display MERCEDES-BENZ G55AMG 2008 W463 Owners Manual

346 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
•Coolant
Stop, turn
engine offThe coolant is too hot.
Among other possible causes, the
poly-V-belt could be broken.Stop the vehicle in a safe location or as soon
as it is safe to do so.
Apply the parking brake (page 62).
Turn off the engine.
Check the poly-V-belt.
If it is broken:
Do not continue to drive.
Otherwise, the engine will overheat due to an
inoperative water pump which may result in
damage to the engine.
Contact an authorized Mercedes-Benz Light
Truck Center.
If it is in order:
Wait for the message to disappear before
restarting the engine.
Doing otherwise could result in serious engine
damage that is not covered by the
Mercedes-Benz Limited Warranty.
(Continued on next page)
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347
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 se riously burned.
Steam from an overheated engine can cause
serious burns and can oc cur 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.
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348 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
•The cooling fan for the coolant is
malfunctioning.Observe the coolant temperature
gauge in the multifunction display
(
page 26).
If the coolant temperature is
below 120°C, you may continue
driving to the nearest specialist
workshop.
Avoid placing heavy loads on the
engine (e.g. by driving uphill) as well as
stop-and-go traffic.
Have the fan replaced as soon as
possible.
ÑCr. control
and SPEED-
TRONIC
inoperativeThe cruise control is malfunctioning.Have the cruise control checked at an
authorized Mercedes -Benz Light Truck
Center.
JYou are attempting to drive with one or
more doors open.Close the doors.
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349
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).
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350 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.
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351
Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
AReserve fuel
levelThe fuel level has dropped below the
reserve mark.Refuel at the next gas station
(
page 264).
4Gas cap
is openA 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.
YYou are driving with the hood open.Risk of accident!
Stop the vehicle in a safe location or as
soon as it is safe to do so.
Close the hood (page 269).
IRemove
keyYou have forgotten to remove the
SmartKey from the starter switch.Remove the SmartKey from the starter
switch.
Get a new
keyThe SmartKey is no longer functional.Contact an authoriz ed Mercedes-Benz
Light Truck Center.
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352 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.3rd brake
lampThe high mounted brake lamp is malfunc-
tioning. This message will only appear if a
critical number of LEDs have stopped
working.Contact an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
AUTO-Light
inoperativeThe light sensor is malfunctioning.
The headlamps switch on automatically.Contact an authoriz ed Mercedes-Benz
Light Truck Center as soon as
possible.
To switch off the headlamps
(U.S. vehicles only):
In the control system, set lamp
operation to manual mode
(
page 151).
Switch off the headlamps using the
exterior lamp switch (
page 117).
Brake lamp
leftThe left brake lamp is malfunctioning.Replace the bulb as soon as possible
(
page 383).
Brake lamp
rightThe right brake lamp is malfunctioning.Replace the bulb as soon as possible
(
page 383).
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353
Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.Front
foglamp
leftThe left front fog lamp is malfunctioning.Replace the bulb as soon as possible
(
page 380).
Front
foglamp
rightThe right front fog lamp is malfunctioning.Replace the bulb as soon as possible
(
page 380).
Front left
side marker
lampThe left front side marker lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 382).
Front right
side marker
lampThe right front side marker lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 382).
High beam
leftThe left high beam lamp is malfunc-
tioning.Contact an authorized
Mercedes-Benz Light
Truck Center as soon as possible.
High beam
rightThe right high beam lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz Light
Truck Center as soon as possible.
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354 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.License plate
lamp, leftThe left license plate lamp is malfunc-
tioning.Replace the bulb as soon as possible
(
page 385).
License plate
lamp, rightThe right license plate lamp is malfunc-
tioning.Replace the bulb as soon as possible
(
page 385).
Low beam
leftThe left low beam lamp is malfunc-
tioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
Low beam
rightThe right low beam lamp is malfunc-
tioning.Contact an authoriz ed Mercedes-Benz
Light Truck Center as soon as
possible.
Parking lamp
front left
Auxiliary bulb
onThe left front parking lamp is malfunc-
tioning. A substitute bulb has been
brought into use.Replace the bulb as soon as possible
(
page 378).
Parking lamp
front right
Auxiliary bulb
onThe right front parking lamp is malfunc-
tioning. A substitute bulb has been
brought into use.Replace the bulb as soon as possible
(
page 378).
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355
Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.Rear
fog lampThe rear fog lamp is malfunctioning. Replace the bulb as soon as possible
(
page 384).
Rear
fog lamp
Auxiliary bulb
onA lamp is malfunctioning. A substitute
bulb has been brought into use.Switch off the rear fog lamp (page 121).
Reverse
lamp
right

The right backup lamp is malfunction-
ing.Replace the bulb as soon as possible
(
page 384).
Switch off
lightsYou have removed the SmartKey from
the starter switch, opened the driver’s
door and left the headlamps on.Switch off the headlamps using the exterior lamp
switch (
page 117).
Tail lamp
left
Auxiliary bulb
onThe left tail lamp is malfunctioning.
A substitute bulb has been brought into
use.Replace the bulb as soon as possible
(
page 383).
Tail lamp
right
Auxiliary bulb
onThe right tail lamp is malfunctioning.
A substitute bulb has been brought into
use.Replace the bulb as soon as possible
(
page 383).
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