So I got 3.8 m5 -92 and it's got options
662 BMW BAVARIA C PROFESSIONAL RDS
676 HIFI LAUTSPRECHERSYSTEM
from the factory.
I already bought bmw business cd rds from ebay but unfortunately it doesn't work because bavaria c professional rds has somekind of receiver in the right side of trunk (
RealOEM.COM * BMW E34 M5 3.8 RADIO BAVARIA C PROFESSIONAL) and hence different cable wiring than the business cd would demand. Happened to notice it a little too late, though.

So I assume that the only way to get cd-option with oem parts to my car is to purchase a cd changer, right?
Since the 6-cd changer seems to be more common, I think I'll give it a try.
So I need to get the right parts (
connection cable cd-changer [65128359266],
interface cd-changer [65128355803] [
RealOEM.COM * BMW E34 M5 3.8 SINGLE COMPONENTS CD-6 CHANGER] and of course
the changer itself, apparently made by pioneer?.) and then plug the interface part to the cd-changer and the changer to the receiver device using the connection cable. So it's that simple? Sorry for the long writing but this time I want to be sure that I get the right parts.