Malfunction

HDC is temporarily unavailable in the following situations due to a high brake temperature:

▷ The LED in the button and the display HDC go out during HDC operation.
▷ The LED in the button and the HDC display do not light up when the button is pressed.

    See also:

    Deactivating HDC
    Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

    Saving a function
    1. Highlight the function via the iDrive. 2. Press the desired button for more than 2 seconds. ...

    Multi-channel playback, surround
    Setting multi-channel playback, surround 1. "CD/Multimedia", "Radio" or "Settings" 2. "Tone" 3. "Surround" Surround When surround is activate ...