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Display messages
228 Symbol messages
G
Risk of accident and injury
Always have maintenance work carried out at a qualified specialist workshop which has the necessary specialist knowledge and tools to
carry out the work required.
Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose.
In
particular, work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop. If this work is not
carried out correctly, the operating safety of your vehicle could be compromised. There is a risk of accident and injury. Display messages Possible cause/consequence Possible solution
# The battery is not being charged. Possible
causes:
R
faulty alternator
R torn poly-V-belt
R 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
as soon as possible at a qualified specialist
workshop. Ê The boot lid is open. X
Close the boot lid. Y G
Risk of accident
Vehicles with an anti-theft alarm sys-
tem*: you are driving with the bonnet
open. X
Stop the vehicle. Pay attention to the traffic
conditions as you do so.
X Close the bonnet. Practical advice
* optional
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Display messages
239Display messages Possible cause/consequence Possible solution
I Key not detected
The KEYLESS GO key* cannot be detected
at present. X
Change the location of the KEYLESS GO key*
within the vehicle.
X Operate the vehicle using the key in the ignition
lock if necessary. I Key still in vehi-
cle
The KEYLESS GO key* was detected
inside the vehicle during locking. X
Remove the KEYLESS GO key* from the vehi-
cle. I Please replace key The key no longer functions. X
Visit a qualified specialist workshop. X inoperative Bat-
tery weak The battery voltage is insufficient. The
auxiliary heating/ventilation*
has
switched off or cannot be switched on. X
Drive for a longer distance.
The battery is being charged. The auxiliary
heating/ventilation* is reactivated as soon as
there is sufficient battery voltage. X inoperative Refuel There is insufficient fuel in the fuel tank.
The
auxiliary heating* cannot be switched
on. X
Refuel at the nearest filling station. X inoperative See
Owner's Manual
The auxiliary heating* has a temporary
malfunction or is faulty. X
When the vehicle is on a level surface and the
engine has cooled down: try to switch on the
auxiliary heating*
four times, waiting for sev-
eral minutes between each attempt.
X If the auxiliary heating* does not switch on:
visit a qualified specialist workshop. Practical advice
* optional
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Troubleshooting
255Engine
Problem Possible cause/consequence Suggested solutions
The engine will not start. HOLD is activated. X
Deactivating HOLD (Y page 145).
X Start the engine again. The engine will not start. You can
hear
the starter motor operating. R
There may be a malfunction in
the engine electronics.
R There may be a malfunction in
the fuel supply. X
Turn the key back to position 0 in the ignition lock before the next
starting attempt.
X Try to start the engine again (Y
page 101). When doing so, remem-
ber that excessively long and frequent attempts to start the engine
will drain the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. Vehicles with a diesel engine:
The
engine will not start. You can
hear the starter motor operating.
The reserve fuel warning lamp is
on and the fuel gauge shows 0. The fuel tank has been run dry. X
Refuel the vehicle.
X Bleed the fuel system (Y page 254). The engine will not start. You can-
not hear the starter motor oper-
ating. The on-board voltage is too low
because
the starter battery is too
weak or discharged. X
Jump-start the vehicle (Y page 291).
If the engine does not start despite attempting to jump-start it:
X Consult a qualified specialist workshop. Practical advice
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Troubleshooting
261Key
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock the
vehicle using the key. The key batteries are discharged
or nearly discharged. X
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 266).
X Check the key batteries (Y page 270) and replace them if neces-
sary ( Y page 270). The key is faulty. X
Lock or unlock the vehicle using the emergency key element
(Y page 266).
X Have the key checked at a qualified specialist workshop. The battery charge indicator lamp
of the key does not go on during
the test. The key batteries are discharged. X
Change the batteries ( Y page 270).You have lost a key. X
Have the 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. You have lost the emergency key
element. X
Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. Practical advice
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Troubleshooting
262 Problem Possible cause/consequence Suggested solutions
The key cannot be turned in the
ignition lock. The key has been in position
0 for
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 290).
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 290).
or
X Jump-start the vehicle (Y page 291).
or
X Consult a qualified specialist workshop. Practical advice
* optional
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Troubleshooting
263KEYLESS GO*
Problem Possible cause/consequence Suggested solutions
You cannot lock or unlock the
vehicle using the KEYLESS GO
key. The KEYLESS GO key batteries
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 266).
X Check the KEYLESS GO key batteries (Y page 270) and replace
them if necessary (Y page 270). 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 266). 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 270). Practical advice
* optional
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Troubleshooting
264 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 brake
when starting the engine. X
Depress the brake 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. Auxiliary heating/ventilation*
Problem Possible cause/consequence Suggested solutions
The auxiliary heating is not work-
ing. The fuel level is down to the
reserve level. X
Refuel at the nearest filling station. The battery is not sufficiently
charged. X
Charge the battery. The auxiliary heating is faulty. X
Have the auxiliary heating checked at a qualified specialist work-
shop. Practical advice
* optional
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Troubleshooting
265Problem Possible cause/consequence Suggested solutions
The auxiliary heating cannot be
switched on or off using the
remote control. The remote control display shows
FAIL and the
¢ symbol.
The signal transmission between
the remote control and the vehi-
cle is faulty. X
Change your position in relation to the vehicle, moving closer if
necessary.
X Make another attempt to switch the auxiliary heating on or off using
the remote control. The remote control display shows
FAIL and the
¡ symbol.
There is not enough fuel in the
tank, or the auxiliary heating is
faulty. X
Refuel at the nearest filling station.
X Have the auxiliary heating checked at a qualified specialist work-
shop. Parking up the vehicle
Problem 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 290). Practical advice
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