See also:

Deleting all stored programs
Press the two outer memory buttons for approx. 20 seconds until the LED flashes rapidly. All stored programs are deleted. The programs cannot be deleted individually ...

Controls
Almost all functions can be operated in the same manner as they are in the front. Special features of operating the system in the rear are described here. ...

Opening the favorites
If an activated favorite is played back, the following message appears for approx. 20 seconds: "Favorite alert!". "Favorites" Select the symbol while the message is shown. ...