SMART EQ forfour Owner's Manual page 203

Problem
ative Electronics
or
malfunction Visit
workshop
appears.
^ and C as well
as other warning lamps
are lit.
à flashes for
approximately three
seconds.
Warning tone sounds.
Lane
Colour display:
Keeping Assist inop‐
erative
appears.
Possible causes/consequences and M Solutions
Environmental influences or error sources outside the system are
temporarily interfering with Active Brake Assist and radar-
assisted recuperation. Possible causes:
heavy rain or snow
R
operating temperature is too high
R
on-board voltage is too low
R
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.
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.
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:
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
R
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.
System electronics are faulty.
X
Consult a qualified specialist workshop.
Driver assistance systems
201
Z