I've just bought an Audi with the standard Concert head unit and a Kenwood 6 disc changer. The changer isn't working though. It cycles through all six discs and decides there aren't any discs present. I have a Nakamichi CD45z to go in the car and I've been trying to find out if it is compatible with Kenwood changers. Can anyone help? I want to know if I can use the changer before I decide to bin or repair it.