì rocker
switch up or down.
The indicator lamp in the Ì rocker
switch lights up.
XTo switch off: press the Ì rocker
switch up or down.
The indicator lamp in the Ì rocker
switch goes out.
iResidual 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
GWarning
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.
iFor 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, leftACenter air vent, leftXTo open/close: turn thumbwheels =
and ? up or down.
Setting the side air vents
262Setting the air ventsClimate control

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
gTo remove the SmartKey1Power supply for some consumers, such
as the windshield wipers2Ignition (power supply for all consumers)
and drive position3To 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
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).XRemove 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.
XCheck the vehicle battery and charge if
necessary ( Y page 428).
or
XJump-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
Driving267Driving and parkingZ

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:
R the outside temperature is within the range
which is suitable for the system.
R the engine is at normal operating
temperature.
R the set temperature for the vehicle interior
has been reached.
R the battery is sufficiently charged.
R the system detects that the windshield is
not fogged up when the air-conditioning
system is switched on.
R the hood is closed.
R no engine relevant diagnostics are active.
R the driver's door is closed and the seat belt
is fastened.
Automatic engine start
The engine is started automatically if you:
R release the brake pedal when HOLD is not
activated and the transmission is in
position D or N
R shift the transmission to position R
R depress the accelerator pedal
Rswitch off the ECO start/stop function or
switch to drive program S or M
R unfasten your seat belt or open the driver's
door
The engine is also started automatically if:
R the vehicle starts to roll.
R the brake system requires this.
R the system detects moisture on the
windshield when the air-conditioning
system is switched on.
R the temperature in the vehicle interior
deviates from the set range.
R the 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
XDeactivate 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
XActivate 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.Driving271Driving and parkingZ

Problems with the engineProblemPossible causes/consequences and M SolutionsThe engine does not
start. The starter motor
can be heard.R There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.XTurn the SmartKey back to position 0 in the ignition lock before
the next attempt to start with the SmartKey.XBefore the next starting attempt with KEYLESS-GO: shut all open
vehicle doors so that the signals from the SmartKey may be
better received.
or
XPull the Start/Stop button out of the ignition.XUse 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:
XConsult a qualified specialist workshop.The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the starter battery is too
weak or discharged.XJump-start the vehicle ( Y page 429).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.The starter motor was exposed to a thermal load that was too high.XAllow the starter motor to cool down for approximately two
minutes.XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.Driving273Driving and parkingZ

lock is in position 1 or if the ignition is
switched on using the Start/Stop button.
Releasing the electric parking brake
automatically
The electric parking brake is released
automatically when the following conditions
are simultaneously fulfilled:
R the engine is running.
R the automatic transmission is in position
D or R.
R the hood is closed.
R your seat belt is fastened.
R you depress the accelerator pedal.
If the automatic transmission is in position
R , the trunk lid must be closed.
For the parking brake to be released
automatically if your seat belt is not fastened,
the following conditions must be fulfilled:
R the driver's door is closed.
R you shift out of P or you have previously
driven faster than 2 mph (3 km/h).
Engaging the electric parking brake
manually
XPush handle :.
The red F indicator lamp (USA only) or
the red ! indicator lamp (Canada only)
in the instrument cluster lights up.
i The electric parking brake can also be
applied even if the SmartKey has been
removed.
Engaging the electric parking brake
automatically
The electric parking brake is automatically
applied if HOLD or DISTRONIC PLUS brakes
the vehicle until it is stationary and at least
one of the following conditions is fulfilled:
R the engine is switched off.
R the driver's door is open and the seat belt
is not fastened.
R the hood is released.
R the trunk lid is opened while the automatic
transmission is in position R.
R the vehicle is stationary for a lengthy
period.
The red F indicator lamp (USA only) or the
red ! indicator lamp (Canada only) in the
instrument cluster lights up.
i In addition to the electric parking brake,
P may also be engaged automatically.
Emergency braking with the electric
parking brake
The vehicle can also be braked during an
emergency using the electric parking brake.
XWhile driving, push handle : of the electric
parking brake ( Y page 285).
i
The vehicle is braked as long as you keep
the handle of the electric parking brake
pressed. The longer the electric parking
brake handle is depressed, the greater the
braking force.
During braking:
R a warning tone sounds.
R the Release parking brake message
appears.
R red F indicator lamp (USA only) or
red ! indicator lamp (Canada only)
appears in the instrument cluster
When the vehicle has been braked to a
standstill, the electric parking brake is
engaged.
Parking up the vehicle
If you leave the vehicle parked up for longer
than four weeks, the battery may be damaged
by exhaustive discharge.
XDisconnect the battery or connect it to a
trickle charger.
i You can obtain information about trickle
chargers from a qualified specialist
286ParkingDriving and parking

