well I assume you took it al rallye, and yes the cd changer would be incompatible with an aftermarket headunit... go over some of the things I listed in the previous post, like plugging, and unplugging the changer, check all the related fuses and post your results... the battery they mentioned is an interal component of the radio.... if the radio is at fault and you really wanna fix it then I suggest you contact becker of NA and sent them the radio for repair... the becker 1432 is a two piece radio, head unit at the front, connected to a receiver at the back.... but like i said before the first thing to check (especially since the car has been sitting for so long) are the fuses for the audio system... take all of them out and check them... they may just have some corrosion on them...

p.s cool I'm also on LI...

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95 M3 (US)
94 318is (EURO)
87 190E 2.6