Mercedes-Benz 2008 M-Class Operator's Manual page 439

Practical hints
What to do if ...
Display symbol Display message
.
3rd Brake Lamp
Active Headlamps
Inoperative
AUTO Light
Inoperative
Brake Lamp
Left
Brake Lamp
Right
438
Possible cause/consequence Possible solution
The high mounted brake lamp is
malfunctioning. This message
will only appear if a critical num-
ber of LEDs have stopped work-
ing.
The active Bi-Xenon* headlamp
system is malfunctioning.
The light sensor is malfunction-
ing. The headlamps switch on
automatically.
The left brake lamp is malfunc-
tioning. A substitute bulb is
being used.
The right brake lamp is malfunc-
tioning. A substitute bulb is
being used.
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
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 136).
Switch off the headlamps using the
exterior lamp switch ( page 135).
Replace the bulb as soon as possible
( page 471).
Replace the bulb as soon as possible
( page 471).