Hello Bernadette,
I have the same problem in my car BMW e39 1996, I want to try to solve it today & I will inform you.
Before I have small problem in the memory of the audio when I am switching on the car the audio will not be balance all it will be on the left side and front, so I went to one shop while I was in Jordan and he helped me in 20 min just removed the old memory and installed new one its now ok.
But I have the problem of the CD now
Mashal
November 2008