ignition MERCEDES-BENZ CLS COUPE 2010 Service Manual

the vehicle could skid. Thi
scould cause you
to lose control of your vehicle and cause an
accident.
! Warm up the engine quickly. Do not use
the engine's full performance until it has
reached operating temperature.
Only set the automatic transmission to the
respective drive positions when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. Otherwise, you could damage the
drive train.
! AMG vehicles: at low engine oil tempera-
tures (below +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. Key positions
Key g
To remove the key
1 Power supply for some consumers, such
as the windscreen wipers
2 Ignition (power supply for all consumers)
and drive position
3 Starting the engine
i The key can be turned in the ignition lock
even if it is not the correc tkey for the vehi- cle. Then, the ignition is not switched on.
The engine cannot be started.
KEYLESS-GO General notes
Vehicles with KEYLESS-GO are equipped with
a key featuring an integrated KEYLESS-GO
function and a detachable Start/Stop button.
The Start/Stop button must be inserted into
the ignition lock and the key 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 immedi-
ately.
X
Position 0: if Start/Stop button :has not
yet been pressed, this corresponds to the
key being removed from the ignition.
X Position 1: press Start/Stop button :.
You can now activate the windscreen wip-
ers, for example.
i If you then open the driver's door when in
this position, the power supply is deactiva-
ted.
X Position 2(ignition): press Start/Stop but-
ton :twice.
i If you press Start/Stop button :once
when in this position and the driver's door Driving
129Driving and parking Z

is open, the power supply is deactivated
again.
Removing the Start/Stop button
You can remove the Start/Stop button from
the ignition lock and start the vehicle as nor-
mal using the key.
i You do not have to remove the Start/Stop
button from the ignition lock when you
leave the vehicle. X
Remove Start/Stop button :fromi gnition
lock ;.
i When you insert Start/Stop button :
into ignition lock ;, the system needs
approximately two seconds recognition
time before you can use Start/Stop but-
ton :. Starting the engine
Important safety notes G
Risk of poisoning
Never leave the engine running in enclosed
spaces. The exhaust gases contain carbon
monoxide. Inhaling exhaust fumes consti-
tutes a health hazard and could lead to loss
of consciousness or even death.
! Do not depress the accelerator pedal
when starting the engine. Automatic transmission X
Shift the transmission to position P.
The transmission position display in the
multifunction display shows P.
i You can also start the engine when the
transmission is in position N.
Starting procedure with the key i
To start the engine using the key instead
of KEYLESS-GO, pull the Start/Stop button
out of the ignition lock.
X To start a petrol engine: turn the key to
position 3in the ignition lock
(Y page 129) and release it as soon as the
engine is running.
X To startad iesel engine: turn the key to
position 2in the ignition lock
(Y page 129).
The % preglow indicator lamp in the
instrumen tcluster lights up.
X When the %preglow indicator lamp
goes out, tur nthe key to position 3
(Y page 129) and release it as soon as the
engine is running.
i You can start the engine without preglow
if the engine is warm.
i You can also use the touch-start function.
To do this, turn the key to position 3
(Y page 129) and release it immediately.
The engine then starts automatically.
Using KEYLESS-GO to startt he engine G
Risk of injury
You rvehicle can be started using a valid KEY-
LESS-GO key. For this reason, children should
never be left unsupervised in the vehicle.
Always take the key with you when leaving the
vehicle, even if you are only leaving it for a
short time.
i The Start/Stop button can be used to
start the vehicle manually without inserting
the key into the ignition lock. The key must 130
DrivingDriving and parking

