2008 MERCEDES-BENZ G-CLASS SUV check engine

Display
messages 201Display messages Possible cause/consequence Possible solution
# The battery is not being charged. Possible
ca
uses are:
R a faulty alternator
R a torn poly-V-belt
R a malfunction in the electronics X
Stop immediately and safely when traffic con-
ditions allow and check the poly-V-belt.
X If it has torn: do not drive on. Contact the
nearest qualified specialist workshop.
X If it is not damaged: have the vehicle checked
immediately at a qualified specialist workshop. # The battery voltage is too low. X
Start the engine.
X Switch off consumers that are not required. 2 Brake wear The brake pads/linings have reached
their wear limit. X
Have the brake pads/linings replaced as soon
as possible at a qualified specialist workshop. 3 Check brake fluid
level G
Risk of accident
There is insufficient brake fluid in the
brake fluid reservoir. X
Pull over as soon as it is safe to do so.
X Do not continue driving under any circumstan-
ces.
X Consult the nearest qualified specialist work-
shop.
X Do not top up the brake fluid. This will not rec-
tify the malfunction. 3 Electronic brake
force distribution
Consult workshop G
Risk of accident
Electronic brake force distribution has
been switched off due to a malfunction.
BAS is also inoperative.
The brake system is still available with
complete brake boosting effect. X
Drive on carefully.
X Visit a qualified specialist workshop immedi-
ately. Practical advice
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Display
messages 203Display messages Possible cause/consequence Possible solution
Ï Coolant Stop car
Turn eng. off The coolant is too hot. X
Stop the vehicle. Pa y attention to traffic con-
ditions as you do so.
X Switch off the engine.
X Wait until the message disappears before
restarting the engine. Otherwise, there is a risk
of engine damage.
X Observe the coolant temperature gauge.
X If the temperature increases again, visit a quali-
fied specialist workshop immediately. Ï Coolant Stop car
Turn eng. off The poly-V-belt may have torn. X
Stop the vehicle. Pay attention to traffic con-
ditions as you do so.
X Switch off the engine.
X Check the poly-V-belt.
X If it has torn: do not drive on. Contact the
nearest qualified specialist workshop.
X If it is not damaged: do not start the engine
again until the message disappears. Other-
wise, there is a risk of engine damage. B Top up coolant See
Owner's Manual The coolant level is too low. X
Top up the coolant, observing the warning
notes before doing so (Y page 161).
X Have the coolant system checked at a qualified
specialist workshop if the coolant needs top-
ping up more often than usual. Practical advice
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Display
messages 207Display messages Possible cause/consequence Possible solution
. Reversing lamp The reversing lamp is fa
ulty. X
Replace the bulb (Y page 235). . Tail lamp left
Back-up bulb on
or
Tail lamp right
Back-up bulb on The left-hand or right-hand tail lamp is
faulty. Another lamp has taken over its
function. X
Replace the bulb (Y page 235). ò Replace air
cleaner The engine air filter must be replaced. X
Visit a qualified specialist workshop. N Check eng. oil
level when next
refuelling The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 159) 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. N Engine oil level
Stop car Turn eng.
off There is insufficient oil in the engine.
There is a danger of engine damage. X
Stop the vehicle. Pay attention to traffic con-
ditions as you do so.
X Switch off the engine.
X Top up the engine oil and check the level
(Y page 159). N Engine oil level
Consult workshop You have added too much engine oil.
There is a risk of damaging the engine or
catalytic converter. X
Siphon off excess engine oil until it is at the
specified level. Observe the legal require-
ments. N Engine oil level
Consult workshop There is water in the engine oil. X
Have the engine oil checked. Practical advice
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Display
messages 208 Display messages Possible cause/consequence Possible solution
N Engine oil level
Consult workshop The engine oil level has dropped to a crit-
ical level. X
Check the engine oil level (Y page 159) 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. N Cannot measure
engine oil level The measuring system is faulty. X
Visit a qualified specialist workshop. I Replace key The key no longer functions. X
Visit a qualified specialist workshop. ( Lock driver's seat
or
Lock front-pass.
seat The seat backrest is not engaged. X
Push the backrest back until it engages. Ñ Cr. control and
SPEED-TRONIC inop-
erative Speedtronic and cruise control are
unavailable. X
Visit a qualified specialist workshop. 4 Reserve fuel level The fuel level has fallen below the reserve
range. The operation of the auxiliary heat-
ing* can no longer be guaranteed. X
Refuel at the nearest filling station. t Telephone Enter
PIN
or
TEL PIN? You have not yet logged on to your mobile
phone*. X
Enter the PIN for the SIM card. Practical advice
* optional
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Troubleshooting
215Problem Possible cause/consequence Suggested solutions
3
The red brake system
warning lamp comes on
while the engine is run-
ning. G
Risk of accident
There is insufficient brake fluid in
the fluid reservoir. X
Do not continue driving under an y circumstances.
X Consult a qualified specialist workshop immediately.
X Observe the additional messages in the multi-function display
(Y page 194).
X Under no circumstances should you top up the brake fluid. This will
not rectify the fault. ±
The yellow engine diagnos-
tics warning lamp comes
on 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. There may be a malfunction:
R
in the fuel injection system
R in the exhaust system
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 engine electronics are mal-
functioning. The engine power
output is reduced. X
Visit a qualified specialist workshop immediately.
X Do not drive at full throttle and do not exceed an engine speed of
2,500 rpm. The diesel particle filter* is full
and can no longer be regenerated
(self-cleaning). X
Have the diesel particle filter* checked at a qualified specialist
workshop as soon as possible. Practical advice
* optional
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Troubleshooting
221Problem Possible cause/consequence Suggested solutions
A coolant temperature of over
120 † is displa
yed. The coolant
warning lamp may also be on and
a warning tone may sound
(Y page 96). The coolant level is too low. The
coolant is too hot and the engine
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 161). 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 engine
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. driving on
mountain roads and stop/start driving. Practical advice
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Troubleshooting
222 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
immediatel y. The acceleration ability is deteri-
orating.
The transmission no longer
changes gear. The transmission is in emergency
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 2ndgear; if Ris selec-
ted, the transmission shifts into reverse gear.
X Have the transmission checked at a qualified specialist workshop
immediately. Ultrasonic reversing aid*
Problem Possible cause/consequence Suggested solutions
When you engage the selector
lever into position
R, you will not
hear a warning tone and none of
the segments of the ultrasonic
reversing aid will light up. You have a trailer connected.
You have an adapter plug inser-
ted into the trailer power socket. X
Unplug the adapter plug.
The ultrasonic reversing aid functions again as usual. Practical advice
* optional
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Troubleshooting
226 Problem Possible cause/consequence Suggested solutions
You have lost the emergency key
element. X
Report the loss immediatel y to the vehicle insurers.
X If necessary, have the manual locks changed too. The key cannot be turned in the
ignition lock. The key has been in position
0for
a considerable time. X
Remove the key and reinsert it into the ignition lock.
X Check the starter battery and recharge it if necessary
(Y page 250).
X Start the engine. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to turn the key again.
If this does not work:
X Check the starter battery and recharge it if necessary
(Y page 250).
or
X Jump-start the vehicle (Y page 251).
or
X Consult a qualified specialist workshop. Practical advice
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