if the battery had been disconnected at some point , when re connectting the BATTERY , am i right i thinking , that the "RADIO" will have to be re set ???? ( hence no music ?)
as the idiot above has said, its possible the radio will need a code to be entered,before working,cutting the power off by disconnecting the battery,will cause it not to work.look in your handbook the code might be in there,if not contact AUDI.
Joe, dont worry about laughing at Norm's answers, me and my mates at work really enjoy the entertaining endless stream of either blatently obvious or mis informed posts from old Norm.
It is said, a little knowledge is a dangerous thing.