I got a CD Cartridge player in trade for next to nothing. I thought from the part numbers, A002 820 7989 Model MC3098 that I would be able to put it in my "C". I found the wiring in the trunk and the optical cable fits but the power connector does not. The plug in the car has a 4 pin connector, slightly larger than the 3 pin in the player (same shape, however). I think the player came out of an "M" model. I also checked in the glovebox, since I heard some of them were installed in there, but this unit does not fit in the upper shelf. It doesn't look encouraging, but wonder in anyone can suggest a way to make it work.