Problem
Possible causes/consequences and
M
Solutions
Colour display:
Active Brake
Assist inoperative
or
Electronics mal‐
function Visit
workshop
appears.
Environmental influences or error sources outside the system
are temporarily interfering with Active Brake Assist and radar-
assisted recuperation. Possible causes:
R
heavy rain or snow
R
operating temperature is too high
R
on-board voltage is too low
Active Brake Assist is automatically operational again when the
causes listed no longer apply.
Warning lamp remains lit:
X
Pull over and stop the vehicle, paying attention to road and
traffic conditions.
X
Clean the sensors.
X
Restart the engine.
Warning lamp still remains lit:
X
Consult a qualified specialist workshop.
^
and
C
as well
as other warning
lamps are lit.
The central vehicle electronics system is malfunctioning.
After switching off the engine, it is no longer possible to lock or
unlock the doors using the remote control on the key or to start
the engine.
X
Pull over and stop the vehicle, paying attention to road and
traffic conditions.
X
Consult a qualified specialist workshop.
Ã
flashes for
approximately three
seconds.
A warning tone
sounds.
Colour display:
Lane
Keeping Assist
inoperative
appears.
The windscreen is dirty in the camera's field of vision.
X
Pull over and stop the vehicle, paying attention to road and
traffic conditions.
X
Clean the windscreen.
Environmental influences are interfering with Lane Keeping
Assist. Possible causes:
R
heavy rain or snow or thick fog is impairing visibility
R
the sun is low in the sky and shining directly onto the sensor
R
lane markings cannot be detected
Lane Keeping Assist is automatically operational again when
the causes listed no longer apply.
If the windscreen is clean and the causes listed do not apply,
then the electronics are malfunctioning.
The system electronics are faulty.
X
Consult a qualified specialist workshop.
206
Driver assistance systems
>> Practical advice.