2007 MERCEDES-BENZ G55AMG warning light

347 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
;(USA only)
! (Canada only)
Release
parking
brakeYou are driving with the parking brake
set.Release the parking brake
(
page 55).
2Brake
wearThe brake pads have reached their wear
limit.Have the brake pads replaced as
soon as possible.
BTop up
coolant
See
Operator’s
ManualThe coolant level is too low.Add coolant (page 274).
If you have to add coolant frequently,
have the cooling system checked at
an authorized Mercedes-Benz Light
Truck Center.
!Brake pad thickness must be visually
checked by a qualified technician at the intervals
specified in the Maintenance Booklet.
Warning!G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may burn if it comes into contact with hot
engine parts. You could be seriously burned.
!Do not ignore the low engine coolant level
warning. Extended driving with this message and
symbol displayed may cause serious engine
damage not covered by the Mercedes-Benz
Limited Warranty.
Do not drive without sufficient amount of coolant
in the cooling system. The engine will overheat,
causing major engine damage.

349 Practical hints
What to do if …
During severe operating conditions and
stop-and-go city traffic, the coolant tem-
perature may rise close to 248°F (120°C).
Display symbolDisplay messagePossible cause/consequencePossible solution
Observe the coolant temperature gauge in the
instrument cluster (
page 26).
If the temperature rises again:
Contact an authorized Mercedes-Benz
Light Truck Center immediately.
Warning!G
Driving when your engine is overheated can
cause some fluids which may have leaked
into the engine compartment to catch fire.
You could be seriously burned.
Steam from an overheated engine can cause
serious burns and can occur just by opening
the hood. Stay away from the engine if you
see or hear steam coming from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.
!The engine should not be operated with the
coolant temperature above 248°F (120°C).
Doing so may cause serious engine damage
which is not covered by the Mercedes-Benz
Limited Warranty.

351 Practical hints
What to do if …
When the message At next gas station
add 1.0 qt engine oil

(Canada:
1.0 liter) appears while the
engine is running and at operating
temperature, the engine oil level has
dropped to approximately the minimum
level.
When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.Visually check for oil leaks. If no oil leaks
are noted, continue to drive to the nearest
service station where the engine oil should
be topped to the required level with an
approved engine oil. For information on
approved engine oils, refer to the Factory
Approved Service Products pamphlet
(USA only) or contact an authorized
Mercedes-Benz Light Truck Center.
Display symbolDisplay messagePossible cause/consequencePossible solution
:USA only:
At next
gas station
add
1.0 qt
engine oil
Canada only:
At next
gas station
add
1.0 liter
engine oil
The engine oil level is too low.Add engine oil (page 273) and check
the engine oil level (
page 270).

352 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
:Engine oil
level
Stop, turn
engine offThere is no oil in the engine. There is
a danger of engine damage.Stop the vehicle in a safe location or as soon as
it is safe to do so.
Turn off the engine.
Add engine oil (page 273) and check the
engine oil level (
page 270).
Engine oil
level
Visit
workshopThe engine oil has dropped to a
critical level.Check the engine oil level (page 270) and add
engine oil as required (
page 273).
If you must add engine oil frequently, have the
engine checked for possible leaks.
You have added too much engine oil.
There is a risk of damaging the engine
and/or the catalytic converter.Have excess oil siphoned or drained off.
Observe all legal requirements with respect to
its disposal.
It may be that there is water in the
engine oil.Have the engine oil checked at an authorized
Mercedes-Benz Light Truck Center.
The measuring system is malfunction-
ing.Have the measuring system checked at an
authorized Mercedes-Benz Light Truck Center.
!The engine oil level warnings should not be
ignored. Extended driving with the symbol
displayed could result in serious engine damage
that is not covered by the Mercedes-Benz
Limited Warranty.

360 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
1Restraint
system
Service
Visit
workshopThere is a malfunction in the restraint sys-
tems. 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.
Restraint
system
malfunction
Visit
workshopThere is a malfunction in the restraint sys-
tems. 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.

363 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
§Transfer
case
Visit
workshopThe transfer case is malfunctioning.Do not switch the transfer case on.
Contact an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
TC
shift
procedure
canceledThe shift process in the transfer case was
canceled because of a malfunction.Repeat the shift process (page 170).
TC
shift
conditions
not fulfilledYou have not met the shift conditions for
a selection process in the transfer case.Repeat the shift process (page 170).
TC
in neutralNo gear has been selected in the transfer
case, it is in NEUTRAL.Engage transfer case to gear position
HIGH or LOW (
page 170).
Warning!G
If the transfer case is in NEUTRAL,
thePposition of the transmission will not
hold the vehicle. The parking brake must be
applied to hold vehicle in place.

375 Practical hints
Brush guard
Brush guard
The brush guard is available on G 55 AMG
(U.S vehicles only).
Lowering and raising brush guard
1Locking and unlocking handle
2Quick lock
3Lock
4End stop jointLowering
While holding brush guard firmly, open
quick lock2 using locking and unlock-
ing handle1.
Gently lower brush guard until it
reaches its fully lowered position.
Raising and securing
Flip up brush guard until it contacts end
stop joint4.
Quick lock stop pin2 must engage
the cross slot recess in lock3.
Now turn quick lock2 so that quick
lock makes contact with end stop
joint4.
Lock quick lock2 on both sides of
brush guard using locking and unlock-
ing handle1.
Warning!G
The brush guard is designed solely to
enhance the appearance of the vehicle and
help protect grille and headlights from minor
mishaps, either on- or off-road. Since the
safety characteristics are limited in the
event of an accident, brush guards are not
intended to prevent injury or damage in the
event of an accident. Also check state and
local regulations on installation and use.
Raise and lower brush guard in an open
space with plenty of room.
To help prevent personal injury when open-
ing or closing the brush guard, use extreme
caution not to trap hands or feet.
The brush guard must be in raised and
locked position while driving.
iOnly lower brush guard to clean headlamps
or to replace bulbs.
!Make sure both quick stop pins2 are
seated fully in lock3.

376 Practical hints
Replacing SmartKey batteries
If the batteries in the SmartKey are
discharged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized Mercedes-Benz Light Truck Center.
Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove the mechanical key from the
SmartKey (
page 370).
1Mechanical key
2Slide
3Battery compartment
Insert mechanical key1 in direction
of the arrow in side opening.
Using mechanical key1, push gray
slide2 to unlatch battery
compartment3.
Pull battery compartment3 out of the
housing in direction of the arrow.4Battery
5Contact spring
Remove discharged batteries4 in
direction of the arrow.
Using a lint-free cloth, insert new
batteries under contact spring5 with
the positive terminal (+) facing up.
Return battery compartment3 into
the housing until it locks into place.
Slide mechanical key1 back into the
SmartKey.
Check the operation of the SmartKey.
Warning!G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
iWhen inserting the batteries, make sure
they are clean and free of lint.
iWhen replacing batteries, always replace
both batteries.
The required replacement batteries are available
at any Mercedes-Benz Light Truck Center.