2004 MERCEDES-BENZ G500 light

266 Practical hintsWhat to do if …Display symbol
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Possible cause
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#
UNDERVOLTAGE
SWITCH CONSUMERS OFF!
The battery has insufficient voltage.

Have the battery checked at a ser-
vice station.
2
BRAKE WEAR
VISIT WORKSHOP!
The brake pads have reached their
wear limit.

Have the brake pads replaced as
soon as possible.
3
BRAKE FLUID
VISIT WORKSHOP!
There is insufficient brake fluid in the
reservoir.

Risk of accident! Stop the vehicle
and notify an authorized
Mercedes-Benz Light Truck Center.
Do not add brake fluid! This will not
solve the problem.
Warning!
G
Driving with the last message displayed can
result in an accident. Have your brake sys-
tem checked immediately.
Do not 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.

267 Practical hints
What to do if …
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3
ELEC. BRAKE BOOST.
VISIT WORKSHOP!
The EBB has detected a malfunction and
has switched off.
The brake system is still functioning nor-
mally but without the EBB available.

Continue driving with added cau-
tion.

Have the system checked at an au-
thorized Mercedes-Benz Light Truck
Center as soon as possible.
Failure to follow these instructions in-
creases the risk of accident.
;
(USA only)
!
(Canada only)
PARK. BRAKE
RELEASE BRAKE!
You are driving with the parking brake
set.

Release the parking brake
(page 44).

268 Practical hintsWhat to do if …Display symbol
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B
COOLANT
CHECK LEVEL!
The coolant level is too low.

Add coolant (
page 232).

If you have to add coolant frequently,
have the cooling system checked by
an authorized Mercedes-Benz Light
Truck Center.
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
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 112).

270 Practical hintsWhat to do if …Display symbol
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Ï
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. Otherwise
the engine will overheat due to an in-
operative water pump which may re-
s u l t i n d a m a g e t o t he e n g i n e . N ot i f y a n
authorized Mercedes-Benz Light Truck
Center.
If it is in order:

Do not continue to drive the vehicle
with this message displayed. Doing so
could result in serious engine damage
that is not covered by the
Mercedes-Benz Limited Warranty.
COOLANT
VISIT WORKSHOP!
The cooling fan for the coolant is malfunc-
tioning.

Observe the coolant temperature dis-
play (
page 112).

Have the fan replaced as soon as pos-
sible.

271 Practical hints
What to do if …
When the
ADD 1.0 QT. ENG. OIL
-
WHEN
NEXT REFUELLING!
(Canada:
1.0 LITER
)
message appears while the engine is run-
ning and at operating temperature, the en-
gine 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 obvious oil
leaks are noted, drive to the nearest ser-
vice station where the engine oil should be
topped to the required level with an ap-
proved oil.
Display symbol
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Ñ
CRUISE CONTROL
DRIVE TO WORKSHOP!
Cruise control is malfunctioning.

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

Close the doors.
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.
:
USA only:ADD 1.0 Qt. ENGINE OIL
WHEN NEXT REFUELING!Canada only:ADD 1.0 LITER ENG. OIL
WHEN NEXT REFUELING!
The engine oil level is too low.

Add engine oil (
page 231) and check
the engine oil level (
page 229).
!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.

272 Practical hintsWhat to do if …Display symbol
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:
ENGINE OIL LEVEL
REDUCE OIL LEVEL
!
You have added too much engine oil.
There is a risk of damaging the engine or
the catalytic converter.

Have oil siphoned or drained off. Ob-
serve all legal requirements with re-
spect to its disposal.
ENGINE OIL LEVEL
STOP, ENGINE OFF!
There is no oil in the engine. There is a
danger of engine damage.

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

Turn off the engine.

Add engine oil (
page 231) and check
the engine oil level (
page 229).
ENGINE OIL
VISIT WORKSHOP!
It may be that there is water in the engine
oil.

Have the oil checked.
ENGINE OIL LEVEL
VISIT WORKSHOP!
The engine oil has dropped to a critical
level.

Check the engine oil level
(page 229) and add oil as required
(page 231).

If you must add engine oil frequently,
have the engine checked for possible
leaks.
The measuring system is malfunctioning.

Have the measuring system checked
by an authorized Mercedes-Benz Light
Truck Center.

273 Practical hints
What to do if …
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A
RESERVE FUEL
GO TO GAS STATION
The fuel level has dropped below the re-
serve mark.

Refuel at the next gas station
(page 224).
CHECK GAS CAP
SEE OPERATOR’S MANUAL
The fuel cap is not closed tightly.

Check the fuel cap (
page 224).
Y
HOOD OPEN!
You are driving with the hood open.

Close the hood (
page 228).
I
REMOVE KEY!
You have forgotten to remove the Smart-
Key.

Remove the SmartKey from the starter
switch.
REPLACE KEY
DRIVE TO WORKSHOP!
No additional code available for Smart-
Key.

Visit an authorized Mercedes-Benz
Light Truck Center.

274 Practical hintsWhat to do if …Display symbol
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Possible cause
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.
3RD BRAKE LIGHT
CHECK LIGHT!

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

Visit an authorized Mercedes-Benz
Center as soon as possible.
ADD. TURN SIG., L
CHECK LIGHT!
The left turn signal in the exterior rear
view mirror is malfunctioning. This mes-
sage will only appear if all light emitting
diodes have stopped working.

Have the LEDs replaced as soon as
possible.
ADD. TURN SIG., R
CHECK LIGHT!
The right turn signal in the exterior rear
view mirror is malfunctioning. This mes-
sage will only appear if all light emitting
diodes have stopped working.

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

Remove the SmartKey from the starter
switch.
BRAKE LIGHT
DRIVE TO WORKSHOP!
Brake lamp illumination is delayed or
lamp is permanently on.

Visit an authorized Mercedes-Benz
Light Truck Center as soon as possi-
ble.
BRAKE LIGHT, L
CHECK LIGHT!

The left brake lamp is malfunctioning.

Visit an authorized Mercedes-Benz
Center as soon as possible.