Well, after 6 months of irritation, the rattling fault has now been resolved.
I've had it in to Fiat who fixed the top strut mounts/droplinks/bump stops - yet the rattle continued.
Yesterday, whilst I was in the engine bay filling up the what not's I closed the bonnet lid and noticed that "rattle" - wasn't the flaming rattle only the bonnet rubber bump stops on each side that had been screwed too tight so that there was play on the bonnet catch.
A couple of turns to loosen them, and et voila - no rattle.
I'm in the process of invoicing myself for labour charges and exploratory computer analysis.

I've had it in to Fiat who fixed the top strut mounts/droplinks/bump stops - yet the rattle continued.
Yesterday, whilst I was in the engine bay filling up the what not's I closed the bonnet lid and noticed that "rattle" - wasn't the flaming rattle only the bonnet rubber bump stops on each side that had been screwed too tight so that there was play on the bonnet catch.
A couple of turns to loosen them, and et voila - no rattle.
I'm in the process of invoicing myself for labour charges and exploratory computer analysis.