Just upgraded the current RNS E system installed in my B7 2007 RS4 to a later RNS E 2011 model. Physical installation was simpler than I expected as it was merely plug and play. I have the factory fitted CD changer and Bose setup. Everything works perfectly but the only problem I've encountered is that the navigation/cd/radio information no longer appears on the DIS. The top portion of the DIS is constantly blank. Is there something I've missed? Does the car need coding in order to communicate with the new RNS E unit? Does the unit need to be reset? Any help would be very much appreciated. Willing to pay any helpful soul to fix the problem. Was also looking to have Bluetooth installed into the car as well, so any recommendations for installers would be useful.