I've had his problem for ages where you can turn the radio right up and you can still talk to the passenger basically. I've had a guy check it with vcds as it thinks the car has the extra audio equipment installed but it doesn't. Well I think that's the problem. We try and turn the code from 1 to 0 but it basically won't let you change that part of the code. Sorry I can't remember the exact terminology would just be nice if he replied to me so I could ask him as it came out of his Jetta he told me.