Display messages
Possible causes/consequences and M Solutions
b
Left corner. light
or Right corner.
light
The left or right-hand cornering light is faulty.
X
Visit a qualified specialist workshop.
b
Left dipped beam or
Right dipped beam
The left or right-hand dipped-beam headlamp is faulty.
X
Halogen headlamp: replace the bulb (Y page 123).
X
LED headlamp: visit a qualified specialist workshop.
Ad. Highbeam Asst.
inoperative
Adaptive Highbeam Assist is malfunctioning.
X
Switch the main-beam headlamps on/off manually.
X
Visit a qualified specialist workshop.
Ad. Highbeam Asst
unavailable
+
Adaptive Highbeam Assist is deactivated and temporarily inoperative.
Possible causes:
R
The windscreen is dirty in the camera's field of vision.
R
Visibility is impaired due to heavy rain, snow or fog.
X
Clean the windscreen.
If the system detects that the camera is fully available, the Ad.
Highbeam Asst available again message appears in the display.
Adaptive Highbeam Assist is operational again.
Act. light system
inoperative
The active light function is faulty.
X
Visit a qualified specialist workshop.
b
Trailer left turn
sig. or Trailer rt
turn sig.
The left or right-hand trailer turn signal lamp is faulty.
X
Replace the bulb (see the trailer manufacturer's operating instruc-
tions).
For trailers with LED lamps, please observe the notes on lamp failure
monitoring under "Trailer operation" (Y page 218).
b
Trailer brake lamp
The trailer brake lamp is faulty.
X
Replace the bulb (see the trailer manufacturer's operating instruc-
tions).
For trailers with LED lamps, please observe the notes on lamp failure
monitoring under "Trailer operation" (Y page 218).
b
Trailer left tail
lamp or Trailer rt
tail lamp
The left or right-hand trailer tail lamp is faulty.
X
Replace the bulb (see the trailer manufacturer's operating instruc-
tions).
For trailers with LED lamps, please observe the notes on lamp failure
monitoring under "Trailer operation" (Y page 218).
b
AUTO lights inoper‐
ative
The light sensor is faulty. The automatic headlamp feature is mal-
functioning.
X
Switch the light functions on/off manually (Y page 114).
X
Visit a qualified specialist workshop.
250
Display messages (vehicles without steering wheel buttons)
On-board computer and displays
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