I've installed a HID kit on my 2001 A3 TQS, it looks great and works just fine. The only problem is that is causes interference with the radio. As soon as the lights are turned on, the signal drops to the radio. The radio is still there just not as strong. What puzzles me is that I have it set up on a relay, so it's completely independant of the car's main electrical system. I've tried moving the ballasts around but it doesn't help. The HID system is also fully grounded. I'm out of ideas, any thoughts?