ignition MERCEDES-BENZ C-CLASS COUPE 2011 Service Manual

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 th eStart/Stop button
ou toft he ignition lock.
X To start a petrol engine: turn the key to
position 3in the ignition lock
(Y page 137) 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 137).
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 137) and release it as soon as the
engine is running.
i You can start the engine without preglow
if the engine is warm.
i Vehicles with automatic transmis-
sion: you can also use the touch-start func-
tion. To do this, turn the key to position 3
(Y page 137) and release it immediately.
The engine then starts automatically.
Using KEYLESS-GO to startt he engineG
WARNING
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
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 star tapetrol engine: press the Start/
Stop button (Y page 137) once.
The engine starts.
X To start adiesel engine: press the Start/
Stop button (Y page 137) once.
Preglow is activated and the engine starts. Pulling away
Manual transmission X
Depress the brake pedal and keep it
depressed.
X Fully depress the clutch pedal.
X Shift to either first gear or reverse gear R.
X Release the parking brake (Y page 159).
X Release the brake pedal.
X Slowly release the clutch pedal and gently
depress the accelerato rpedal.
! Change gear in good time and avoid spin-
ning the wheels. Otherwise, you could dam-
age the vehicle.
i Follow the shift recommendations in the
multifunction display for an economical
driving style (Y page 145).
i The vehicle locks centrally once you have
pulled away. The 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 226). Driving
139Driving and parking Z

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. The
vehicle may begi nmoving. 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 engine is only switched off if:
R
the outside temperature is within the range
that 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 vehicle is not being steered.
R the driver's door is closed and the seat belt
is fastened.
i The engine can be switched off automat-
ically a maximum of four times (initial stop
and three repeats) in succession .The ECO
symbol is shown in yellow in the multifunc-
tion display after the engine has been star-
ted automatically for the fourth time. The
engine can only be switched off automati-
cally again when the ECO symbol is shown
in green in the multifunction display.
i During an automatic engine switch-off, air
conditioning is reduced. If full air condition-
ing is required, the ECO start/stop function can be switched off with the ECO button
(Y
page 142).
Vehicles with manual transmission The ECO start/stop function switches off the
engine automatically at low speeds.
X
Brake the vehicle until it comes to a stand-
still.
X Engage neutral N(Ypage 145) (follow
gearshift instruction :to engage neutral
N, if necessary).
X Release the clutch pedal.
The engine is switched off automatically.
Vehicles with automatic transmission
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. Driving
141Driving and parking Z

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 177) or DISTRONIC
PLUS (Y page 164).
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 tcluste rgo
out.
X Try to start the engine again (Y page 138). 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.T
he 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 battery is too weak
or discharged.
X
Jump-start the vehicle (Y page 329).
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. Driving
143Driving and parking Z

Selector lever
Overview of transmission positions Selector lever (example)
P
Park position with selector lever lock
R Reverse gear
N Neutral
D Drive
Transmission position and drive pro-
gram display :
Transmission position display
; Drive program display
The current transmission position and drive
program appear in the multifunction display. Transmission positions
B
Park position
Prevents the vehicle from rolling
away when stopped. Do not shift
the transmission into position
P
(Y page 158) unless the vehicle is
stationary.
The key can only be removed if the
transmission is in position P. If the
key is removed from the ignition
lock, the selector lever is locked. C
Reverse gear
Only shift the transmission to
R
when the vehicle is stationary. A
Neutral
Do not shift the transmission to
N
while driving. Otherwise, the auto-
matic transmission could be dam-
aged.
Releasing the brakes will allow you
to move the vehicle freely, e.g. to
push it or tow it.
If ESP ®
is deactivated or faulty:
only shift the transmission to posi-
tion Nif the vehicle is in danger of
skidding, e.g. on icy roads.
! Rolling in neutral Ncan lead to
damage to the transmission. 7
Drive
The automatic transmission
changes gear automatically. All
forward gears are available.
Changing gear
The automatic transmission shifts to the indi-
vidual gears automatically when it is in trans-
mission position D.This automatic gearshift-
ing behaviouri s determined by:
R a shift range restriction, if selected
R the selected drive program (Y page 147)146
Automatic transmissionDriving and parking

