See also:

Units of measure
Setting the units of measure To set the units for fuel consumption, route/distance and temperature: 1. "Settings" 2. "Language/Units" 3. Select the desired menu item. ...

The concept
The automatic engine start-stop function helps save fuel. The system switches off the engine during a stop, e. g., in a traffic congestion or at traffic lights. The ignition remains switched on. ...

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. ...