2007 MERCEDES-BENZ C-CLASS SALOON light

Troubleshooting
28
7 Problem Possible cause/consequence Suggested solutions
You hear a warning tone. You have opened the driver's
door and forgotten to switch off
the lights. X
Turn the light switch to Mor* . You hear a warning tone.
G
Risk of injury
The driver or front passenger ha s
not fastened their seat belt. X
Fasten your seat belt (Y page 98). Accident
Problem Possible cause/consequence Suggested solutions
Fuel is leaking from the vehicle.
G
Risk of fire
The fuel line or the fuel tank ha s
been damaged. X
Switch off the ignition immediately.
X Remove the ignition key.
X Do not restart the engine under any circumstances .
The leaking fuel creates a risk of fire or explosion.
X Consult a qualified specialist workshop. You are unable to determine th
e
extent of the damage. X
Consult a qualified specialist workshop. You cannot detect any damage. X
Start the engine as normal. Practical advice
204_AKB; 2; 3, en-G
B
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Troubleshooting
29
1 Problem Possible cause/consequence Suggested solutions
Vehicles with a petrol engine:
The engine is not running
smoothly and is misfiring. The engine electronics or
a
mechanical component of the
engine control unit have been
damaged. X
Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at a qualified specialist work-
shop .
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it. A coolant temperature of over
120 °C is displayed. The coolant
warning lamp may also be on and
a warning signal may sound
(
Y page 123). The coolant level is too low. The
coolant is too hot and the engin
e
is no longer being cooled suffi-
ciently. X
Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 209). Observe the warning notes
as you do so and top up the coolant if necessary. If the coolant level is correct, the
radiator fan may be faulty. The
coolant is too hot and the engin
e
is no longer being cooled suffi-
ciently. X
If the coolant temperature is less than 120°C, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. when driving on
mountain roads and stop/start driving . Practical advice
204_AKB; 2; 3, en-GB
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Troubleshooting
29
3 Parktronic*
Problem Possible cause/consequence Suggested solutions
Only the red segments in the
Parktronic warning display are lit.
You also hear a warning tone for
approximately two seconds.
Parktronic is deactivated after
approximately 20 seconds and
the indicator lamp in the Park-
tronic button lights up. Parktronic has malfunctioned
and has switched itself off. X
If problems persist, have Parktronic checked at a qualified spe-
cialist workshop. Only the red segments in the
Parktronic warning display are lit.
Parktronic is deactivated after
approximately 20 seconds. The Parktronic sensors are dirty
or there is interference. X
Clean the Parktronic sensors (Y page 230).
X Switch the ignition back on. Only the red segments in the
Parktronic warning display are lit.
Parktronic is deactivated afte
r
approximately 20 seconds. The problem may be caused by an
external source of radio or ultra-
sound waves
. X
See if Parktronic functions in a different location. Practical advice
* optiona l
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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
204_AKB; 2; 3, en-G
B
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Troubleshooting
29
8 KEYLESS GO*
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock th
e
vehicle using the KEYLESS GO
key. The KEYLESS GO key batterie
s
are discharged or nearly dis-
charged. X
Lock or unlock the vehicle using the remote control function of the
key. Point the tip of the key at the driver's door handle from close
range and try to open the vehicle again.
If this does not work:
X Lock or unlock the vehicle using the emergency key element
(Y page 300).
X Check the KEYLESS GO key batteries (Y page 304) and replace
them if necessary (Y page 304). There is a fault with KEYLESS GO. X
Lock or unlock the vehicle using the remote control function of the
key. To do this, point the tip of the key at the driver's door handle
from close range and try to open the vehicle again.
X Have the KEYLESS GO key checked at a qualified specialist work-
shop . There is interference from a pow-
erful source of radio waves. X
Lock or unlock the vehicle using the emergency key element
(Y page 300). The battery check lamp in the
KEYLESS GO key does not light
up when tested. The KEYLESS GO key batteries
are discharged. X
Change the batteries (Y page 304). Practical advice
* optional
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Changing the bulbs
307
Rear bulbs Bulb Type
7 Third brake lamp LED
8 Side marker
lamp
Rear foglamp W 5
W
P 21 W 9 Turn signal
(rear) PY 21
W
or
LED* 18 a Brake lamp/tail
lamp 2 x P 21
W b Reversing lamp P 21
W
or
W 16 W19
(Estate) c Licence plate
lighting W 5
W Before changing bulbs
R
Use only the bulb types specified here.
