See also:

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

The concept
The following can be operated using the buttons and the thumbwheel on the steering wheel: Current audio source. Redial on telephone*. Activation of the voice activation system*. ...

Advanced BMW EfficientDynamics technology puts the new BMW 1-Series in a class of its own
Back in 2007, the BMW 1-Series set a new global benchmark, with a unique range of technologies to reduce fuel consumption and emissions being included as standard. Today, the new BMW 1-Series exte ...