I have a 1990 760 Gle turbo. It has a radio and tapeplayer combination. Lately, it has been cutting in and out erratically. I was thinking of replacing it, but know that it has a theft code number attached to it, that might prevent the car from starting??? I want a newer technology cd player for the car, but don't want to swap radios and have a great sound system in a car that won't run. Any ideas?