I've been trying to locate someinformation on retorfitting bluetooth to my 06 B7 A4. I don't have navigation and am not planning on installing it. I would just like to add the bluetooth functionality. My questions are is it possible wioth OEM parts and if so what are the part numbers. I've been told by the dealer that it can't be done but I don't have much faith in them. Any help would be greatly appreciated. Also I beleive I have the Symphony 1 head unit. Thanks, in advance.