MERCEDES-BENZ G500 2003 W463 Owner's Manual

251 Practical hints
What to do if …
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Possible cause
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Category
B
COOLANT
CHECK LEVEL!
The coolant level is too low.

Add coolant (
page 220).

If you have to add coolant fre-
quently, have the cooling sys-
tem checked by an authorized
Mercedes-Benz Light Truck
Center.
2
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 can be seriously burned.
!Do not ignore the low engine coolant
level warning. Extended driving with
the 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 serious
engine damage.
Observe the coolant temperature dis-
play (
page 108).

252 Practical hintsWhat 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
Possible cause
Suggested solution
Category
B
COOLANT
STOP, ENGINE OFF!
The coolant is too hot.

Stop the vehicle and turn off
the engine.

Only start the engine again af-
ter the message disappears.
You could otherwise damage
the engine.
1
Warning!
G
Driving when your engine is badly overheat-
ed 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 engine 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 it
cools 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.

253 Practical hints
What to do if …
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Possible cause
Suggested solution
Category
B
COOLANT
STOP, ENGINE OFF!
The poly-V-belt could be broken.

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
damage to the engine. Notify
an authorized Mercedes-Benz
Light Truck Center.
If it is in order:

Do not continue to drive the
vehicle with this message dis-
played. Doing so could result
in serious engine damage that
is not covered by the
Mercedes-Benz Limited War-
ranty.
1
COOLANT
VISIT WORKSHOP!
The cooling fan for the coolant is
malfunctioning.

Observe the coolant tempera-
ture display (
page 108).

Have the fan replaced as soon
as possible.
2

254 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
Category
Ñ
CRUISE CONTROL
VISIT WORKSHOP!
Cruise control is malfunctioning.

Visit an authorized
Mercedes-Benz Light Truck
Center.
2
J
DOOR OPEN!
You are attempting to drive with one
or more doors open.

Close the doors.
1
e
ENGINE AIR FILTER
VISIT WORKSHOP!
The engine filter is clogged and must
be replaced.

Visit an authorized
Mercedes-Benz Light Truck
Center as soon as possible.
2
:
ENGINE OIL LEVEL
STOP, ENGINE OFF!
There is no oil in the engine. There is
a danger of engine damage.
See also comments on the following
page.

Carefully bring the vehicle to a
halt as soon as possible.

Turn off the engine.

Add engine oil and check the
engine oil level (
page 218).
1
ENGINE OIL LEVEL
CHECK LEVEL!
The engine oil level is too low.
See also comments on the following
page.

Check the engine oil level
(page 218) and add oil as re-
quired.
2
ENGINE OIL LEVEL
REDUCE OIL LEVEL!
You have added too much engine oil.
There is a risk of damaging the en-
gine or the catalytic converter.
See also comments on the following
page.

Have oil siphoned. Observe all
legal requirements with re-
spect to its disposal.
2

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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Category
!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.

256 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
Category
3
(Canada
only)
;
(USA only)
ELECTRIC BRAKE BOOSTER
VISIT WORKSHOP!
The EBB has detected a malfunction
and has switched off.
The brake system is still functioning
normally but without the EBB avail-
able.

Continue driving with added
caution.

Have the system checked at
an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
Failure to follow these instructions
increases the risk of accident.
2
ESP
DISPLAY DEFECTIVE
VISIT WORKSHOP!
The ESP or the ESP display is mal-
functioning.

Continue driving with added
caution.

Have the system checked at
an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
Failure to follow these instructions
increases the risk of accident.
2

257 Practical hints
What to do if …
ESP
ELEC. STABIL. PROG.
NOT AVAILABLE
The ESP is deactivated because of a
malfunction or interrupted power
supply. The ABS might not be opera-
tional.
The system must be resynchronized.

With vehicle stationary and the
engine running, turn the steer-
ing wheel completely to the
left and then to the right to
synchronize the ESP.
If the ESP message does not go
out:

Continue driving with added
caution.

