Hi, Just a few questions on the RNS-E unit, there is one being sold locally and I am tempted to purchase. My car is a 2003 A4 B6 Model. Firstly - do they require a keycode when installed in a different car? The seller stated he didnt need one when it was installed into his car. Secondly, I upgraded my headunit from the Symphony II to the Symphony II+ last year, I purchased a quadlock conversion loom from Kufatec to do this - Will this loom work for the RNS-E? Thanks!