See also:

Controls
Activating Switch position with the ignition switched on. The turning lamps are automatically switched on depending on the steering angle or the use of turn signals. To avoid blinding onco ...

After the ignition is switched off
The roof can still be operated for approx. 1 minute, as long as no door has been opened. ...

Jump-starting
If the car's own battery is flat, your BMW's engine can be started by connecting two jumper cables to another vehicle's battery. You can also use the same method to help start another ...