Hey guysâ€¦I have an â€™06 S4 that came from the factory with Bose, Sirius, and Bluetooth. Iâ€™m a little new at this, so youâ€™ll have to bear with me a bit. I would like to add RNS-E to my car and of course the dealership said this would not be possible. These forms have proven otherwise. Hereâ€™s the situation: A family member has an â€™05 A4 Convertible with RNS-E with the CD changer. She doesnâ€™t want it and I DO!! I was wondering whether it would be possible to take an RNS-E and CD changer from the A4 and put it in the S4 and take the Symphony II and put in the A4. On the S4 side, I would like to keep the Sirius and Bluetooth functionality along with adding the CD changer from the A4. If this is possible, what connectors, cables and antennas would be necessary for both cars? I know this was a loaded question, but thanks for all your help.