When I had my 350 roadster, I had problems with the roof, and Nissan warranty, I called them, they said that the roof is not covered under any warranty and is actually classed as.........TRIM, go figure
So I explained that the TRIM actually keep the inside of the car dry and therefore cant be called TRIM, it was like talking to a brick wall. So, in their opinion, the roof has nada to do with the bodywork at all.
Clutch, general wear N tear I think they will put it down to.