The engine will be switched off while the
ignition stays on.
The stop-start system will be disabled on
inclines of 12% or more.
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 87
● immediately after higher speed driving
● in the case of new vehicle running-in ð
page 93
●
by active demisting
●
in the case of steep ascending or
descending slopes
●
if the vehicle has not exceeded 10
km/h since the last engine start
In these cases, the icon on the cluster
flashes a few seconds and then goes off.
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 electric
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.
Restart of the engine by the
driver
After the engine has been restarted, an
Autostop is not available until the vehicle
has reached a speed of 8 km/h.
Vehicles with manual transmission
Depress the clutch pedal without
depressing the brake pedal to restart the
engine.
Driving and operating 95