See also:

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

Maintaining/storing the speed
Press the button*. When the system is switched on, the current speed is maintained and stored as the desired speed. It is displayed in the speedometer and briefly displayed in the instrument ...

External devices
Overview AUX-IN port Overview> It is possible to connect audio devices, e.g. MP3 players. Sound is output over the vehicle speakers. > Recommended settings: mid-level tone and volume settin ...