See also:

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

Starting navigation system
1. Press the button on the controller. 2. "Navigation" The navigation system can also be accessed directly with the button on the controller. ...

Switch off the engine during longer stops
Switch off the engine during longer stops, e.g., at traffic lights, railroad crossings or in traffic congestion. Fuel savings are achieved after the vehicle is switched off for only approx. 4 s ...