SMART forfour Owner's Manual page 172

Display messages (on-board computer with monochrome display)
170
Display messages
S
S
S B
or
7 C
/
A
S B
or
7 C
/
A
Possible causes/consequences and M Solutions
Vehicles with manual transmission only: the transmission
display shows three lines.
The transmission electronics are malfunctioning or the idling
sensor is faulty.
The Start/Stop function and cruise control are deactivated
automatically.
Starting the engine is only possible with the clutch pedal fully
depressed.
X
Visit a qualified specialist workshop.
Vehicles with automatic transmission only: the transmission
display shows three lines.
The automatic transmission is malfunctioning.
X
Consult a qualified specialist workshop.
Vehicles with automatic transmission only: S flashes
/
alternately with the currently selected transmission position.
/
The automatic transmission clutch has overheated. You will
feel the clutch pedal pulsate.
X
Initially try to avoid pulling away or crawling manoeuvres.
If the display message disappears, automatic transmission
is available again.
Only for vehicles with automatic transmission: S flashes
/
alternately with the currently selected transmission position.
/
A warning tone also sounds.
Further pulling away or crawling manoeuvres have led to a
critical clutch temperature.
X
Pull over and stop the vehicle safely as soon as possible,
paying attention to road and traffic conditions.
X
Secure the vehicle to prevent it from rolling away.
X
Wait until the automatic transmission has cooled down and
the display message does not reappear after acknowledging
it.