Time out! Before you spend a slug of dough, or you take a lot of things apart...try the "old standby"...it's worked for me and it's worked for many others.
With the cartridge in the changer, simply bang on the changer with your hand 2-3 times. I'm not kidding!! It can really work. Must move something around, or re-align something.
I read about this on another board a few months ago. I tried it and it worked. I've had no problems since.
<span style='color:green'>1994 325i </span>- - - 75,000 mi.
No mods - - - very happy as is!
<span style='color:green'>1995 525i </span>- - - 154,000 mi.
No squeaks or rattles... unreal!