So I had my stock head installed on my C36 and had it working w/ the Bose System and 6-Disc trunk changer perfectly for about a week. I couldn't find a bracket for my cd changer so I had a friend build one for me, meanwhile I was plugging and unplugging the changer pretty often and then... it started stuttering and now my head unit says; "E-06" Don't know what it means, I've tried everything from unplugging it a couple times to unplugging my head unit, etc... Took it to the dealership and they couldn't figure it out either. Anyone ever have this problem?