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START STOP system
The basic idea of the START-STOP system is to always turn the engine off
when it does not need to be running. This feature is particularly advanta-
geous in city traffic, where this significantly reduces fuel consumption
and thereby also considerably reduces vehicle running costs.
When stopping the vehicle, an automatic engine cut-off takes place, the
warning light appears in the instrument cluster.
When starting up, the automatic start procedure takes place again.
Automatic shutdown / startup on vehicles with manual transmission
The engine is switched off as soon as the vehicle comes to a halt, the shift
lever is moved into neutral and the clutch pedal is released.
The engine is started as soon as the clutch pedal is depressed.
Automatic shutdown / startup on vehicles with automatic
transmission
The engine is switched off as soon as the vehicle comes to a halt and the
brake pedal is operated.
The motor is started as soon as the accelerator pedal is depressed or, if the
Auto Hold function is deactivated, when the brake pedal is released.
Functional prerequisites of the START-STOP system
So that an automatic engine shutdown takes place when stopping and
then an automatic start-up process during start-up, the following condi-
tions must be met.
The driver's door is closed.
The driver has fastened the seat belt.
The driving speed was higher than 4 km/h after the last stop.
Other conditions cannot be influenced or detected, these are subject to
the state of various vehicle systems and weather conditions. For this rea-
son, the START-STOP system may react differently in situations which
seem identical from the driver's perspective.
If the conditions for shutdown are not met when the vehicle stops, then
no engine shutdown takes place, the warning light appears in the instru-
ment cluster.
If, when an engine is in automatic shutdown, START-STOP system de-
tects that the engine running is essential (e.g. As in the event of an over-
loaded vehicle battery), then a premature automatic startup takes place.
Deactivation of the START-STOP system
The START-STOP system can be temporarily deactivated, by pressing the
button in the front centre console. After switching the ignition off and
on, re-activation of the START-STOP system always takes place.
Special conditions
Under certain circumstances, the vehicle can react more slowly than usual
to sudden acceleration, e.g. If the accelerator pedal is depressed at the
time of the automatic engine shutdown.
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