I have a Dension 500 unit from my 2006 A6 (worked fine). According to Dension the same unit will be Ok in my new (2009) A5 which has factory fitted Nav and standard radio MMI . Now re-fitted, the ipod isnt recognised when connected. Strangely, if I start a track playing then plug it into the Dension unit I can see the tracks on the MMI screen and control via the MMI (but only for single tracks - no albums or playlists have more than a single track to play). Once I power off, the unit isnt picked up again. All software on the ipod and Dension are bang up to date. The installation company seem to be stuck on this problem and Dension are trying to ''replicate the problem'' . Anyone had this problem or better still found a solution ?