See also:

The concept
The automatic engine start-stop function helps save fuel. The system switches off the engine during a stop, e. g., in a traffic congestion or at traffic lights. The ignition remains switched on. ...

Warning stages
Prewarning This warning is issued, for example, when there is the impending danger of a collision or the distance to the vehicle ahead is too small. Acute warning Warning of the imminent danger ...

Functional requirements
▷ There are no external sources of interference nearby. ▷ To lock the vehicle, the remote control must be located outside of the vehicle. ▷ The next unlocking and locking cycle ...