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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 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.
AUTO-Light
inoperative
The light sensor is malfunctioning.
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
(
୴ page 151).
̈ Switch off the headlamps using the
exterior lamp switch (
୴ page 117).
Brake lamp
left
The left brake lamp is malfunctioning. ̈ Replace the bulb as soon as possible
(
୴ page 385).
Brake lamp
right
The right brake lamp is malfunctioning. ̈ Replace the bulb as soon as possible
(
୴ page 385).