be in the vehicle and the Start/Stop button
must be inserted in the ignition lock .This
mode for starting the engine operates inde-
pendently of the ECO start/stop automatic
engine start function.
X Depress the brake pedal and keep it
depressed.
X To startap etrol engine: press the Start/
Stop button (Y page 129) once.
The engine starts.
X To start adiesel engine: press the Start/
Stop button (Y page 129) once.
Preglow is activated and the engine starts. Pulling away
Automatic transmission i
It is only possible to shift the transmission
from position Pto the desired position if
you depress the brake pedal. Only then is
the parking lock released.
X Depress the brake pedal and keep it
depressed.
X Shif tthe transmission to position Dor R.
X Release the parking brake (Y page 148).
X Release the brake pedal.
X Carefully depress the accelerator pedal.
i The vehicle locks centrally once you have
pulled away.T he locking knobs in the doors
drop down.
You can open the doors from the inside at
any time.
You can also deactivate the automatic lock-
ing feature (Y page 209).
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 starta ssist 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
Risk of accident
Never leave the vehicle when it is held by hill
start assist. After approximately one second,
hill start assist will no longer brake your vehi-
cle 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:
R you are pulling away on a level road or a
downhill gradient.
R the transmission is in position N.
R the parking brake is applied.
R ESP ®
is malfunctioning. ECO start/stop function
General notes The ECO start/stop function is only available
for the CLS 350 BlueEFFICIENCY and
CLS 63 AMG models.
AMG vehicles:
the ECO start/stop function
is only available in the Cdrive program.
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 con-
sumption and emissions of your vehicle. Driving
131Driving and parking Z

:
ECO symbo lfor CLS 350 BlueEFFICIENCY :
ECO symbol for CLS 63 AMG
; ECO start/stop display message for
CLS 63 AMG
The ECO start/stop function is activated each
time the engine is switched on. If all condi-
tions for automatic engine switch-off are ful-
filled (Y page 132), ECO symbol :is shown
in green in the multifunction display.
AMG vehicles: the AMG menu in the multi-
function display additionally shows Stop/Start active message
;.
If not all conditions are fulfilled, ECO sym-
bol :is shown in yellow.
AMG vehicles: the AMG menu in the multi-
function display additionally shows Stop/Start inactive message
;.
If the ECO start/stop function is deactivated
(Y page 133), ECO symbol :is not shown.
AMG vehicles: the AMG menu in the multi-
function display additionally shows Stop/Start deactivated message
;. G
Risk of accident and injury
If the engine is switched off and the ECO sym-
bol is shown in green in the multifunction dis-
play, the engine has been switched off auto-
matically. 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.T
he
vehicle may begin moving. You could suffer
serious or even fatal injury or cause an acci-
dent 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 vehi-
cle is stationary, even if the engine has
been switched off automatically .Itis 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 deac-
tivated. 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 temper-
ature.
R the set temperature for the vehicle interior
has been reached.
R the battery is sufficiently charged.
R the system detects that the windscreen is
not misted up when the air-conditioning
system is switched on.
R the bonnet is closed.
R the front door is closed and the seat belt is
fastened. 132
DrivingDriving and parking

Problems with the engine
Problem Possible causes/consequences and
M Solutions
The engine does not
start. The HOLD function or DISTRONIC PLUS is activated.
X
Deactivate the HOLD function (Y page 165) or DISTRONIC
PLUS (Y page 154).
X Try to start the engine again. The 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.
X Before attempting to start the engine again, turn the key in the
ignition back to position 0or press the Start/Stop button
repeatedly until all indicator lamps in the instrumen tcluster go
out.
X Try to start the engine again (Y page 130). Avoid excessively
long and frequent attempts to start the engine as this will drain
the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop, e.g. a Mercedes-Benz
Service Centre. The engine does not
start
.The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge display shows 0. The fuel tank is empty.
X
Refuel the vehicle. 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.
X
Jump-start the vehicle (Y page 294).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop, e.g. a Mercedes-Benz
Service Centre. 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, e.g. a Mercedes-Benz
Service Centre. 134
DrivingDriving and parking

