Display messages Possible causes/consequences and M Solutions
b
AUTO
lights inoper‐
ative
The lightsensor is faulty.
X
Switch off the daytime driving lights in the on-board computer
(Y page 160).
X
Switch the lights on and off using the light switch.
X
Visit a qualified specialist workshop.
b
Switch off lights
The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X
Turn the light switch to $ or c.
or
X
If the rear foglamp is switched on: press the light switch in to
the stop.
Engine
Display messages Possible causes/consequences and M Solutions
;
Some electronic systems are unable to send information to the
on-board computer. The following systems may be malfunction-
ing:
R
coolant temperature display
R
rev counter
R
cruise control or SPEEDTRONIC display
X
Visit a qualified specialist workshop.
+
Top up coolant See
Owner's Manual
The coolant level is too low.
X
Top up the coolant, observing the warning notes before doing
so (Y page 211).
X
If the coolant needs topping up more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop.
174
Display messages
On-board computer and displays
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