I picked up my car ('03 S3) last week and love it. I have a couple of questions that are probably easily answered

First, I listen to Five Live (MW) a lot on the radio (until I get the iPod kit fitted) and I find that whenever the signal's a bit weak, or it could be when I go under overhead telephone lines, under bridges etc, the stereo squeals/whines. In fact when I turn off the engine it stops. I have the Bose fitted and the NavPlus Sat Nav head unit, is it likely that I need a suppressor or is there another fix?

Secondly, does anyone know if I can get traffic monitoring setup for my Sat Nav? I see it mentioned in the book but nothing definite saying how to set it up or use it.

Thanks in advance