The CD changer is connected via the Optic Fiber control network. You will need to use the MB one. You can get it at a reduced price from some of the online parts suppliers. There is one, that was indicated in late 2000 on this forum. You might do some searching and find it. It was an MB dealer in the NorthEast that sells parts at a cut rate. The price was good. The name started with a C.
You will need to have it put in by someone that can do it without destroying your trim and your fiber optic network.