SMART forfour Owner's Manual page 199

Problem
h Yellow warning
lamp flashes for
approximately
60 seconds and then
remains lit.
Tyre
Colour display:
pressure monitor
inoperative wheel
sensors missing
appears.
J Red warning lamp
is lit.
÷, ! Yellow
warning lamps light up
while the engine is
running.
Warning tone sounds.
Elec‐
Colour display:
tronics malfunction
Stop See Owner's
Manual
appears.
Possible causes/consequences and M Solutions
There is no signal from the tyre pressure sensor of one or more
wheels.
G
WARNING
Risk of accident due to undetected tyre pressure losses. The sys-
tem is possibly unable to recognise or register low tyre pressure.
X
Consult a qualified specialist workshop.
Wheels have unsuitable tyre pressure sensors.
X
Fit wheels with suitable tyre pressure sensors.
The following systems are malfunctioning:
ABS (anti-lock braking system)
R
®
ESP (Electronic Stability Program)
R
Crosswind Assist
R
Hill start assist
R
Further driving systems could be switched off automatically.
G
WARNING
The risk of skidding and having an accident increases due to
malfunctioning driving safety systems.
The brake system functions normally, but without the systems
listed. The wheels could therefore lock if you brake hard,
for example.
This will greatly impair the ability to steer and brake. The brak-
ing distance may increase in emergency braking situations.
X
Pull over and stop the vehicle, paying attention to road and
traffic conditions.
X
Consult a qualified specialist workshop.
Driving safety systems
197
Z