G
WARNING
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 small
amounts of the wrong fuel result in damage
to the fuel system and the engine.
! Do not switch on the ignition if you acci-
dentally refuel with the wrong fuel .Other-
wise, the fuel will ente rthe fuel lines. Notify
a qualified specialist workshop and have
the fuel tank and fuel lines drained com-
pletely. Petrol (EN 228, DIN 51626)
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)
R M85 (petrol with 85% methanol)
R M100 (100% methanol)
R Diesel
Do not mix these fuels with petrol, and do
not use any additives. Otherwise, this can
lead to damage to the engine. This does not
include additives for the removal and pre-
vention of residue build-up. Only additives
recommended by Mercedes-Ben zmay be
added to petrol. More informatio nabout
recommended additives can be obtained
from any Mercedes-Benz Service Centre. !
Use a filter when adding fuel from a fuel
can. The fuel lines and/or the diesel injec-
tion system could otherwise be blocked by
particles from the fuel can.
i If the recommended fuel is not available,
but only as a temporary measure, you may
also use regular unleaded petrol,
91 RON/82.5 MON. This may reduce
engine performance and increase fuel con-
sumption .Avoid driving at full throttle.
In some countries, the fuel grade available
may not be adequate and could cause
deposits to build up. In such cases, and in
consultation with a Mercedes-Benz Service
Centre, the petrol may be mixed with the
additive recommended by Mercedes-Benz
(part number A000989254510). You must
observe the notes and mixing ratios speci-
fied on the container.
For further information on "Fuel", see
(Y page 354).
AMG vehicles and 12-cylinder engines !
Only refuel using super-grad eunleaded
petrol with at least 98 RON/88 MON,
which conforms to European standard EN
228 or equivalent.
You can otherwise impai rengine outpu tor
damage the engine.
i If the recommended fuel is not available
and only as a temporary measure, you may
also use premium-grade unleaded petrol,
95 RON/85 MON. This may reduce engine
performance and increase fuel consump-
tion. Avoid driving at full throttle.
! In emergencies, and only if the recom-
mended fuel is not available, you may also
use standard unleaded petrol, 91 RON/
82.5 MON.
However, using this fuel results in consid-
erably higher petrol consumption and sig-
nificantly reduced engine performance.
Avoid driving at full throttle. Refuelling
153Driving and parking Z

Flow improver
Flow improvers can be added to improve the
cold resistance of diesel fuel .The effective-
ness of a flow improver is not guaranteed with
every fuel.
Correct dosage and thorough mixing are deci-
sive factors in ensuring improvement in low-
temperature resistance. Under certain cir-
cumstances, an excessive dosage may
actually decrease low-temperature resist-
ance and should therefore be avoided. Follow
the manufacturer's dosing instructions.
Mix the additive with the diesel in good time,
before the flow properties of the diesel
become inadequate. Malfunctions can other-
wise only be rectified by heating the entire
fuel system, e.g. by parking the vehicle in a
heated garage.
Observe the information provided by the man-
ufacturer when using a flow improver. Only
use flow improvers that have been tested and
approved by Mercedes-Benz. You can obtain
further information from any Mercedes-Benz
Service Centre. Refuelling
Fuel filler flap The fuel filler flap is unlocked or locked auto-
matically when you open or close the vehicle
with the key or using KEYLESS-GO.
The position of the fuel filler cap is displayed
in the instrument cluster 8.The arrow
next to the filling pump indicates the side of
the vehicle. :
To open the fuel filler flap
; To insert the fuel filler cap
= Tyre pressure table
? Fuel type
Opening X
Switch off the engine.
X Remove the key from the ignition lock.
KEYLESS-GO: open the driver's door. This
switches the ignition to position 0, which
corresponds to having removed the key.
The driver's door can be closed again.
X Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap opens slightly.
X Open the fuel filler flap.
X Turn the fuel filler cap anti-clockwise and
remove it.
X Insert the fuel filler cap into the holder
bracket on the inside of filler flap ;.
X Completely insert the pump nozzle into the
filler neck and refuel.
X Only fill the tank until the pump nozzle
switches off.
! Overfilling the fuel tank could damage the
fuel system.
Closing X
Replace the fuel filler cap and turn it clock-
wise. The fuel filler cap audibly engages.
X Close the fuel filler flap. Refuelling
155Driving and parking Z

