Where to start?
On E85s, from more critical to least critical:
DISA Valve - can destroy your engine
Coolant reservoir crack - can overheat your engine
CCV valve (mine is fine, so far)
Shock absorbers are 100% sure to be done for if they are original
VANOS Seals
Door lock failure
Convertible top hinges failure / leak
Convertible top pump needs to be relocated
Prolly a good idea to change the transmission fluid - mine was gross at 90k, got much better shift quality after replacing.
Once you do these things, it's a very nice and reliable car. No one does any of that stuff, so when you buy it, be ready... :rofl: