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 when the Start/Stop button is pressed.
Manual transmission: the engine starts if the clutch is depressed when the Start/Stop button is pressed.
See also:
Messages after trip completion
Special messages that are displayed during
driving are displayed again after the ignition is
switched off. ...
Requirements
▷ Equipment version with full preparation
package mobile phone.
An Emergency Request can be made, even
if no mobile phones are paired with the vehicle.
▷ BMW Assist is activated.
...
Preparation
1. Check whether the battery of the other vehicle
has a voltage of 12 volts and approximately
the same capacitance in Ah. This information
can be found on the battery.
2. Switch off the engine ...
