Hello! I just got a major transmission (manual), clutch, and flywheel repaired on my Audi 97 A4 Quattro. The car's radio was working well, before the repair, now the radio has "SAFE", when I turn it on. I don't have a "code", since I bought it used about a year ago. The previous owner moved out of the country. some one said to me that the code might be in the trunk, by the spare tire. Others tell me I need a code. Could you please guide me in the right direction? It's been a week with no music on my car, plus the whole month of feb on the shop. tHANK YOU.