At that mileage if it is for real, it would have about had to have had nearly no oil changes to have heavy wear as you have described.

I agree with the previous recommendations, get a PPI by an experienced mercedes diesel mechanic and try to verify the mileage. Certainly don't pay extra on the claimed mileage and judge the car by its condition.

At this age condition is everything.

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[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.