2007 MERCEDES-BENZ G55AMG Owner's Manual

328 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
ú(USA only)
±(Canada only)
The yellow engine malfunc-
tion indicator lamp comes on
while driving.There is a malfunction in:

The fuel management system

The ignition system

The emission control system

Systems which impact emissions
Such malfunctions may result in
excessive emissions values and may
switch the engine to its limp-home
(emergency operation) mode.
Have the vehicle checked at an
authorized Mercedes-Benz Light
Truck Center as soon as possible .
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics
system. It allows the accurate
identification of system malfunctions
through the readout of diagnostic
trouble codes. It is located near the
hood lock release on the upper left of
the footwell.
iSome states may by law require you to visit
a workshop as soon as the engine malfunction
indicator lamp comes on. Check local require-
ments.

329 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
ú(USA only)
±(Canada only)
The yellow engine malfunc-
tion indicator lamp comes on
while driving.A loss of pressure has been
detected in the fuel system. The fuel
filler cap may not be closed properly
or the fuel system may be leaky.Check the fuel filler cap (page 264).
If it is not closed properly:
Close the fuel filler cap.
If it is closed properly:
Have the fuel system checked at an
authorized Mercedes-Benz Light
Truck Center.
Your fuel tank is empty.After refueling start, turn off and
restart the engine three or four times
in succession.
The limp-home (emergency opera-
tion) mode is canceled. You do not
need to have your vehicle checked.

330 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
vThe yellow ESP® warning lamp
comes on and remains on while
driving.You have engaged the differential locks. The
ABS, ESP®, BAS, EBB and 4-ETS are switched
off.
The driving systems will switch on
again after the differential locks have
been disengaged.
Read and observe messages in the
multifunction display (
page 338).
The ESP® has been switched off with the
ESP® switch or has switched off due to a
malfunction.
Risk of accident!
When the ESP
® is switched off, it will not
stabilize the vehicle if the system recognizes
that the vehicle starts to skid or that a wheel
is spinning.
The cruise control is deactivated and cannot
be switched on.
Switch the ESP® back on (page 95).
Exceptions: (
page 94).
If leaving the ESP® switched off, adapt
your speed and driving to the prevail-
ing road and weather conditions.
If the ESP
® cannot be switched on:
Read and observe messages in the
multifunction display (
page 338).
Continue driving with added caution.
Adapt your speed and driving to the
prevailing road and weather condi-
tions.
Have the system checked at an
authorized Mercedes-Benz Light
Truck Center as soon as possible.

331 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
vThe yellow ESP® warning lamp
comes on and remains on while
driving.The ESP® is deactivated because of inter-
rupted power supply. The ABS may still be
operational.Read and observe messages in the
multifunction display (
page 338).
The ESP®, ABS, BAS, EBB or 4-ETS has
detected a malfunction. All driving systems
are switched off.
Risk of accident!
Adapt your speed and driving to the
prevailing road conditions.Read and observe messages in the
multifunction display (
page 338).
The yellow fuel tank reserve warning lamp
comes on while driving.The fuel level has dropped below the reserve
mark.Refuel at the next gas station
(
page 264).
Read and observe messages in the
multifunction display (
page 338).
The yellow fuel tank reserve warning lamp is
blinking.The fuel cap is not closed tight.Check the fuel filler cap (page 264).
Read and observe messages in the
multifunction display (
page 338).

332 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
on for a maximum of 6 seconds
after starting the engine.The seat belt telltale reminds you and your
passengers to fasten your seat belts before
driving off.Fasten your seat belts.
Regardless of whether the seat belts
are fastened or not, the seat belt
telltale always comes on and remains
lit for 6 seconds after starting the
engine.
You hear a warning chime for a
maximum of 6 seconds after
starting the engine.You have forgotten to fasten your seat belt.Fasten your seat belt.
The warning chime stops sounding.
The red seat belt telltale comes
on while the vehicle is standing
still and the engine is running or
during driving.You and/or your front passenger have
forgotten to fasten your seat belts.Fasten your seat belts.
The seat belt telltale goes out.
There are items placed on the front passen-
ger seat and therefore the system senses the
front passenger seat as being occupied.Remove the items from the front
passenger seat and put them in a safe
place.
The seat belt telltale goes out.

333 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
telltale flashes and you
additionally hear an intermittent
warning chime with increasing
intensity.The vehicle’s speed once exceeded 15 mph
(25 km/h) and you and/or your front pas-
senger have forgotten to fasten your seat
belts.Fasten your seat belts.
The seat belt telltale goes out and the
warning chime stops sounding.
There are items placed on the front passen-
ger seat and therefore the system senses the
front passenger seat as being occupied.Remove the items from the front
passenger seat and put them in a safe
place.
The seat belt telltale goes out and the
warning chime stops sounding.
iAfter 60 seconds with an unfastened seat
belt the warning chime stops sounding and the
seat belt telltale illuminates continuously. The
seat belt telltale will only go out if both, the
driver’s and the front passenger’s seat belt are
fastened, or the vehicle is standing still and a
front door is opened.

334 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
1The red SRS indicator lamp
comes on while driving.There is a malfunction in the restraint
systems. The air bags or Emergency
Tensioning Devices (ETDs) might deploy
unexpectedly or may not deploy in an
accident.Drive with added caution to the nearest
authorized Mercedes-Benz Light Truck
Center and have the system checked.
Warning!G
In the event a malfunction of the SRS is indi-
cated as outlined above, the SRS may not be
operational. For your safety, we strongly
recommend that you contact an authorized
Mercedes-Benz Light Truck Center
immediately to have the system checked;
otherwise the SRS may not deploy when
needed in an accident, which could result in
serious or fatal injury, or it might deploy
unexpectedly and unnecessarily which
could also result in an accident and/or
injury to you or to others.

335 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
HCombination low tire
pressure/TPMS malfunction
telltale for the Advanced TPMS
illuminates continuously.The Advanced TPMS detects a loss of
pressure in at least one tire.Carefully bring the vehicle to a halt,
avoiding abrupt steering and braking
maneuvers. Observe the traffic situa-
tion around you.
Read and observe messages in the
multifunction display (
page 338).
If the tire inflation pressure in the respec-
tive tire(s) has (have) been corrected, the
combination low tire pressure/TPMS
malfunction telltale goes out after few
minutes driving.
Combination low tire
pressure/TPMS malfunction
telltale for the Advanced TPMS
flashes for 60 seconds and then
stays illuminated.There is a malfunction in the Advanced
TPMS.Read and observe messages in the
multifunction display (
page 338).
Have the Advanced TPMS checked at
an authorized Mercedes-Benz Light
Truck Center.
After the malfunction has been remedied
the combination low tire pressure/TPMS
malfunction telltale goes out after few
minutes driving.