Mercedes-Benz GL-Class 2012 Owners Manual - Manual (Page 243)

G WARNING
If the 42 indicator lamp remains lit with an adult occupant on the front-passenger
seat even after performing the above corrective steps, do not have any passenger use the front-
passenger seat until the system has been repaired.
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
Cornering Lamp
Left or Cornering
Lamp Right
The left or right-hand cornering light is defective.
X Check whether you are permitted to change the bulb yourself
(
Y page 123).
or
X Visit a qualified specialist workshop.
b
Low Beam Left
or Low Beam Right
The left or right-hand low-beam headlamp is defective.
b
Trailer Tail Lamp
Left or Trailer
Tail Lamp Right
The left or right-hand trailer tail lamp is faulty.
X Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop.
b
Trailer Turn
Signal Left or
Trailer Turn
Signal Right
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
Trailer Brake Lamp
The trailer brake lamp is defective.
X Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop.
b
Turn Signal Rear
Left or Turn Signal
Rear Right
The rear left-hand or rear right-hand turn signal is defective.
X Check whether you are permitted to change the bulb yourself
(
Y page 123).
or
X Visit a qualified specialist workshop.
Display messages
241
On-board computer and displays
Z