See also:

BMW Assist or ConnectedDrive
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Start/Stop button
The concept Pressing the Start/Stop button switches the ignition on or off and starts the engine. Automatic transmission: The engine starts if the brake is depressed while pressing the Start/ ...

Switching off automatically
The system switches off and the LED goes out: After approx. 160 ft/50 m when driving forward. Above approx. 22 mph/36 km/h when driving forward. Switch on the system again if necessary. ...