When I had my ford, id use the old sterio trick.
My mazda - well there was always a noise of some sort with that
And my baby Evo

- I am a little parinoid

The slightest sound and I'm round the local car garage (he only ever MOT's my car) where he will tell me what is wrong (if anything) and how to fix it. He doesn't want to touch Evo's, he just tells me what is wrong (for free) and I advise everyone to go there!!

Kind of a good deal if you ask me.