[SMJ4]

I recently bought a Porche Boxster 3.2S (2002)that has a Becker CR22 radio/cassette/CD changer installed. The car did not come with an audio manual so I am having difficulty programming the stations. To add to the problem the display screen does not illuminate in daylight and in night time only pushes out a very dim red colour with no actual display on the screen. Any help would be much appreciated. Thanks