SMART forfour Owner's Manual page 201

Problem
^ Yellow warning
lamp lights up while
driving.
Dis‐
Colour display:
tance warning inop‐
erative Electron‐
or
ics malfunction
Visit workshop
appears.
^ Yellow warning
lamp lights up while
driving.
Active
Colour display:
Brake Assist inoper‐
ative Electronics
or
malfunction Visit
workshop
appears.
^ and C as well
as other warning lamps
are lit.
Possible causes/consequences and M Solutions
The sensors in the radiator trim are dirty.
X
Clean the sensors.
Environmental influences or error sources outside the system are
temporarily interfering with the forward collision warning. Pos-
sible causes:
heavy rain or snow
R
operating temperature is too high
R
on-board voltage is too low
R
Forward collision warning is 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.
The sensors in the radiator trim are dirty.
X
Clean the sensors.
Environmental influences or error sources outside the system are
temporarily interfering with Active Brake Assist and radar-based
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.
Driver assistance systems
199
Z