Rattle behind right shoulder

Seem to have developed a rattle/tizz sound coming from behind my right shoulder when driving, particularly noticable when changing lanes and crossing over cats eyes, seems to resonate!
Had it back to the dealer who took the seat belt pillar trims off, didn't find anything.
I think it is in the seat itself, anyone else had similar?
Its a coupe so has the seat catch at the top.

Do you have a sunroof? If so does it make the same sound if its open. I found mine made a vibrating noise somewhere around where the blind closes in above your head.

(27-03-2013 11:30pm)Rootsboy Wrote:  Do you have a sunroof? If so does it make the same sound if its open. I found mine made a vibrating noise somewhere around where the blind closes in above your head.

Yeah got the pano roof, I will try driving with blind open and closed see if it makes any difference, thanks.