See also:

Aerodynamic optimisation of underside panelling
As the excellent drag coefficient (cd = 0.26) would suggest, the aerodynamics of the new BMW 3-Series have been intensively honed in a state-of-the-art wind tunnel. The optimised aerodynamics also ...

Interior and exterior mirrors, automatic dimming feature
Interior and exterior mirrors, automatic dimming feature Two photocells are used for control: ▷ In the mirror glass, see arrow. ▷ On the back of the mirror. For proper operation: ...

Activating HDC
Press the button; the LED above the button lights up. ...