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154 Driving and operating
Caution
The steering assist can be
reduced during an Autostop.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled.
â– The stop-start system is not
manually deactivated
â– the bonnet is fully closed
â– the driver's door is closed or the
driver's seat belt is fastened
â– the vehicle battery is sufficiently
charged and in good condition
â– the engine is warmed up
â– the engine coolant temperature is
not too high
â– the engine exhaust temperature is
not too high, e.g. after driving with
high engine load
â– the ambient temperature is above
-5° C
â– the climate control system allows
an Autostop
â– the brake vacuum is sufficient
â– the self-cleaning function of the
diesel particle filter is not active
â– the vehicle was driven at least at
walking speed since the last
Autostop
Otherwise an Autostop will be
inhibited.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 134.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 149.
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 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.
Restart of the engine by the
driver
Depress the clutch pedal to restart the
engine.
The engine start is indicated by the
needle at the idle speed position in
the tachometer.
If the selector lever is shifted out of
neutral before depressing the clutch
first, control indicator - illuminates
or is shown as a symbol in the Driver
Information Centre.
Control indicator - 3 102.
Restart of the engine by the
stop-start system
The selector lever must be in neutral
to enable an automatic restart.
If one of the following conditions
occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system:
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