See also:

Headlamp courtesy delay feature
The low beams stay lit for a short while after the ignition is switched off, if the lamps are switched off and the headlamp flasher is switched on. Setting the duration 1. "Settings" ...

Have maintenance carried out
Have vehicles maintained regularly to achieve optimal vehicle economy and operating life. Have the maintenance carried out by your service center. Please also note the BMW Maintenance System ...

Close the windows and glass sunroof
Driving with the glass sunroof and windows open results in increased air resistance and raises fuel consumption. ...