On an rnse mk1. Basically did this grey 32 pin connector 1J0 972 977 G OEM Aux-in 3.5mm plug (8J0 035 475) Then wire the 3 from the aux to the 32 pin connector and connections are Aux In Left - pin 22 of AV Connector Aux In Right - pin 6 of AV Connector Aux In Ground - pin 21 of AV Connector then coding via vcds Aux is showing but no sound coming out. My car has bose and I have seen something about switching pins. I don't know exactly what needs switching though. Does anyone know for sure if there is anything else that needs doing. It was just the aux port and wiring retrofitted. The rnse is from factory. Cheers!