how to replace cd player

First, even a non-functioning CD player may be perfectly good if there is a problem with the MOST network. Second, when you replace any part on the MOST net, it requires coding and sometimes programming, therefor you will need factory diagnostic computer. The MOST is a fiber optic network, if you accidently break the line the cost of the harness is $6000+ and the labor is about $3000. I'd suggest to leave this work for a BMW specialist or the dealer. Zee