Autostop
Vehicles with manual transmission
Activate an Autostop as follows:
● Set the selector lever to neutral.
● Release the clutch pedal.
Vehicles with automatic transmission
If the vehicle is at a standstill with
depressed brake pedal, Autostop is
activated automatically.
The engine will be switched off while the
ignition stays on.
The stop-start system will be disabled on
steep inclines.
Indication
An Autostop is indicated by control
indicator
.
During an Autostop, the heating and
brake performance will be maintained.
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 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 not too low
or too high.
● The climate control system allows an
Autostop.
● The brake vacuum is sufficient.
● The self-cleaning function of the
exhaust filter is not active.
● The vehicle was driven at least at
walking speed since the last Autostop.
Autostop will be inhibited if these
conditions are not met. In addition,
Autostop may be inhibited
● by certain settings of the climate
control system
ð page 63
● immediately after higher speed driving
● in the case of new vehicle running-in
● by active demisting
● in the case of steep ascending or
descending slopes
Note
The Autostop may be inhibited for
several hours after a battery replacement
or reconnection.
Vehicle battery discharge protection
To ensure reliable engine restarts,
several vehicle battery discharge
protection features are implemented as
part of the stop-start system.
Power saving measures
During an Autostop, several electrical
features such as auxiliary electric heater
or rear window heating are disabled or
switched to a power saving mode. The
fan speed of the climate control system is
reduced to save power.
80 Starting and operating
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