I bought a '96 328is two months ago and there is a problem with the aftermarket Alpine cd player. When the radio is playing all the speakers play but when a cd is playing, only the speakers on the passenger side play. I messed with the settings on the Apline unit and the Fader is set to zero and the Balance is set to zero. I first thought that maybe the wiring might be screwed up but to me it dont make sense. It dont make sense to me becasue when the radio plays, u get music from all the speakers. When you switch to cd, only the right side plays. I have time this week so i am going to pull out the radio and see how everything is hooked up. I just would like some suggestions as to what to look for or if anyone had a problem similar to this with any of their cars. Also, I think the owner before had a amp installed because there is a piece of 4 gauge wire in the trunk. I dont know if he installed the amp himself and screwed up something on the headunit. Everyone's input would be appreciated on this topic because i think this problem might take me a while to figure out. If i cannot fix the problem i guess i will get a new cd player and hopefully that will solve the problem.