ignition MERCEDES-BENZ C-CLASS SALOON 2007 Manual Online

Troubleshooting
29
7 Problem Possible cause/consequence Suggested solutions
The engine cannot be started
using the key. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating* or interio r
lighting, and try to start the engine again.
If this does not work :
X Check the starter battery and recharge it if necessary
(Y page 326).
or
X Jump-start the vehicle (Y page 328).
or
X Consult a qualified specialist workshop. The engine cannot be started
using the key. The steering lock is mechanically
blocked. X
Remove the key and reinsert it into the ignition lock. At the sam e
time, turn the steering wheel in both directions. Practical advice
* optional
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Troubleshooting
29
9 Problem Possible cause/consequence Suggested solutions
The vehicle cannot be started
using the KEYLESS GO key and
the KEYLESS GO button. The KEY-
LESS GO key is in the vehicle. A door is open. The key therefore
cannot be detected so easily. X
Close the door and try to start the vehicle again . You did not depress the brak
e
when starting the engine. X
Depress the brake pedal and press the KEYLESS GO button. There is interference from a pow-
erful source of radio waves
. X
Start your vehicle using the KEYLESS GO key in the ignition lock. You have lost the KEYLESS GO
key
. X
Have the KEYLESS GO key cancelled at a Mercedes-Benz Service
Centre.
X Report the loss immediately to the vehicle insurers .
X If necessary, have the manual locks changed too. Parking up the vehicle
Proble
m Possible cause/consequence Suggested solutions
The vehicle is to be left parked up
for longer than six weeks. X
Visit a qualified specialist workshop and seek advice.
X Disconnect the battery (Y page 326). Practical advice
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Locking/unlocking in an emergency
300 Locking/unlocking in an emergency
Emergency key
If the vehicle can no longer be unlocked or
locked with the key or the KEYLESS GO
key*, use the emergency key element.
If you use the emergency key element to
unlock and open the driver's door or the boot
lid, the anti-theft alarm system* will be trig-
gered (Y page 71).
There are several ways to turn off the alarm:
X Press the korj button on the key.
or
X Insert the key into the ignition lock.
or
X Press the KEYLESS GO but-
ton* (Y page 85).
or
X Lock or unlock the vehicle using KEYLESS
GO*.
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the
key in the ignition lock. Releasing and removing the emergenc
y
key element 1
Release catch
2 Emergency key element
X Push release catch 1in the direction of
the arrow and at the same time remove
emergency key element 2from the key. Unlocking the vehicle
If the vehicle can no longer be unlocked cen-
trally with the key or the KEYLESS GO key*:
X Remove the emergency key element from
the key (Y page 300). $
To unlock
X Insert the emergency key element fully into
the lock of the driver's door.
X Turn the emergency key element anti-
clockwise to position $.
The door is unlocked.
i On right-hand-drive vehicles, turn the
emergency key element clockwise.
X Turn the emergency key element back and
remove it. Practical advice
* optional
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Replacing the wiper blades
31
2
new bulb in the bulb holder and turn in
a
clockwise direction.
X Side marker lamp/reversing lamp:
insert the new bulb in the bulb holder and
press in.
X Vehicles with LED turn signals: connect
the cables of the LED turn signal to the
connectors of the bulb holder.
X Reinsert the bulb holder and lock in posi-
tion .
X Close the side trim panel. Replacing the wiper blades
Windscreen wiper blades
G
Risk of accident
The windscreen will no longer be properly
wiped if the wiper blades are worn. Thi s
may prevent you from observing the traffic
conditions, thereby causing an accident.
Replace the wiper blades twice a year, ide-
ally in spring and autumn. G
Risk of accident
The wiper arms could start moving and
cause an injury if you leave the windscreen
wipers switched on.
Remove the key from the ignition lock
before replacing the wiper blades.
! Make sure you touch only the wiper arm
of the windscreen wiper to avoid damaging
the windscreen wiper blades.
Removin g X
Remove the key.
X Fold the wiper arm away from the wind-
screen until it engages . X
Set the wiper blade at right angles to the
wiper arm . X
Remove the wiper blade from the retainer
on the wiper arm in the direction of th e
arrow.
Fitting X
Slide the new wiper blade into the retaine r
on the wiper arm in the opposite direction
to the arrow.
X Turn the wiper blade parallel to the wiper
arm.
X Fold the wiper arm back onto the wind-
screen. Practical advic
e
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Flat tyre
313Rear window wiper blade (Estate)
Removin g G
Risk of injury
The wiper arm could be set in motion and
injure you if the windscreen wipers are
switched on.
Remove the key from the ignition lock
before replacing the wiper blade. 1
Wiper arm
2 Wiper blade
X Remove the key from the ignition lock.
X Fold the wiper arm away from the rear win-
dow until it engages . X
Position wiper blade 2at a right angle to
wiper arm 1.
X Hold wiper arm 1and press wiper
blade 2in the direction of the arrow until
it releases .
X Remove wiper blade 2.
Fitting X
Slide the new wiper blade 2onto wiper
arm 1.
