Congrats! You've purchased an excellent sounding vehicle. As someone who has restored a 76 W115 240D and a 84 W123 300D, I can share that there are several smaller things you can do to ensure smooth and reliable operation.

I've tried to document alot of these in my thread. There are a few lesser known things like the Overflow Spring, injector nozzles and lift pump that you should pay attention to once you get the service items out of the way.

Feel free to PM questions or ask here.

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Why I will never do business with "DieselKraut" again

http://www.peachparts.com/shopforum/mercedes-benz-used-parts-sale-wanted/378935-why-i-will-never-do-business-dieselkraut-again.html