Problems with the transmission
Problem Possible causes/consequences and
M Solutions
The transmission has
problems shifting gear. The transmission is losing oil.
X
Have the transmission checked at a qualified specialist work-
shop, e.g. a Mercedes-Benz Service Centre, immediately. The acceleration ability
is deteriorating.
The transmission no
longer changes gear. The transmission is in emergency mode.
It is only possible to shift into
secondgear and reverse gear.
X Stop the vehicle.
X Shift the transmission to position P.
X Switch off the engine.
X Wait at least 10 seconds before restarting the engine.
X Shift the transmission to position Dor R.
If D is selected, the transmission shifts into secondgear; ifRis
selected, the transmission shifts into reverse gear.
X Have the transmission checked at a qualified specialist work-
shop, e.g. a Mercedes-Benz Service Centre, immediately. Refuelling
Important safety notes
G
Risk of explosion
Fuel is highly flammable. Fire, naked flames
and smoking are therefore prohibited when
handling fuels.
Switch off the engine and the auxiliary heating
before refuelling. G
Risk of injury
Do not come into contact with fuels.
It is hazardous to your health if your skin
comes into direct contact with fuels or you
breathe in fuel vapours. G
Risk of fire
Do not use petrol to refuel vehicles with a die-
sel engine. Do not mix diesel with petrol. This
would result in damage to the fuel system and
engine, which could lead to a vehicle fire.
! Do not use petrol to refuel vehicles with a
diesel engine. Do not use diesel to refuel vehicles with a petrol engine. Even a small
quantity of the wrong fuel will damage the
fuel system and engine.
! Do not switch on the ignition if you acci-
dentally refuel with the wrong fuel. Other-
wise, the fuel will enter the fuel lines. Notify
a qualified specialist workshop and have
the fuel tank and fuel lines drained com-
pletely. Petrol (EN 228)
Fuel grade !
Only refuel using unleaded premium-
grade petrol with at least
95 RON/85 MON, which conforms to Euro-
pean standard EN 228 or an equivalent
specification.
! Do not use the following:
R E85 (petrol with 85 % ethanol)
R E100 (100 % ethanol)
R M15 (petrol with 15 % methanol) 142
RefuellingDriving and parking

Problems with the fuel and fuel tank
Problem Possible causes/consequences and
M Solutions
Fuel is leaking from the
vehicle.
G
Risk of explosion or fire
The fuel line or the fuel tank is defective.
X Turn the key to position 0(Ypage 129) in the ignition lock
immediately and remove it.
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The fuel filler flap can-
not be opened. The fuel filler flap is not unlocked.
or
The key batteries are discharged.
X
Unlock the vehicle using the emergency key element
(Y page 69).
X Open the boot lid.
X Manually unlock the fuel filler flap using the emergency release
(Y page 145). 146
RefuellingDriving and parking

Problem Possible causes/consequences and
M Solutions
The fuel filler flap is unlocked, but the opening mechanism is jam-
med.
X
Consult a qualified specialist workshop. The engine will not
start. The fuel tank of a vehicle with a diesel engine has been run com-
pletely dry.
X Refuel the vehicle with at least 5litres of diesel.
X Turn the ignition on for at least 10 seconds (Y page 129).
X Start the engine continuously for up to 10 seconds until it runs
smoothly.
or
X Start the engine via the touch-star tfunction .To do this, turn the
key to position 3(Ypage 129) in the ignition lock and then
release it immediately.
If the engine does not start:
X Turn the ignition on again for approximately 10 seconds
(Y page 129).
X Start the engine again continuously for up to 10 seconds until
it runs smoothly.
or
X Start the engine again via the touch-start function.
If the engine does not start after three attempts:
X Consult a qualified specialist workshop. Parking
Important safety notes
G
Risk of accident
Only remove the key from the ignition lock
when the vehicle is stationary, as you cannot
steer the vehicle when the key is removed.
Never leave children unsupervised in the vehi-
cle. They could release the parking brake. This
could lead to a serious or fatal accident. G
Risk of fire
Under no circumstances should the exhaust
system come into contact with flammable
materials such as dry grass or petrol, for
example. Do not park the vehicle on dry grass- land or harvested grain fields. The hot exhaust
system could otherwise ignite the flammable
material and set the vehicle on fire.
To ensure that the vehicle is secured against
rolling away unintentionally:
R the parking brake must be applied.
R the transmission must be in position Pand
the key must be removed from the ignition
lock.
R on steep uphill or downhill gradients, turn
the front wheels towards the kerb. Parking
147Driving and parking Z

