Installed a CD changer into the '04 S over the weekend. Works fine except things were not quite as they were depicted in the instructions.
Anyway. The controls are on the back side of the steering wheel. On the left side are buttons to control volume and to select either the Cassette, Radio or CD player (middle button). I cannot determine what the purpose of the middle button on the right side of the steering wheel is for. Nothing seems to change when it is depressed and the manual only addresses the middle button (number 6) on the left side.
Anyone know?