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If the button cell in the vehicle key is weak or
discharged, it is possible that the vehicle key will
not be recognised.
In this case it is necessary to perform an emer-
gency start:
– Depress and hold the brake pedal.
– Hold the vehicle key to the right of the steer-
ing column trim directly after pressing the
starter button
Fig.
84.
→
– The ignition is switched on automatically, and
in some cases the engine is started.
Engine cannot be switched off
The engine cannot be switched off by briefly
pressing the starter button.
In this case, it is necessary to perform an emer-
gency switch-off procedure:
– Press the starter button twice within a few
seconds or press and hold once.
The motor switches off automatically
Starter button on page 96.
Engine cannot be started
A corresponding message will be displayed in the
instrument cluster if an unauthorised vehicle key
is used or there is a system fault.
– Use an authorized vehicle key.
– If the fault persists, seek expert assistance.
Start/stop system
Fig. 85 In the upper part of the centre console: but-
ton for the start/stop system.
The start/stop system automatically switches the
engine off when the vehicle is coming to a stop
and when stationary. When required, the engine
restarts automatically.
Switching on the start/stop system
The function is automatically activated every
time the ignition is switched on. The instrument
cluster display will show information about the
current status.
Always switch off the automatic engine start/
stop system when driving through water.
Indicator lamps
If the indicator lamp lights up, the start/stop
system is available and automatic engine stop is
active.
If the indicator lamp lights up, the start/stop
system is not available or the start/stop system
has started the engine automatically
The display on the instrument cluster may show
the status of the start/stop system.
Vehicles with a manual gearbox:
– Disengage the gear and release the clutch
pedal when the vehicle is coming to a stop, or
in
→
when it is stationary. The engine stops.
– Depress the clutch pedal to restart the engine.
Vehicles with an automatic gearbox
– To stop, press and hold the brake pedal when
the vehicle is stationary.
– To restart the engine, take your foot off the
brake pedal or depress the accelerator.
Important preconditions for automatic engine
switch-off
– The driver is wearing the seat belt.
– The driver door is closed.
– The bonnet is closed.
– A minimum engine temperature has been
reached.
–
Vehicles with Climatronic:
vehicle interior is within the preset tempera-
ture range, and the humidity level is not too
high.
– The defrost function of the air conditioning
system is not switched on.
– The charge level of the 12-volt vehicle battery
is sufficient.
– The temperature of the 12-volt vehicle battery
is not too low or too high.
– The vehicle is not on a steep incline.
–
Vehicles with an automatic gearbox:
wheel is not turned too sharply.
page 100.
→
the temperature of the
the steering
Driving
99
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