I would suggest you to look for a nice, clean low mileage 420SEL or 560SEL with service history. These are really great cars as I have 3! 2 560SEL and 1 420SEL. My 560SEL has 29k miles and 150k miles respectively. My 420SEL that I just got has on 55k miles. You wont go wrong with the W126. Sure they have their own quirks but if you find one really nice with low mileage and service history, I say go for it! Btw- these cars are easier to work on then the much newer ones. I think that after 1991 Mercedes has went down with reliability and I know alot of people with TONS of problems with their Benzes after 1992.