Mo pretty much summed it up: Rusty sills (square section, repair straightforward) Rusty rear arches - repair panels not available Water leaks in the boot - the normal place i rear light but also (on coupes) poorly sealed panel joins near the boot hinges. On all 800s, fuel fillers rot from above thanks to a mud trap between the filler and inner wing. It might be repairable if not too bad but you may have to fabricate something with tube/hoses. The little metal fuels pipes sandwiched between the top of the tank and the boot floor rot - the tank has to come out to fix them. Doors and all fittings are unique to the coupe - as are the seats and all other interior trim panels apart from the dash and centre console. Mechanically they are the same as any other 800. Key weak points, front suspension bottom balljoints, anti-roll bar droplinks, exhaust flexi pipes, dodgy solder joints in the fusebox, ineffective handrake (rear caliper fault - similar caliper to MGF/TF), blocked sunroof drains. The KV6 engine IS weaker than the others and expensive to fix if the headgasket goes (when rather than if?) but lovely if running OK.