Thanks Timmahh.. very helpful.
Is there an easy way to determine if I have the HK/L7 system? There are no markings on the faceplates or speakers, and I can't recall if there was anything in iDrive that told me I did.
I got nothing more than "No communication to CCC" from my SA, so I have no fault codes to research. I suppose I could have it hooked up again to see if there are/were any.