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Conditions for the system function
The following conditions are required for the correct system function.
The driver's door is closed.
The driver has fastened the seat belt.
The driving speed exceeded 4 km/h after the last stop.
No trailer or other accessory is connected to the trailer socket.
System status
The system status is shown on the display » Fig. 208 when stopped.
The engine is automatically switched off; when driving off again, the en-
gine is started automatically.
The motor is not automatically switched off.
The engine does not shut down when the vehicle stops, if e.g. the following
applies.
▶
The engine temperature for the proper function of the system has not yet
been reached.
▶
The charge state of the vehicle battery is too low.
▶
The current consumption is too high.
▶
High air conditioning or heating output (high fan speed, big difference be-
tween the desired and actual interior temperature).
If the engine has shut down automatically but the system detects that the en-
gine is required to run (e.g. if the brake pedal is pressed repeatedly) then the
system automatically starts up the engine.
More information about the current system status can be displayed in the In-
fotainment screen, in the
→
→
Vehicle status
menu.
If there is a system fault, the following message will appear in the display of
the instrument cluster. Seek help from a specialist garage.
Note
■
If the driver's seat belt is removed for more than 30 seconds or the driver's
door is opened after the engine has switched off automatically, the engine will
have to be restarted manually.
■
No automatic engine shut-down takes place when a vehicle with automatic
transmission is moving at low speed (e.g. during a traffic jam) and remains sta-
tionary after pressing the brake pedal lightly. Automatic engine shutdown
takes place if you press the brake pedal down with more force.
■
For vehicles with automatic transmission there is no automatic engine shut-
down when the system detects a manoeuvring action due to a large steering
angle.
Deactivate/activate the system manually
Fig. 209
Button for the START-STOP sys-
tem
›
To deactivate/activate the system, press the
button» Fig. 209.
When the system is deactivated, the symbol in the button lights up
.
If the system is deactivated, then it is automatically activated again after
switching the ignition off and on.
Note
If the system is automatically deactivated when the engine is turned off, then
the automatic start process takes place.
167
Starting-off and driving
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