I'm located in Utah, a small place called Eagle Mountain. I have some neighbors who have lots of experience with cars and engines (and lots of things) in general, not Mercedes but... you know. As for the miles... I can't be sure, odometer says about 70k right now, PO said it was replaced at 70K and my title says the odometer reading is "exempt" :\ I would guess that it has more than the 140k but... I just don't know.
What factory manual do you suggest, a CD? Or Book? I dunno where to get it...
Is relaping the valves changing the valve stem seals, and if not should I do that? What about replacing the valve guides, valve keepers, cam follower, or prechamber. Are there valve springs, and should they be replaced?
Do these cars need valve adjustments and should I do a timing adjustment?
There's a lot I don't know about all this, and right now I'm shakin in my boots

but I hope to get someone to help me.
And thank you for the help so far. Guess I need to start ordering parts and get this show on the road. Hope I blow up my car