Page 308 of 416
308 Practical hintsWhat to do if …Ï
COOLANT
VISIT WORKSHOP!
The cooling fan for the coolant is
malfunctioning.
Observe the coolant temperature dis-
play (
page 120).
Have the fan replaced as soon as pos-
sible.
Ñ
CRUISE CONTROL
VISIT WORKSHOP!
Cruise control is malfunctioning.
Visit an authorized Mercedes-Benz
Light Truck Center.
J
DOOR OPEN!
You are attempting to drive with one ore
more doors open.
Close the doors.
e
ENGINE AIR FILTER
VISIT WORKSHOP!
The engine air filter is clogged and must
be replaced.
Visit an authorized Mercedes-Benz
Light Truck Center as soon as possi-
ble.
Display symbol
Display message
Possible cause
Possible solution
Page 309 of 416
309 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 specified in the Factory
Approved Service Products pamphlet.
Display symbol
Display message
Possible cause
Possible solution
:
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 243) and check
the engine oil level (
page 240).
!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.
Page 310 of 416
310 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
:
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 243) and check
the engine oil level (
page 240).
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 240) and add oil as required
(page 243).
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.
Page 311 of 416
311 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
A
RESERVE FUEL
GO TO GAS STATION
The fuel level has dropped below the re-
serve mark.
Refuel at the next gas station
(page 235).
CHECK GAS CAP
SEE OPERATOR’S MANUAL
A loss of pressure has been detected in
the fuel system. The fuel cap may not be
closed properly or the fuel system may be
leaky.
Check the fuel cap (
page 235).
If it is not closed properly:
Close the fuel cap.
If it is closed properly:
Have the fuel system checked by an
authorized Mercedes-Benz Light Truck
Center.
Y
HOOD OPEN!
You are driving with the hood open.
Close the hood (
page 239).
I
REMOVE KEY!
You have forgotten to remove the
SmartKey.
Remove the SmartKey from the starter
switch.
REPLACE KEY
DRIVE TO WORKSHOP!
No additional code available for
SmartKey.
Visit an authorized Mercedes-Benz
Light Truck Center.
Page 312 of 416
312 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
.
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
Light Truck 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
possible.
BRAKE LIGHT, L
CHECK LIGHT!
The left brake lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
Page 313 of 416
313 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
.
BRAKE LIGHT, R
CHECK LIGHT!
The right brake lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
FRONT FOGLIGHT, L
CHECK LIGHT!
The left front fog lamp is malfunctioning.
Replace the bulb as soon as possible.
FRONT FOGLIGHT, R
CHECK LIGHT!
The right front fog lamp is malfunctioning.
Replace the bulb as soon as possible.
FR. L. PARK. LAMP
CHECK LIGHT!
BACK-UP LIGHT ON!
The left parking lamps are malfunction-
ing. A backup bulb is being used.
Replace the bulb as soon as possible.
FR. R. PARK LAMP
CHECK LIGHT!
BACK-UP LIGHT ON!
The right parking lamps are malfunction-
ing. A backup bulb is being used.
Replace the bulb as soon as possible.
HIGH BEAM, L
CHECK LIGHT!
The left high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
HIGH BEAM, R
CHECK LIGHT!
The right high beam lamp is malfunction-
ing.
Replace the bulb as soon as possible.
Page 314 of 416
314 Practical hintsWhat to do if …Display symbol
Display message
Possible cause
Possible solution
.
LIGHT SENSOR
DRIVE TO WORKSHOP!
The lamp sensor is malfunctioning. The
headlamps switch on automatically.
In the control system, set lamp opera-
tion to manual (
page 137).
Switch on headlamps using the
exterior lamp switch (
page 110).
Visit an authorized Mercedes-Benz
Light Truck Center as soon as possi-
ble.
LICENSE PLATE LIGHT, L
CHECK LIGHT!
The left license plate lamp is malfunction-
ing.
Replace the bulb as soon as possible.
LICENSE PLATE LIGHT R
CHECK LIGHT!
The right license plate lamp is malfunc-
tioning.
Replace the bulb as soon as possible.
LIGHTS
TURN OFF LIGHTS!
The display appears if the driver’s door is
opened with the engine shut off and no
SmartKey in the starter switch.
Insert SmartKey in the starter switch.
Switch off the lights (
page 110).
LOW BEAM, L
CHECK LIGHT!
The left low beam lamp is malfunctioning.
Visit an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
LOW BEAM, R
CHECK LIGHT!
The right low beam lamp is malfunction-
ing.
Visit an authorized Mercedes-Benz
Light Truck Center as soon as
possible.
Page 315 of 416
315 Practical hints
What to do if …
Display symbol
Display message
Possible cause
Possible solution
.
MARKER LIGHT, FL
CHECK LIGHT!
The left front side marker lamp is mal-
functioning.
Replace the bulb as soon as possible.
MARKER LIGHT, FR
CHECK LIGHT!
The right front side marker lamp is mal-
functioning.
Replace the bulb as soon as possible.
REAR FOGLIGHT
CHECK LIGHT!
The rear fog lamp is malfunctioning.
Replace the bulb as soon as possible.
REAR FOGLIGHT
TURN OFF
BACK-UP LIGHT ON!
A lamp is malfunctioning. A backup bulb
is being used.
Turn the rear fog lamp off.
REVERSE LIGHT, R
CHECK LIGHT!
The right backup lamp is malfunctioning.
Replace the bulb as soon as possible.
TAIL LIGHT, L
CHECK LIGHT!
BACK-UP LIGHT ON!
The left tail lamp is malfunctioning.
A backup bulb is being used.
Replace the bulb as soon as possible.
TAIL LIGHT, R
CHECK LIGHT!
BACK-UP LIGHT ON!
The right tail lamp is malfunctioning.
A backup bulb is being used.
Replace the bulb as soon as possible.
TURN SIG., LF
CHECK LIGHT!
BACK-UP LIGHT ON!
The left front turn signal lamp is malfunc-
tioning. A backup bulb is being used.
Replace the bulb as soon as possible.
