Mercedes-Benz GL-Class 2013 Owners Manual - Manual (Page 301)

Display messages Possible causes/consequences and M Solutions
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the ^a indicator lamp remains lit
or goes out depends on how OCS classifies the occupant.
If the conditions are not fulfilled, the system is not operating
correctly.
X
Visit a qualified specialist workshop immediately.
Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed.
Display messages Possible causes/consequences and M Solutions
b
Check Left
Cornering Light or
Check Right
Cornering Light
The left or right-hand cornering light is defective.
X Check whether you are permitted to replace the bulb yourself
(
Y
page 133).
or
X Visit a qualified specialist workshop.
b
Check Left Low
Beam or Check
Right Low Beam
The left or right-hand low-beam headlamp is defective.
X Check whether you are permitted to replace the bulb yourself
(
Y
page 133).
or
X
Visit a qualified specialist workshop.
b
Check Trailer Left
Turn Signal or
Check Trailer
Right Turn Signal
The left or right-hand trailer turn signal lamp is defective.
X Check whether you are permitted to change the bulb yourself.
or
X
Visit a qualified specialist workshop.
b
Check Rear Left
Turn Signal or
Check Rear Right
Turn Signal
The rear left-hand or rear right-hand turn signal is defective.
X Check whether you are permitted to replace the bulb yourself
(
Y
page 133).
or
X Visit a qualified specialist workshop.
Display messages
299
On-board
computer
and
displays
Z