Only a black screen is visible.

• Switch on the system.

There are no options available on the screen.

• Replace remote control batteries.

Radio stations or TV channels are grayed out and cannot be selected.

• Function is limited due to the selected priority.

Change priority.

The DVD does not play.

• Playback does not begin automatically. Start DVD manually.

The volume of the rear vehicle speakers cannot be adjusted.

• Sound in the rear is output via the headphones. Change priority if necessary and output sound via vehicle speakers.