It sounds like a nice car. I recommend getting a mercedes diesel expert with experience in these older diesels to do an inspection for you. It may be worth the price or a lot less depending on a thorough checkout.

Is there documentary evidence of the true mileage?

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.