well its been in and the garage are none the wiser. these fellas seem ok though as they can hear the noise its making and dont think im mad like the other dealer.
They had the car all day and could hear it in the same conditions i can. They have had it to bits checking the usual and everything is fine... well fine as in what they checked is fine which is the usual suspects - auxilleries and pulluys.
The head tech does have some supicions and has sent a report to Fiat asking where to look next or what may need replacing, and will call me when he gets a reply, but it aint something he has come across before and neither had anyone else there.
the mystery deepens