Switching off the engine
Important safety notes G
Risk of accident
If the engine is not running, there is no power
assistance for the steering and brakes. Steer-
ing and braking then requires significantly
greater effort.
As a result, you might lose control of the vehi-
cle, cause an accident and injure yourself and
others.
Therefore, do not switch off the engine while
you are driving.
Vehicles with automatic transmission X
Apply the parking brake firmly.
X Standard vehicles: shift the transmission
to P. Selector lever in AMG vehicles with P button
X AMG vehicles: pressPbutton :.
Using the key
X Turn the key to position 0in the ignition
lock and remove it.
The immobiliser is activated.
i If you switch the engine off with the trans-
mission in position Ror D, the automatic
transmission shifts to Nautomatically.
If you then open the driver's door or the
front-passenger door or remove the key
from the ignition, the automatic transmis-
sion shifts to P. If you shift the automatic transmission to
N
before switching off the engine, the auto-
matic transmission remains in Neven when
a door is opened.
Using KEYLESS-GO
X Press the Start/Stop button (Y page 129).
The engine stops and all the indicator
lamps in the instrumen tcluste rgo out.
i When the driver's door is closed, this cor-
responds to key position 1. When the driv-
er's door is open, this corresponds to key
position 0, "key removed".
i If you use the Start/Stop button to switch
off the engine, the automatic transmission
shifts to Nautomatically. If you then open
the driver's or front-passenger door, the
automatic transmission shifts to P.
i The engine can be turned off while the
vehicle is in motion by pressing and holding
the Start/Stop button for three seconds.
This function operates independently from
the ECO start/stop automatic engine
switch-off function. Parking brake148
ParkingDriving and parking

Make sure when parking that you position
your vehicle so that it does not make con-
tact with the kerb as the vehicle is lowered.
Your vehicle could otherwise be damaged.
Setting the vehicle level
Select the "Normal" setting for normal road
surfaces and "Raised" for driving with snow
chains or on particularly poor road surfaces.
Your selection remains stored even if you
remove the key from the ignition lock. G
Risk of injury
Make sure that nobody is in the vicinity of the
wheel housing or under the vehicle while low-
ering the vehicle when it is stationary. Other-
wise, limbs could become trapped. Setting raised level
X
Start the engine.
If indicator lamp ;is not lit:
X Press button :.
Indicator lamp ;lights up. The vehicle
height is adjusted to raised level.
The Vehicle rising message appears in
the display.
The "Raised Level" setting is cancelled if you:
R drive at a speed over approximately
120 km/h
R drive for approximately three minutes at a
speed over 80 km/h
The "Raised Level" remains saved when you
are not driving within these speed ranges. Setting the normal level
X
Start the engine.
If indicator lamp ;is lit:
X Press button :.
Indicator lamp ;goes out. The vehicle is
adjusted to normal level.
Suspension tuning General notes
The electronically controlled damping system
works continuously.T
his improves driving
safety and ride comfort.
The damping is tuned individually to each
wheel and depends on:
R your driving style, e.g. sporty
R the road surface condition,e .g. bumps
R your individual selection, i.e .sports or com-
fort
Your selection remains stored even if you
remove the key from the ignition lock. Sports tuning
The firmer suspension tunin
ginSport mode
ensures even better contact with the road.
Select this mode when employing a sporty
driving style, e.g. on winding country roads.
X Press button :.
Indicator lamp ;lights up. You have selec-
ted "Sports tuning".
The AIRMATIC SPORT message appears in
the multifunction display. 168
Driving systemsDriving and parking