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 faulty.
X Turn the key to position 0(Y page 137) in the ignition lock
immediately and remove it.
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The engine does 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 five litres of diesel.
X Turn the ignition on for at least 10 seconds (Y page 137).
X Start the engine continuously for up to 10 seconds until it runs
smoothly.
If the engine does not start:
X Turn the ignition on again for approximately 10 seconds
(Y page 137).
X Start the engine again continuously for up to 10 seconds until
it runs smoothly.
If the engine does not start after three attempts:
X Consult a qualified specialist workshop. The fuel filler flap can-
not be opened. The fuel filler flap is not unlocked.
or
The key battery is discharged.
X
Unlock the vehicle (Y page 78).
or
X Unlock the vehicle using the emergency key element
(Y page 80). The fuel filler flap is unlocked, but the opening mechanism is jam-
med.
X
Consult a qualified specialist workshop. Refuelling
157Driving and parking Z

Parking
Important safety notes
G
WARNING
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
WARNING
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 on vehicles with manual transmission,
engage first gear or reverse gear.
R on vehicles with automatic transmission,
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. Switching off the engine
Important safety notes G
WARNING
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 manual transmission X
Shift to either first gear or reverse gear R.
X Turn the key to position 0in the ignition
lock and remove it.
The immobiliser is activated.
X Apply the parking brake firmly.
Vehicles with automatic transmission X
Apply the parking brake firmly.
X Shift the transmission to position P.
Using the key
X Turn the key to position 0in the ignition
lock and remove it.
The immobiliser is activated.
i The key can only be removed if the trans-
mission is in position P.
Using KEYLESS-GO
X Press the Start/Stop button (Y page 137).
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, i.e. key removed.
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 of the
ECO start/stop automatic engine switch-
off function. 158
ParkingDriving and parking

G
WARNING
Make sure that no persons or animals are in
the manoeuvring range. Otherwise, they
could be injured.
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates visually and
audibly the distance between yourv ehicle
and an object.
PARKTRONIC is activated automatically when
you:
R switch on the ignition
R shift to position D,Ror Non vehicles with
automatic transmission
R release the parking brake
PARKTRONIC is deactivated at speeds above
18 km/h. It is reactivated at lower speeds.
PARKTRONIC monitors the area around your
vehicle using six sensors in the fron tbumper
and four sensors in the rear bumper. :
Sensors in the front bumper, left-hand
side (example)
Range of the sensors General notes
The sensors must be free of dirt, ice and
slush; otherwise, they may no
tfunction cor-
rectly. Clean the sensor sregularly, taking
care not to scratch or damage them
(Y page 309). Side view
Top view
Front sensors
Centre approximately 100 cm
Corners approximately 60 cm
Rear sensors
Centre approximately 120 cm
Corners approximately 80 cm
!
When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars. PARK-
TRONIC does not detec tsuch objects when
they are in the immediat evicinity of the
vehicle. You could damage the vehicle or
the objects.
The sensors may not detect snow and
objects which absorb ultrasonic sources.
Ultrasonic sources, such as an automatic
car wash, a lorry's compressed-air brakes
or a pneumatic drill, could cause PARK-
TRONIC to malfunction. 180
Driving systemsDriving and parking

Deactivating/activating PARKTRONIC
:
Indicator lamp
; To deactivate/activate PARKTRONIC
If indicator lamp :lights up, PARKTRONIC is
deactivated. Parking Guidance is also deacti-
vated.
i PARKTRONIC is automatically activated
when you turn the key to position 2in the
ignition lock.
Trailer towing PARKTRONIC is deactivated fo
rthe rear area
when you establish an electrical connection
between your vehicle and a trailer.
! Fold in the ball coupling if the trailer tow
hitch is not required. PARKTRONIC meas-
ures the minimum detection range to an
obstacle from the bumper, not the ball cou-
pling. 182
Driving systemsDriving and parking