Most data bus circuit, mmi 3 for Audi S4 B8 (2008-2011)

CD CHANGER, DVD CHANGER DATA BUS ON BOARD DIAGNOSTIC INTERFACE DIGITAL SOUND SYSTEM CONTROL MODULE EXCEPT PREMIUM INFORMATION ELECTRONICS CONTROL MODULE 1 LWL IN LWL OUT NCA WIRE OF CARGO AREA) OF DASH) OF TRUNK) PREMIUM RADIO TV TUNER W/ PREMIUM W/ PREMIUM, STANDARD