Hey guys, Iâve been scouring the forums looking for a proper thread, but I havenât found an exact match, so Iâm creating this one. I apologize if this has been answered before. First off, I have a 2007 Audi A3 3.2L S-line Quattro with the Symphony II (I believe) audio system and Bose speakers, but no BT or Satellite radio. What I want to do is retrofit (1) an RNS-E, (2) BT and (3) a satellite radio, with OEM parts (and I would like the U.S. versions of those parts, not the European versions, if they are different). Iâm not looking for a guide, but I was hoping someone could confirm all of the parts that I would need, and confirm that everything is compatible, and where I could acquire the parts if possible. RNS-E retrofit For the RNS-E retrofit, I suspect that everything I need will come in this package, correct? Bluetooth retrofit Iâm not mistaken, these are the parts that I would need for the BT retrofit: PHONE INTERFACE BOX: 8P0 862 335 J MICROPHONE: 8L1 862 373A ANTENNA: 8P0 035 503E Harness (?) Is that correct? Anything else Iâm missing? Do I need another harness besides the one that comes in the RNS-E retrofit package I mentioned above? Is so, can someone link to it for me? Satellite radio retrofit Satellite radio receiver: 8E0035593D or 8E0035593D Harness (?) I am assuming that the antenna that comes with the RNS-E retrofit package I linked to above is all that I would need. Would I also need another harness as well? Thanks!