I just purchased (well, not yet built) a 2002 SLK AMG 32. I want to install an aftermarket head unit because I hate CD changers in the trunks. Yesterday I learned all about the proprietary BOSE/MB fiber optic bus data network. Is there any adapter or anything that I can do to install a third party vendor's head unit? I'm not much interested in FM modulation either. Please HELP!!!!