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Practical hints
What to do if …
Display symbol Display message Possible cause/consequence Possible solution
.
3rd brake lamp
The high mounted brake lamp is
malfunctioning. This message
will only appear if all light
emitting diodes have stopped
working.
̈ Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Active headlamps
inoperative
The active Bi-Xenon* headlamp
system is malfunctioning.
̈ Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
AUTO Light
inoperative
The light sensor is malfunction-
ing. The headlamps do not
switch on automatically.
̈ In the control system, set lamp operation
to manual mode (
୴ page 147).
̈ Switch on headlamps using the exterior
lamp switch (
୴ page 146).
̈ Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Brake lamp left
The left brake lamp is malfunc-
tioning. A substitute bulb is
being used.
̈ Replace the bulb as soon as possible
(
୴ page 484).
Brake lamp right
The right brake lamp is malfunc-
tioning. A substitute bulb is
being used.
̈ Replace the bulb as soon as possible
(
୴ page 484).