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The engine will be switched off while
the ignition stays on.
An Autostop is indicated by the
needle at the AUTOSTOP position in
the tachometer.
During an Autostop, the heating and
brake performance will be
maintained.
Caution
The power steering assist may be
reduced during an Autostop.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled:
● The stop-start system is not
manually deactivated.
● The bonnet is fully closed.
● The driver's door is closed or the
driver's seat belt is fastened.
● The vehicle battery is sufficiently
charged and in good condition.
● The engine is warmed-up.
● The engine coolant temperature
is not too high.
● The engine exhaust temperature
is not too high, e.g. after driving
with high engine load.
● The ambient temperature is
above -5 °C.
● The climate control system
allows an Autostop.
● The brake vacuum is sufficient.
● The self-cleaning function of the
diesel particle filter is not active.
● The vehicle was driven at least at
walking speed since the last
Autostop.
Driving and operating
Otherwise an Autostop will be
inhibited.
Certain settings of the climate control
system may inhibit an Autostop. See
"Climate control" chapter for more
details 3 160.
Immediately after motorway driving,
an Autostop may be inhibited.
New vehicle running-in 3 168.
Vehicle battery discharge protection
To ensure reliable engine restarts,
several battery discharge protection
features are implemented as part of
the stop-start system.
Power saving measures
During an Autostop, several electric
features, e.g. auxiliary electric heater
or heated rear window are disabled or
switched into a power saving mode.
The fan speed of the climate control
system is reduced to save power.
Restart of the engine by the driver
Depress the clutch pedal to restart the
engine.
171
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