X Hold wiper arm 1and press wiper blade
2 in the opposite direction to the arrow
until it engages.
X Make sure that wiper blade 2is seated
correctly.
X Position wiper blade 2parallel to wiper
arm 1and fold it back onto the rear win-
dow. Flat tyre
Your vehicle may be equipped with:
R a TIREFIT kit (Y page 235 )
R a "Minispare" emergency spare wheel*
R a spare wheel* (Y page 235 )
R the MOExtended run-flat sys-
tem* (Y page 323 ) Preparing the vehicle
i Vehicle preparation is not necessary on
vehicles with MOE tyres.
X Stop your vehicle as far away from traffic
as possible on solid, non-slippery, level
ground .
X Switch on the hazard warning lamps .
X Firmly depress the parking brake.
X All occupants must get out of the vehicle.
Make sure that they are not endangered as
they do so.
Vehicles with manual transmission X
Shift to either first or reverse gear. Practical advice
* optiona l
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Flat tyre
316
X
Remove the cap from valve 9on the faulty
tyre. a
Pressure release screw
b Pressure gauge
X Make sure pressure release screw aon
pressure gauge bis fully closed.
X Screw filler hose 8onto valve 9.
X Insert connector 5into the cigarett e
lighter socket (Y page 197) or into a 12V
socket* in your vehicle (Y page 198).
X Turn the ignition key to position 1in the
ignition lock . X
Press on/off switch 4on the electric air
pump to I.
The electric air pump is switched on. The
tyre is inflated.
i First, TIREFIT is pumped into the tyre. The
pressure can briefly rise to around 5 bar.
Do not switch off the compressor during
this phase.
X Let the compressor run for five minutes.
The tyre should then have a pressure of at
least 1.8 bar.
! Do not operate the electric air pump for
longer than six minutes without a break,
otherwise it may overheat.
The air pump can be operated again once
it has cooled down.
If a pressure of 1.8 bar is not reached after
five minutes:
X Switch off and disconnect the electric ai r
pump and drive the vehicle forwards or
backwards approximately 10 m.
This distributes the TIREFIT more evenly.
X Remove the TIREFIT filler bottle from th e
electric pump.
X Pump up the tyre again. G
Risk of accident
If a pressure of 1.8 bar is not achieved afte r
five minutes, the tyre is too badly damaged.
Do not drive any further. Consult a qualified
specialist workshop which has the neces-
sary specialist knowledge and tools to carry
out the work required. Mercedes-Benz rec-
ommends that you use a Mercedes-Benz
Service Centre for this purpose. In particu-
lar, work relevant to safety or on safety-
related systems must be carried out at a
qualified specialist workshop.
If a tyre pressure of 1.8 bar is reached:
X Press on/off switch 4on the electric air
pump to 0.
The electric air pump is switched off.
X Disconnect the electric air pump and stow
it away .
X Fold up the warning triangle and stow it
away .
X Pull away immediately.
This distributes the TIREFIT more evenly
around the tyre.
X Stop after driving for approximately ten
minutes and check the tyre pressure with
the electric air pump. Practical advice
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Flat tyre
3187
Valve
8 Filler hos e
X Remove the cap from valve 7on the faulty
tyre.
X Screw filler hose 8onto valve 7.
X Insert connector 4into the cigarett e
lighter socket (Y page 197) or into a 12V
socket* in your vehicle (Y page 198).
X Turn the ignition key to position 1in the
ignition lock .
X Press on/off switch 3on the electric air
pump to I.
The electric air pump is switched on. The
tyre is inflated. i
First, TIREFIT is pumped into the tyre. The
pressure can briefly rise to around 5 bar.
Do not switch off the compressor during
this phase.
X Let the compressor run for five minutes.
The tyre should then have a pressure of at
least 1.8 bar.
! Do not operate the electric air pump for
longer than six minutes without a break,
otherwise it may overheat.
The air pump can be operated again once
it has cooled down.
If a pressure of 1.8 bar is not reached after
five minutes:
X Switch off and disconnect the electric ai r
pump and drive the vehicle forwards or
backwards approximately 10 m.
This distributes the TIREFIT more evenly.
X Remove the sealant filler bottle from th e
electric pump.
X Pump up the tyre again. G
Risk of accident
If a pressure of 1.8 bar is not achieved afte r
five minutes, the tyre is too badly damaged. Do not drive any further. Consult a qualified
specialist workshop which has the neces-
sary specialist knowledge and tools to carry
out the work required. Mercedes-Benz rec-
ommends that you use a Mercedes-Benz
Service Centre for this purpose. In particu-
lar, work relevant to safety or on safety-
related systems must be carried out at
a
qualified specialist workshop.
If a tyre pressure of 1.8 bar is reached:
X Press 0on the electric air pump switch.
The electric air pump is switched off.
X Disconnect the electric air pump and stow
it away .
X Fold up the warning triangle and stow it
away .
X Pull away immediately.
This distributes the TIREFIT more evenly
around the tyre.
