Mercedes-Benz R-Class Owner's Manual page 273

Practical advice
Display messages
Display messages
B
Top up coolant See
Owner's Manual
.
Left-hand Corner-
ing light
or
Right-hand Corner-
ing light
.
Left-hand dipped
beam
or
Right-hand dipped
beam
.
AUTO lights inop-
erative
.
Trailer Left-hand
turn signal
or
Trailer Right-hand
turn signal
270
Possible cause/consequence
The coolant level is too low.
The left-hand and/or right-hand cornering
lamp* is faulty.
The right-hand or left-hand dipped-beam
headlamp is faulty.
The light sensor is faulty. Constant head-
lamp mode is switched on.
There is a malfunction in the left- or right-
hand windowbag.
Possible solution
Top up the coolant, observing the warning
X
notes before doing so ( page 223).
Y
Have the coolant system checked at a qualified
X
specialist workshop if the coolant needs top-
ping up more often than usual.
Replace the bulb ( page 306).
X
Y
Halogen headlamp: replace the bulb
X
( page 306).
Y
Bi-xenon headlamp*: visit a qualified special-
X
ist workshop.
Switch the lights to manual control in the on-
X
board computer ( page 132).
Y
Switch the lights on and off using the light
X
switch.
Replace the bulb.
X
* optional