See also:

Trailer towing
PARKTRONIC is deactivated for the rear area when you establish an electrical connection between your vehicle and a trailer. Fold in the ball coupling if the trailer tow hitch is not required. ...

Brake fluid
WARNING Over a period of time, the brake fluid absorbs moisture from the air; this lowers its boiling point. If the boiling point of the brake fluid is too low, vapor pockets may form in t ...

Showing/hiding the menu
This function is not available while the DVD's own menu is being displayed. To show: press the COMAND controller. or Select Menu while the navigation menu is shown and press to confirm. ...