Well I found it, 92 500 SEL with the Silverstone changer. MY four year old battery was cranking slow, would not hold a charge, I assumed it was on its way out. Mercedes came out and installed a new one. I opened the trunk tonight and heard a whirring noise, the CD player was running, you could not eject the cartrige. The ignition switch was off, the fuse in the font would not disable it, the fuse in the back did but nothing would work. It was remove it and unplug the power wire, and while I was at it I removed the whole thing!