X Stop after driving for approximately ten
minutes and check the tyre pressure with
the electric air pump. G
Risk of accident
If the tyre pressure is now lower than
1.3 bar, the tyre is too badly damaged. Do
not drive any further. Consult a qualified Practical advice
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Battery
32
6 Battery in the engine compartment
1
Batter y
2 Positive terminal
3 Negative terminal
4 Breather hos e Battery in the boo
t
1 Positive terminal
2 Battery
3 Negative terminal
4 Breather hos e Disconnecting the batter
y G
Risk of accident
If the battery is disconnected:
R there is no brake boosting effect and yo u
will need to apply more pressure to brak e
and the brake pedal travel will be longer ; you may have to depress the brake peda
l
with full force
R you can no longer turn the key in the igni-
tion and with KEYLESS GO*, pressing th e
KEYLESS GO button* on the selector
lever will have no effect
R the selector lever is locked in position P
on vehicles with automatic transmis-
sion*
! Always disconnect the battery in the
sequence described below. Never swap the
terminal clamps. You may otherwise dam-
age the vehicle electronics.
Vehicles with the battery in the engine
compartment:
X Firmly depress the parking brake and shift
the selector lever to position Pon vehicles
with automatic transmission*.
X Switch off all electrical consumers .
X Turn the key to position 0in the ignition
lock and remove it.
X Open the bonnet.
X Remove the retaining clamps on the cover .
X Remove the negative terminal clamp from
the battery. Practical advice
* optional
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6

Battery
32
7
X
Remove the cover from the positive termi-
nal clamp.
X Remove the positive terminal clamp from
the battery.
X Disconnect the breather hose .
Vehicles with the battery in the boot/lug -
gage compartment :
X Firmly depress the parking brake and shift
the selector lever to position Pon vehicles
with automatic transmission*.
X Switch off all electrical consumers .
X Turn the key to position 0in the ignition
lock and remove it.
X Open the boot/luggage compartment.
X Remove the negative terminal clamp from
the battery.
X Remove the cover from the positive termi-
nal clamp.
X Remove the positive terminal clamp from
the battery.
X Disconnect the breather hose . Removing the battery
X Disconnect the battery (Y page 326).
X Loosen the screw which holds the battery
in place.
X Remove the battery. Charging and fitting the batter
y G
Risk of injury
Only charge the installed battery with a bat-
tery charger which has been tested and
approved by Mercedes-Benz. These battery
chargers allow the battery to be charge d
while it is still installed. Otherwise, the vehi -
cle's electronic system may be damaged.
Only charge the battery in a well-ventilate d
area. As the battery is being charged, gases
can escape and generate minor explosions.
This may injure you and other persons or
cause damage to the paintwork or acid cor-
rosion on the vehicle .
You can obtain information about battery
chargers which allow the battery to be
charged when still installed from a qualified
specialist workshop, e.g. a Mercedes-Ben z
Service Centre. G
Risk of injury
There is a risk of acid burns during the
charging process due to the gases which
escape from the battery. Do not lean ove r
the battery during the charging process.
! Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.
X Charge the battery. Observe the notes in
the operating instructions for your battery
charger.
X Refit the charged battery.
To do this, follow the steps described in
"Removing the battery" (Y page 327) in
reverse order. G
Risk of injury
Battery acid is caustic. Avoid contact with
the skin, eyes or clothing . Practical advice
* optional
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Towing and tow-startin
g330
R
Vehicles with an automatic transmission*
must not be tow-started.
R If the engine does not start, try jump-start-
ing it (Y page 328).
R If it is not possible to jump-start the vehicle ,
have it towed to the nearest qualified spe-
cialist workshop, e.g. a Mercedes-Ben z
Service Centre.
R If the vehicle has suffered transmission
damage, only tow it with the propeller shaft
disconnected.
R The selector lever must be in position Non
vehicles with automatic transmission*.
R If you are towing the vehicle over a consid-
erable distance, this may only be done with
the rear axle raised.
R The ignition must be switched off if you are
towing the vehicle with the front/rear axle
raised. Intervention by ESP ®
could other-
wise damage the brake system.
R Vehicles with 4MATIC* may not be towed
with the front or rear axle raised.
R Before towing the vehicle, make sure that
the battery is connected and charged. Oth-
erwise : -
You cannot switch on the ignition
- You cannot move the selector lever
to N(on vehicles with automatic trans-
mission*)
- You have no support when braking
i Switch off the automatic locking feature
before the vehicle is towed. You could oth-
erwise be locked out when pushing or tow -
ing the vehicle.
Deactivate tow-away protection befor e
towing (Y page 71). Fitting the towing eye
Vehicles with a trailer coupling: your vehi-
cle does not have a rear threaded socket for
mounting the towing eye. If you intend to use
the vehicle for towing, fold out the ball cou-
pling and secure the towline to it
( Y page 220).
Opening the front cover The fixtures for the removable towing eyes
are located in the bumpers. They are locatedat the front and rear under the covers on the
right-hand side of the vehicle.
Front bumper
1
Cove r
X Press the mark on cover 1inwards.
X Take cover 1off the opening but do not
remove it. Practical advice
* optional
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