2008 MERCEDES-BENZ R320 light

455 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.3rd Brake LampThe high mounted brake lamp is
malfunctioning. 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.
Active Headlamps
InoperativeThe active Bi-Xenon* headlamp
system is malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
AUTO Light
InoperativeThe light sensor is malfunction-
ing. The headlamps switch on
automatically.Contact an authorized 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 144).
Switch off the headlamps using the
exterior lamp switch (
page 143).
Brake Lamp
LeftThe left brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 480).
Brake Lamp
RightThe right brake lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 480).

456 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.Cornering Lamp
LeftThe left corner-illuminating front
fog lamp is malfunctioning.Replace the bulb as soon as possible
(
page 480).
Cornering Lamp
RightThe right corner-illuminating
front fog lamp is malfunctioning.Replace the bulb as soon as possible
(
page 480).
Front Foglamp
LeftThe left front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).
Front Foglamp
RightThe right front fog lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).
High Beam
LeftThe left high beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 480).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
High Beam
RightThe right high beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 480).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

457 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.License Plate Lamp
LeftThe left license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).
License Plate Lamp
RightThe right license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).
Low Beam
LeftThe left low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 480).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Low Beam
RightThe right low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 480).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

458 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.Marker Lamp
Front LeftThe left front side marker lamp is
malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Marker Lamp
Front RightThe right front side marker lamp
is malfunctioning.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Parking Lamp
Front LeftThe front left parking lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 480).
Parking Lamp
Front RightThe front right parking lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 480).
Foglamp
Rear LeftThe left rear fog lamp is malfunc-
tioning.Replace the bulb as soon as possible
(
page 480).
Reverse Lamp
LeftThe left backup lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).
Reverse Lamp
RightThe right backup lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).

459 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
. Switch Off LightsYou have removed the SmartKey
from the starter switch and
opened the driver’s door or
removed the SmartKey with
KEYLESS-GO* from the vehicle
and left the parking lamps or the
rear fog lamp on.Turn the exterior lamp switch toM
(
page 143).
Tail Lamp
LeftThe left tail lamp is malfunction-
ing. A substitute bulb is being
used.Replace the bulb as soon as possible
(
page 480).
Tail Lamp
RightThe right tail lamp is malfunc-
tioning. A substitute bulb is
being used.Replace the bulb as soon as possible
(
page 480).

460 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
. Turn Signal
Rear LeftThe left rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 480).
Turn Signal
Rear RightThe right rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 480).
Turn Signal
Front LeftThe left front turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 480).
Turn Signal
Front RightThe right front turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 480).
Turn Signal
Left MirrorThe turn signal in the left exte-
rior rear view mirror 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.
Turn Signal
Right MirrorThe turn signal in the right exte-
rior rear view mirror 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.

461 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
4Reserve FuelThe fuel level has gone below the reserve
mark.Refuel at the next gas station
(
page 352).
Ultra Low-sulfur
Diesel Fuel OnlyVehicles with diesel engine only:
The fuel level has gone below the reserve
mark.Refuel at the next gas station
(
page 352).
Only use commercially available
vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL
(15 ppm SULFUR MAXIMUM).
L Tele Aid
InoperativeOne or more main functions of the
Tele Aid* system are malfunctioning.Have the Tele Aid* system checked
by an authorized Mercedes-Benz Light
Truck Center.
Tele Aid
BatteryThe emergency power battery for the
Tele Aid* system is malfunctioning. If the
vehicle battery is also malfunctioning or
drained, Tele Aid* will not be operational.Have the Tele Aid* system checked
by an authorized Mercedes-Benz Light
Truck Center.
tFunction
unavailableThis display appears if
buttontorson the multifunc-
tion steering wheel is pressed and the
vehicle is not equipped with a telephone.
WTop Up
Washer FluidThe fluid level has dropped to
about1/3of total reservoir capacity.
Add washer fluid (page 362).

464 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
n*Vehicle Rising
Wait BrieflyThe vehicle level is too low.Do not drive off.
The vehicle level control* has not yet
adjusted the vehicle level to the necessary
height required for driving.
Wait until the message disappears from the
multifunction display.
You may then drive off.
STOP
Car Too LowYou have driven off while the vehicle level
was too low.The AIRMATIC* should have raised the vehicle
to the set level after a short while. While the
message is displayed:
Avoid large steering angles. Otherwise a
fender or tire could be damaged.
Do not drive faster than 50 mph (80 km/h).
If the message does not disappear from the
multifunction display:
Have the system checked at an authorized
Mercedes-Benz Light Truck Center.