R To prevent a short-circuit, switch off the
lights before changing a bulb.
R Only hold bulbs with a clean, lint-free cloth.
R Do not work with wet or greasy fingers.
R If the new bulb still does not light up, con-
sult a qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
R Have the following bulbs changed at a
qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre:
- the additional turn signal lamps in the
exterior mirrors
- the turn signal lamp* (vehicles with ligh t
package*)
- the third brake lamp
- the front foglamps
- the bi-xenon bulb s
- the licence plate lighting
i Due to the location of the front head -
lamps, it is best to have the bulbs changed at a qualified specialist workshop, e.g.
a
Mercedes-Benz Service Centre.
i Have the headlamp setting checked reg-
ularly at a qualified specialist workshop ,
e.g. a Mercedes-Benz Service Centre. Changing the front bulbs
Halogen headlamps (left-hand side, right mirror
image)
1 Bulb holder for turn signal
2 Housing cover for parking lamp
3 Housing cover for parking lamp
4 Housing cover for main-beam headlamp
5 Housing cover for dipped-beam headlamp
18 Vehicles with light package*: always have the LEDs changed at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
19 Only vehicles without LED turn signal lamps are equipped with these bulb type s Practical advice
* optional
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Changing the bulbs
308Bi-xenon headlamp* (left-hand side, right mirror
image)
1
Bulb holder for turn signal
2 Housing cover for parking lamp
3 Housing cover for parking lamp
4 Housing cover for main-beam headlamp
5 Housing cover for dipped-beam headlamp
(bi-xenon headlamps) Halogen headlamps (left-hand side, right mirro
r
image)
6 Bulb holder for parking lamp
7 Bulb holder for parking lamp
8 Bulb holder for main-beam headlamp
9 Bulb holder for dipped-beam headlamp Bi-xenon headlamp* (left-hand side, right mirror
image)
6 Bulb holder for parking lamp
7 Bulb holder for parking lamp
8 Bulb holder for main-beam headlamp
Replacing dipped-beam headlamps
(vehicles with halogen headlamps) X
Switch off the lights .
X Open the bonnet.
X Turn housing cover 5anti-clockwise and
remove it.
X Disconnect the connector from the bulb .
X Gently push in retaining spring of lamp
holder 9and detach it downwards .Practical advice
* optional
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Changing the bulbs
309
X
Remove the bulb from the bulb holder,
holding the base (not the glass tube).
X Insert the new bulb so that the base fits flat
into the recess in the bulb holder.
X Clip in the retaining spring of bulb
holder 9.
X Attach the connector to the bulb .
X Put on the housing cover and turn it clock -
wise until it clips into place.
Replacing the bulbs in the main-beam
headlamp s 8
Bulb holder for main-beam headlamp
X Switch off the lights .
X Open the bonnet. X
Turn housing cover 4anti-clockwise and
remove it.
X Push down the lamp on the connector until
it is released.
X Remove the bulb from bulb holder 8, hold-
ing the base (not the glass tube).
X Disconnect the connector from the bulb .
X Attach the connector to the new bulb .
X Put the bulb in at the bottom and push it up
until it clips into place, so that the base fits
flush in the recess on the bulb holder.
X Put on the housing cover and turn it clock -
wise until it clips into place .
Changing the bulbs in the side lamps
and parking lamps X
Switch off the lights .
X Open the bonnet.
X Turn housing cover 2or3 anti-clockwis e
and remove it.
X Pull out bulb holder 6or7 with the bulb.
X Pull the bulb out of the bulb holder.
X Push the new bulb into the bulb holder. X
Insert the bulb holder into the headlamp
and push it in.
X Put on the housing cover and turn it clock -
wise until it clips into place.
Replacing the turn signal lamps X
Switch off the lights .
X Open the bonnet.
X Turn bulb holder 1anti-clockwise and
remove it along with the bulb.
X Turn the bulb anti-clockwise, applying
slight pressure, and remove it from the bulb
holder.
X Insert the new bulb into the bulb holder and
turn it clockwise. Practical advice
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