2007 MERCEDES-BENZ C-CLASS SALOON check engine

Display
messages 26
7 Display messages Possible cause/consequence Possible solution
. Switch off lights
or remove key The light switch is set to the
*position
or the daytime driving lights are switched
on and you have not removed the key. The
side lamps remain switched on. A warning
tone also sounds. X
Remove the key from the ignition lock.
or
X Turn the light switch to M. ò 4-button multi-function
steering wheel:
Replace air
cleane
r
12-button luxury multi-
function steering
wheel:
Replace air
cleane r The engine air filter must be replaced. X
Visit a qualified specialist workshop. N 4-button multi-function
steering wheel:
Check eng. oil
level
12-button luxury multi-
function steering
wheel:
Check eng. oil lev.
when next refuel
-
ling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 208 )and top
up the engine oil if necessary .
X Have the engine checked for leaks if the engine
oil needs topping up more often than usual . Practical advice
204_AKB; 2; 3, en-GB
mkalafa,
2007-06-26T23:11:51+02:00 - Seite 267 Z

Troubleshooting
28
2 Problem Possible cause/consequence Suggested solutions
D
The red coolant warning
lamp lights up while the
engine is running. You will
also hear a warning tone. The coolant temperature has
exceeded 130
†. The engine is
not being cooled sufficiently and
may be damaged .
The coolant level may be too low. X
Stop the vehicle as soon as possible. Pay attention to the traffic
conditions as you do so.
X Allow the engine and coolant to cool.
X Check the coolant level. Observe the warning note s
( Y page 209). Top up the coolant if necessary.
X Have the coolant system checked at a qualified specialist work-
shop if the coolant needs topping up more often than usual .
If the coolant level is correct, the radiator fan may be faulty. In this
case:
X Do not continue driving under any circumstances .
X Consult a qualified specialist workshop. ±
The yellow engine diagnos-
tic warning lamp lights up
while the engine is run-
ning. Vehicles with a diesel engine: the
fuel tank has run dry. X
Start the engine three to four times after refuelling.
Emergency running mode is cancelled. The vehicle need not be
checked. Practical advice
204_AKB; 2; 3, en-G
B
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Troubleshooting
28
3 Problem Possible cause/consequence Suggested solutions
±
The yellow engine diagnos-
tic warning lamp lights up
while the engine is run-
ning. There may be a malfunction:
R
in the fuel injection system or
R in the exhaust system or
R in the ignition system (on vehi-
cles with a petrol engine)
The emission limit values may be
exceeded and the engine may be
running in emergency mode. X
Have the vehicle checked as soon as possible at a qualified spe -
cialist workshop. =
The red SRS warning lamp
lights up while the engine
is running. G
Risk of injury
The restraint systems are faulty .
The airbags or belt tensioners
may either be triggered uninten-
tionally or, in the event of an acci-
dent, not be triggered at all. X
Visit a qualified specialist workshop immediately. <
The red seat belt warning
lamp lights up for 6 sec-
onds after the engine
starts up. 16 The seat belt warning lamp
reminds the driver and front
passenger to fasten their seat
belts. X
Fasten your seat belt (Y page 98). 16
Only for certain countries Practical advice
204_AKB; 2; 3, en-GB
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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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2007-06-26T23:11:51+02:00 - Seite 291

