Hello, can anyone shed a bit of light on this? I bought a Xcar link ipod adaptor for my last audi which worked by piggy backing onto the CD changer. Ipod was selected by pressing CDC twice as far as i can remember. I am in the proccess of fitting it to my new audi which has the 6 disc changer within the head unit......hence no CDC button. Can the head unit recognise a external changer?