2003 MERCEDES-BENZ G55AMG service

249 Practical hints
What to do if …
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Possible cause
Suggested solution
Category
#
BATTERY/ALTERNATOR
VISIT WORKSHOP!
The battery was charged with a bat-
tery charger or jump started.

Have the battery checked at a
service station.
2
The battery is no longer charging.
Possible causes:

alternator malfunctioning


broken poly-V-belt

Stop immediately and check
the poly-V-belt.
If it is broken:

Do not continue to drive. Oth-
erwise the engine will overheat
due to an inoperative water
pump which may result in seri-
ous engine damage not cov-
ered by the Mercedes-Benz
Limited Warranty. Notify an
authorized Mercedes-Benz
Light Truck Center.
If it is intact:

Turn off unnecessary electric
consumers.

Drive immediately to the near-
est authorized Mercedes-Benz
Light Truck Center.

250 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
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3
(Canada only)
;
(USA only)
BRAKE PAD WEAR
VISIT WORKSHOP!
The brake pads have reached their
wear limit.

Have the brake pads replaced
as soon as possible.
2
BRAKE FLUID
VISIT WORKSHOP!
There is insufficient brake fluid in the
reservoir.

Risk of accident! Stop the vehi-
cle and notify an authorized
Mercedes-Benz Light Truck
Center. Do not add brake fluid!
This will not solve the problem.
2
Warning!
G
Driving with the last message displayed can
result in an accident. Have your brake sys-
tem checked immediately.
Don’t add brake fluid before checking the
brake system. Overfilling the brake fluid res-
ervoir can result in spilling brake fluid on hot
engine parts and the brake fluid catching
fire. You can be seriously burned.
!If you find that the brake fluid in the
brake fluid reservoir has fallen to the
minimum mark or below, have the
brake system checked for brake pad
thickness and leaks. !Brake pad thickness must be visually
checked by a qualified technician at the
intervals specified in the Service book-
let.

255 Practical hints
What to do if …
When the ENGINE OIL LEVEL – CHECK
LEVEL! message appears while the engine
is running and at operating temperature,
the engine oil level has dropped to approx-
imately the minimum mark on the dipstick.
When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.If no oil leaks are noted, continue to drive
to the nearest service station where the
engine oil should be topped to the “full”
mark on the dipstick with an approved oil.:
ENGINE OIL
VISIT WORKSHOP!
The engine oil has dropped to a crit-
ical level.

Check the engine oil level
(page 218) and add oil as re-
quired.

If you must add engine oil fre-
quently, have the engine
checked for possible leaks.
2
There is water in the oil.

Have the oil checked.
ENGINE OIL LEVEL
VISIT WORKSHOP!
The measuring system is malfunc-
tioning.

Have the measuring system
checked by an authorized
Mercedes-Benz Light Truck
Center.
2
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Possible cause
Suggested solution
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!The engine oil level warnings should
not be ignored. Extended driving with
the symbol displayed could result in se-
rious engine damage that is not cov-
ered by the Mercedes-Benz Limited
Warranty.

264 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
Category
1
RESTRAINT SYSTEM
VISIT WORKSHOP!
The system is malfunctioning. The
airbags or emergency tensioning de-
vice (ETDs) could deploy unexpect-
edly or fail to activate in an accident.

Drive with added caution to
the nearest authorized Mer-
cedes-Benz Light Truck Cen-
ter.
1
RESTRAINT SYSTEM
SERVICE
The system is malfunctioning. The
airbags or emergency tensioning de-
vice (ETDs) could deploy unexpect-
edly or fail to activate in an accident.

Drive with added caution to
the nearest authorized Mer-
cedes-Benz Light Truck Cen-
ter.
2
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 visit an authorized Mercedes-Benz
Light Truck Center immediately to have the
system checked.
Otherwise the SRS may not be activated
when needed in an accident, which could re-
sult in serious or fatal injury, or it might de-
ploy unexpectedly and unnecessarily which
could also result in injury.

266 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
Category
§
TC SHIFT
CANCELLED
The shift process in the transfer
case was cancelled because of a
malfunction.

Repeat the shift process
(page 141).
2
§
TC SHIFT CONDITIONS
NOT FULFILLED
You have not met the shift condi-
tions for a selection process in the
transfer case.

Repeat the shift process
(page 141).
2
§
TRANSFER CASE
VISIT WORKSHOP!
The transfer case is malfunctioning.

Do not switch the transfer
case on.

Visit an authorized
Mercedes-Benz Light Truck
Center as soon as possible.
2
L
TELE AID
VISIT WORKSHOP!
One or more main functions of the
Tele Aid system are malfunctioning.

Have the Tele Aid system
checked by an authorized Mer-
cedes-Benz Light Truck Cen-
ter.
1
Ê
TRUNK OPEN!
This message will appear whenever
the tailgate is open.

Close the tailgate.
2
#
UNDERVOLTAGE
ENGINE ON!
The battery has insufficient voltage.

Start the engine.
1
UNDERVOLTAGE
SWITCH CONSUMER OFF!
The battery has insufficient voltage.

Have the battery checked at a
service station.
1

295 Practical hints
Battery
Battery
The battery is located in front of the rear
seat bench and below the cup holder
Batteries contain materials that can harm
the environment if disposed of improperly.
Large 12-volt storage batteries contain
lead.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
Charging the battery
Have the battery removed at a
Mercedes-Benz Light Truck Center.
If you charge the battery yourself, make
sure to comply with the operating instruc-
tions for your battery charger.
Warning!
G
Failure to follow these instructions can re-
sult in severe injury or death.
Observe all safety instructions and precau-
tions when handling automotive batteries
(page 223).
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with eyes,
skin or clothing. In case it does, immediately
flush affected area with water and seek
medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
Warning!
G
Do not place metal objects on the battery as
this could result in a short circuit.
Use leak-proof battery only to avoid the risk
of acid burns in the event of an accident.
Warning!
G
Never charge a battery while still installed in
the vehicle. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.!Have the battery checked regularly by
an authorized Mercedes-Benz Light
Truck Center.
Refer to Service Booklet for mainte-
nance intervals or contact your autho-
rized Mercedes-Benz Light Truck
Center for further information.

307 Technical data
Spare parts service
Warranty coverage
Identification labels
Layout of poly-V-belt drive
Engine
Rims and tires
Electrical system
Main dimensions, vehicle weights and ratings
Fuels, coolants, lubricants etc.
Consumer information

308 Technical dataSpare parts serviceThe “Technical data” section provides the
necessary technical data for your vehicle.
Spare parts serviceAll authorized Mercedes-Benz Light Truck
Centers maintain a stock of original spare
parts required for maintenance and repair
work. In addition, strategically located
parts distribution centers provide quick
and reliable parts service.
More than 300 000 different spare parts
for Mercedes-Benz models are available.
Mercedes-Benz original spare parts are
subjected to stringent quality inspections.
Each part has been specifically developed,
manufactured or selected for and adapted
to Mercedes-Benz vehicles.
Therefore, Mercedes-Benz original spare
parts should be installed.
!The use of non-genuine parts and ac-
cessories not authorized by
Mercedes-Benz could damage the vehi-
cle, which is not covered by the
Mercedes-Benz Limited Warranty, or
could compromise the vehicle’s dura-
bility or safety.