if changing lanes takes too long or if the
distance between your vehicle and the
vehicle in front becomes too small.GWarning
DISTRONIC PLUS and Active Blind Spot Assist
are only aids designed to assist driving.
They do not relieve you of the responsibility
of paying attention. The driver remains fully
responsible for the vehicle's distance from
other vehicles, the vehicle's speed and for
braking in good time. Always pay attention to
traffic conditions and your surroundings.
Otherwise, you may fail to recognize dangers
in time, cause an accident and injure yourself
and others.
Stopping
GWarning
Never get out of the vehicle when DISTRONIC
PLUS is activated.
DISTRONIC PLUS must also never be
operated, activated or deactivated by a
passenger or from outside the vehicle.
DISTRONIC PLUS does not replace the
electric parking brake and must not be used
for parking.
The DISTRONIC PLUS braking effect is
canceled and the vehicle can start moving if:
R DISTRONIC PLUS is deactivated using the
cruise control lever.
R you accelerate.
R there is a malfunction in the system or an
interruption in the power supply, e.g.
battery failure.
R the electrical system in the engine
compartment, the battery or the fuses are
tampered with.
R the battery is disconnected.
If you wish to leave the vehicle or park it,
deactivate DISTRONIC PLUS and secure the
vehicle against rolling away.
If DISTRONIC PLUS detects that the vehicle
in front is stopping, it brakes your vehicle until
it is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress the
brake.
i After a time, the electric parking brake
secures the vehicle and relieves the service
brake.
i Depending on the specified minimum
distance, your vehicle will come to a
standstill at a sufficient distance behind the
vehicle in front. The specified minimum
distance is set using the control on the
cruise control lever.
Setting a speedGWarning
Keep in mind that it may take a brief moment
until the vehicle has made the necessary
adjustments.
Increase or decrease the set vehicle speed to
a value that the prevailing road conditions and
legal speed limits permit. Otherwise, sudden
and unexpected acceleration or deceleration
of the vehicle could cause an accident and/
or serious injury to you and others.
XPress the cruise control lever to the
pressure point, up : for a higher speed or
down ; for a lower speed.XKeep the cruise control lever pressed until
the desired speed is reached.XRelease the cruise control lever.
The new speed is stored. DISTRONIC PLUS
is activated and adjusts the vehicle's speed
to the new speed stored.
Setting in 1 mph (Canada: 1 km/h)
increments
XBriefly press the cruise control lever to the
pressure point, up : for a higher speed or
down ; for a lower speed.
The last speed stored is increased or
reduced.298Driving systemsDriving and parking

HOLD function
General notes
The HOLD function can assist the driver in the
following situations:
Rwhen pulling away, especially on steep
slopes
Rwhen maneuvering on steep slopes
Rwhen waiting in traffic
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
Activation conditions
You can activate the HOLD function if:
Rthe vehicle is stationary.
Rthe driver's door is closed or if your seat
belt is fastened.
Rthe electric parking brake is released.
Rthe hood is closed.
Rthe transmission is in position R, N or D.
The trunk lid must be closed in position R.
RDISTRONIC PLUS is deactivated.
Activating the HOLD function
XMake sure that the activation conditions
are met.
XDepress the brake pedal.XQuickly depress the brake pedal further
until HOLD display : appears in the
instrument cluster.
The HOLD function is activated. You can
release the brake pedal.
iIf depressing the brake pedal the first
time does not activate the HOLD function,
wait briefly and then try again.
GWarning
The vehicle's brakes are applied when the
HOLD function is activated. For this reason,
deactivate the HOLD function if the vehicle is
to be set in motion by other means (e.g. in a
car wash or by towing).
Deactivating the HOLD function
The HOLD function is deactivated
automatically if:
Ryou accelerate and the transmission is in
position D or R.
Rthe transmission is in position P.
Ryou apply the brakes again with a certain
amount of pressure until HOLD disappears
from the instrument cluster.
Ryou secure the vehicle using the electric
parking brake.
Ryou activate DISTRONIC PLUS.
iAfter a time, the electric parking brake
secures the vehicle and relieves the service
brake.
GWarning
Never get out of the vehicle when the HOLD
function is activated.
The HOLD function must never be operated
or deactivated by a passenger or from outside
the vehicle.
The HOLD function does not replace the
electric parking brake and must not be used
for parking.
The braking effect of the HOLD function is
canceled and the vehicle could roll away if:
Rthe HOLD function is deactivated by
depressing the accelerator pedal or the
brake pedal.
Rthere is a malfunction in the system or an
interruption in the power supply, e.g.
battery failure.
Driving systems303Driving and parkingZ