Thanks to all the info here IÂ´ve now installed RNS-E in my A4 B7. I did the single to double DIN conversion and it all went well. Unit is working fine navigating but my radio just wonÂ´t work. It tunes the stations just fine but the sound breaks up and then theres just noice until you here the station again for a second as if you had extremely bad reception. The very same thing happens when the nav-lady talks. She breaks up momentarely during her guidance. I havnÂ´t VAGÂ´d it yet and my previous stereo was the Concert II, non-bose. Any ideas?