I just picked up an '08 R32 with factory nav. It also has the OEM ipod adapter in the armrest and OEM bluetooth installed. When I push CD on the headunit I get the CD1, CD2, etc. that corresponds to the playlists on the ipod. There is also and 'AUX' setting and when I select it I get nothing. Is this for another adapter that can be hooked up to the headunit? Or is there another input in the car hiding somewhere already?