Hi, My Audi a4 b7 came with a RNSE satelitie navigation factory fitted, I was wondering what I need to fit the dension 500 and is it possible? My main concern atm is how to hook up the CD changer since my car already has the Quad connector, anyone any ideas on this? A picture guide would be appreciated! Is this MULTIMEDIA INTERFACE AUDI RNS-E A3 A4 A6 adapter 0003 | eBay UK all I need? to fit IPOD?