See also:

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

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" ...

Remove unnecessary cargo
Additional weight increases fuel consumption. ...