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The driver has fastened the seat belt.
The bonnet is closed.
The driving speed was higher than 4 km.h after the last stop.
No trailer is coupled.
Some additional conditions for the system to function correctly cannot be in-
fluenced or recognised by the driver. Therefore, the system can react differ-
ently in situations which are identical from the driver's perspective.
The information as to whether the conditions are met for the automatic en-
gine shut-off, are shown in the display of the instrument cluster.
The conditions are satisfied (the engine is switched off)
» Fig. 123
START-STOP ACTIVE
The conditions are not met (the engine is not switched off)
» Fig. 123
START-STOP NOT POSSIBLE
Reasons for the engine running
Running the engine can be essential, for the following reasons.
›
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 capacity (high fan speed, big difference be-
tween the desired and actual interior temperature).
When the engine is shut-down automatically and the system detects that the
engine is required such as when the brake pedal is pressed repeatedly then
the system automatically starts the engine.
Note
If the vehicle remains outdoors for a long time in minus temperatures or in
■
direct sunlight, it can take several hours until the internal temperature of the
vehicle battery reaches a suitable temperature for proper operation of the
START STOP system.
If the driver's seat belt is removed for more than approx. 30 seconds or the
■
driver's door is opened during stop mode, the engine will have to be started
manually.
120
Driving
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.
Manually deactivating/activating the system
Deactivating/activating
›
Press the symbol button
» Fig.
When system is deactivated, the warning light in the button illuminates.
Note
If the system is deactivated when the engine is turned off automatically, then
the automatic start process takes place.
Information messages
The warning symbols are shown in the instrument cluster display.
Start engine manually!
START MANUALLY
If for example the driver's seat belt is stored, the engine must be started man-
ually.
On vehicles with the starter button the ignition is turned off by the first press
of the start button, only after pressing for the second time is the start process
initiated.
Error: Start-Stop
ERROR START-STOP
Fig. 124
Button for the START-STOP sys-
tem
124.
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