Any Mercedes W126 (S class 1979-1991) owners out there? Just looking for some non-rabid (e.g., not on a W126 board) real-world experience and feedback. I'm close to pulling the trigger on one of a few 350SDLs. Ultimately it'll be converted into a greasecar. I want to put 200K+ miles on it and just want to make sure I know what I'm getting into . TIA, Doody.