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. ...

Capacities
...

Following the initial pairing
▷ The mobile phone is detected/connected in the vehicle within a short period of time when the engine is running or the ignition is switched on. ▷ The phone book entries of the tele ...