Hi I have an 04 BMW 325i wagon e46 and I had the stock radio in my car when I got it and all of a sudden 6 months later my radio volume knob stop working and my battery went dead ... Got a new battery and still no radio so I went online and got one from someone on the internet and then my radio work for a week and then my battery went dead again...So thinking it was the stock head units I went and got an aftermarket one and a after market wireing harness and antenna kit and installed it and everything works for a week and my car is dead again took out fuses #7 5amp and #41 30amp fuses and my car works fine for months and dosent die ... but no radio ?????? Any ideas or solutions for me to check any information is helpfull I think I have a draw but don't know where to look or what wires to check ????