[gimp]

My '06 T&C Ltd CD Changer & iPod interface can no longer be selected using the CD/Aux button on the RB1. It's under extended warranty so I took it to the dealer and they replaced the CD Changer. Still doesn't work. Any suggestions?

 

[ImperialCrown]

Welcome to Allpar. Did it ever work after the CD changer replacement? Does 'AUX' show in the display when you select the button? Did the dealer witness this occur with your iPod and did they ask to have your iPod kept with the van for their diagnosis? What exactly was their diagnosis?
Maybe try a battery disconnect, pause, reconnect to see if possibly the logic is locked up? Reset your clock afterwards.