Or just make sure her indoors doesn't join you in the car! I've only had two rattles in my car, one was a back seat not locked in place, the other was the passenger sun vizor not clipped in place.......... Can't blame Fiat for either of those.
Mines sounds like a bag of bolts going through a spin dryer atm. I blame Britain's roads as much as Fiat tho. There's only so much that can be done to hold a car together against the continual WHAM CRASH BUMP BANG of our roads