Driving and operating 107
During an Autostop, the heating,
power steering and brake
performance will be maintained.
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.
Otherwise an Autostop will be
inhibited.
■ The stop-start system is not
manually deactivated
■ the bonnet is fully closed
■ the driver's door is closed and the
driver's seat belt is fastened
■ the 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
■ the climate control system allows
an Autostop
■ the self-cleaning function of the
diesel particle filter is not active
■ the vehicle has moved since the
last Autostop
■ the brake vacuum is sufficient
■ the windscreen wipers are not
operating at fast speed
■ reverse gear is not selected
■ heated rear window is not operating
Ambient temperature near to the
freezing point can inhibit an Autostop.
For manual transmission automated
vehicles, an Autostop may be
inhibited until a speed of approx.
10 km/h is reached.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 104.
Battery discharge protection
To ensure reliable engine restarts,
several battery discharge protection
features are implemented as part of
the stop-start system.
Restarting the engine
Manual transmission
The selector lever must be in neutral
to enable an automatic restart.
Depress the clutch pedal to restart the
engine.
Manual transmission automated
If the lever is in position N, select
another gear, otherwise release the
brake pedal or move the lever to +, –
or R to enable an automatic restart.
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop
during the restart may be noticeable.
Restarting the engine with the
key
When one of the following conditions
occurs during an Autostop, the
engine will need to be restarted
manually using the key.
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