Hi guys I have a few questions about the Concert radio in some Audi's!
Is there two different types, Concert and Concert + ?

I have found 4 different Numbers, is they all the same or what differ them apart?
4B0 035 186
4B0 035 186C
4B0 035 186E
4B0 035 186O

Is all Concert "BOSE" compatible, can I switch out my old Audi/BOSE Gamma CC to a "new" Concert in my '93 V8?

I got the impression that its NOT possible to control th 10-disc CD changer of the V8, is that correct?

Best regards
Chris