Pm you a question about this
I used to have this setup in my 04' GLI. I have since sold the car. I have all components plus the adapter that plugs into the 6 disc CD changer harness in the trunk that converts it to AV outputs so it plays through the cd output on the factory stereo instead of the FM modulated signal.
Asking $40 shipped to the lower 48
PM me if interested. Pay pal only.
Thanks for looking