Visit an authorized
Mercedes-Benz Light Truck
Center as soon as possible.
Failure to follow these instructions
increases the risk of accident.
2
The ESP is temporarily unavailable.
The self-diagnosis has not been
completed.
The display will clear itself after
driving a short distance at more
than 12 mph (20 km/h).
The charging voltage has fallen be-
low 10 volts and the ESP has
switched off.

When the voltage is above this
value again, the ESP is opera-
tional again.

If necessary, have the genera-
tor and battery checked.
2
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258 Practical hintsWhat to do if …ESP
ELEC. STABIL. PROG.
VISIT WORKSHOP!
The ESP is switched off due to a mal-
function or an interruption in the
power supply.
The brake system is still functioning
normally but without the ESP avail-
able.
If in addition the ABS is malfunction-
ing, only partial engine output will be
available.

Continue driving with added
caution.

Have the system checked at
an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
Failure to follow these instructions
increases the risk of accident.
2
ì
FUNCTION
NOT AVAILABLE!
This display appears if button
ì

or
í
on the multifunction steer-
ing wheel is pressed and the vehicle
is not equipped with a telephone.
3
Y
HOOD OPEN!
You are driving with the hood open.

Close the hood (
page 217).
2
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Possible cause
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Category

259 Practical hints
What to do if …
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Category
I
AUTOM. LIGHT ON
REMOVE KEY!
You have forgotten to remove the
key.

Remove the key from the
starter switch.
1
REPLACE KEY
VISIT WORKSHOP!
No additional code available for
SmartKey.

Visit an authorized
Mercedes-Benz Light Truck
Center.
2
.
3RD BRAKE LAMP
CHECK LAMP!

The high mounted brake lamp is mal-
functioning. This message will only
appear if all light emitting diodes
have stopped working.

Visit an authorized
Mercedes-Benz Center as
soon as possible.
2
ADD. TURN SIG LAMP, LH
CHECK LAMP!
The left turn signal in the side mirror
is malfunctioning. This message will
only appear if all light emitting
diodes have stopped working.

Have the LEDs replaced as
soon as possible.
2
ADD. TURN SIG LAMP, RH
CHECK LAMP!
The right turn signal in the side mir-
ror is malfunctioning. This message
will only appear if all light emitting
diodes have stopped working.

Have the LEDs replaced as
soon as possible.
2
AUTOM. LIGHT ON
REMOVE KEY!
You have left the key in the starter
switch.

Remove key from the starter
switch.
1

260 Practical hintsWhat to do if …Display
Possible cause
Suggested solution
Category
.
BRAKE LAMP
VISIT WORKSHOP!
Brake lamp illumination is delayed or
lamp is permanently on.

Visit an authorized
Mercedes-Benz Light Truck
Center as soon as possible.
2
BRAKE LAMP, L
CHECK LAMP!

The left brake lamp is malfunction-
ing.

Visit an authorized
Mercedes-Benz Center as
soon as possible.
2
BRAKE LAMP, R
CHECK LAMP!

The right brake lamp is malfunction-
ing.

Visit an authorized
Mercedes-Benz Center as
soon as possible.
2
DISPLAY DEFECTIVE
VISIT WORKSHOP!
The display for the lamps or the sys-
tem is malfunctioning.

Visit an authorized
Mercedes-Benz Light Truck
Center as soon as possible.
2
FRONT FOGLAMP, L
CHECK LAMP!

The left front fog lamp is malfunc-
tioning.

Replace the bulb as soon as
possible.
2
FRONT FOGLAMP, R
CHECK LAMP!

The right front fog lamp is malfunc-
tioning.

Replace the bulb as soon as
possible.
2
HIGH BEAM, L
CHECK LAMP!

The left high beam lamp is malfunc-
tioning.

Replace the bulb as soon as
possible.
2
HIGH BEAM, R
CHECK LAMP!

The right high beam lamp is malfunc-
tioning.

Replace the bulb as soon as
possible.
2