Close the windows and glasssunroof
Driving with the glass sunroof and windows open results in increased air resistance and raises fuel consumption.
See also:
The concept
The parking brake is primarily intended to prevent
the vehicle from rolling while parked; it
brakes the rear wheels.
...
At a glance
1 Control button
2 Mirror display ...
Activating HDC
Press the button; the LED above
the button
lights up. ...