Troubleshooting
29
2 Automatic transmission
*Problem Possible cause/consequence Suggested solutions
The transmission has problems
shifting gear The transmission is losing oil. X
Have the transmission checked at a qualified specialist workshop
immediately . The acceleration ability is deteri-
orating.
The transmission no longer
changes gear. The transmission is in emergenc
y
mode.
It is only possible to shift into
2nd gear and reverse gear. X
Stop the vehicle.
X Move the selector lever to P.
X Turn the key to position 0in the ignition lock .
X Wait at least 10 seconds before restarting the engine.
X Move the selector lever to position Dor R.
If D is selected, the transmission shifts into 2nd gear; if Ris selec -
ted, the transmission shifts into reverse gear .
X Have the transmission checked at a qualified specialist workshop
immediately . Practical advice
* optional
204_AKB; 2; 3, en-GB
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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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Battery
32
5 Centre or a special collection point for old
batteries . G
Risk of injury
Mercedes-Benz recommends that, for
safety reasons, you only use batteries
which have been tested and approved for
your vehicle by Mercedes-Benz. These bat-
teries provide increased impact protectio n
to prevent vehicle occupants from suffering
acid burns should the battery be damage d
in the event of an accident .
To prevent acid burns, observe the follow-
ing safety notes when handling batteries:
R Do not lean over batteries .
R Do not place any metal objects on a bat-
tery. You could otherwise cause a short
circuit and the battery's highly flammabl e
gas mixture could ignite.
R Make sure that you do not create elec-
trostatic charge, e.g. by wearing syn-
thetic clothing or as a result of friction on
fabrics. You should not therefore pull or
slide the battery over carpets or other
synthetic materials.
R Never touch the battery first. To dis-
charge a possible electrostatic charge, step out of the vehicle first and touch the
bodywork.
R Do not wipe the battery using a cloth. Th e
battery may explode as a result of elec-
trostatic charge or through the creation
of sparks .
! Switch the engine off and remove the key
before unscrewing or disconnecting the
terminal clamps from the battery. You may
otherwise destroy electronic components
such as the alternator.
Have the starter battery checked and, if
necessary, replaced at a qualified specialist
workshop, e.g. a Mercedes-Benz Service
Centre, every two years or at least every
20,000 km.
i Mercedes-Benz recommends that you
have all work involving the battery, e.g.
removing, charging and replacing, carried
out at a qualified specialist workshop, e.g.
a Mercedes-Benz Service Centre.
Installation location of the battery Depending on its engine type, your vehicle is
equipped with a battery in the engine com-
partment or boot/luggage compartment. It islocated on the right-hand side (direction of
travel) in front of the bulkhead or on the right-
hand side in the spare wheel well.
1
Cove r
2 Clamps Practical advice
204_AKB; 2; 3, en-GB
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5

Towing and tow-startin
g 329
The positive and negative contacts are loca-
ted on the front bulkhead on the right-han d
side of the vehicle. 1
Positive terminal of donor batter y
2 Cove r
3 Positive contact on your vehicle
4 Negative contact on your vehicle
5 Negative terminal of donor battery
X Slide cap 2of positive contact 3in the
direction of the arrow.
X Attaching the jump-start cable to the donor
battery first, connect positive terminal 1
of the donor battery and positive contact
on your vehicle 3.
X Start the engine of the donor vehicle and
run it at idling speed . X
Attaching the jump-start cable to the donor
battery first, connect negative terminal 5
of the donor battery and negative contact
on your vehicle 4.
X Start the engine.
X Electrical consumers can be switched on
again. Do not switch the lights on however ,
as this will overload the battery.
X First disconnect the jump lead from nega -
tive terminals 4and 5, then from positiv e
terminals 1and 3.
X Have the battery checked at a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. Towing and tow-starting
Points to remember
G
Risk of accident
If you tow the vehicle, you must use a rigid
towing bar if:
R the engine is not running
R there is a brake system malfunctio n
R the voltage supply or the vehicle's elec-
trical system is damage d
There is no power assistance for the steer-
ing when the engine is not running.
It is better to have the vehicle transported
than to have it towed.
When towing, observe the legal requirement s
in all countries concerned.
! You may tow the vehicle for a maximum
of 50 km. A towing speed of 50 km/h must
not be exceeded.
With towing distances over 50 km, the
entire vehicle needs to be lifted up and
transported.
! Only secure the tow cable or towing bar
to the towing eyes. You may otherwise
damage the vehicle. Practical advice
204_AKB; 2; 3, en-GB
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2007-06-26T23:11:51+02:00 - Seite 329