I just had some work done to my 97 A8, one being a new battery installed, timing belt, water pump, gaskets replaced...After these completions my mechanic pulled out the car from the garage and noticed that the sunroof just apparently opened for no reason and would not shut, he was able to take the sunroof motor out and reset...I guess this is a comon problem when replacing the battery if the previous battery was really low...after the sunroof problem was fixed, now the radio does not turn on when pressing the on/off button, shows no display (not even SAFE) the radio buttons light up when the lights are on...we looked at the fuse panel located near the floorboard of the passenger side but of course the fuses where not labeled, checked some of them, had no luck, the radio was working fine with no problems two weeks ago...any ideas or thoughts, thanks.

 

FYI - The fuse in the back of the stereo head was blown. When we put the good fuse in the radio came on, didn't even resort to SAFE mode, stereo works now.