I have a 2001 S-Type 4.0 with the Premium Audio, I am getting horrible radio reception through the antenna embedded into the rear window. The sound system is fine, CD's aren't a problem. When I put the radio on, it is fine when the car is stopped, but when I start moving I get static, volume changes, and lots of fuzz. Anyone else have this problem and know if there is ANYTHING I can do about it?