odie, to start off, get yourself the two new diesel filters (the small plastic one and the larger screw-on filter)

Also check out my thread of the new primer pump, its well worth it and its cheap:

Engine wants to turn off on idle


Also:

You don't need to replace the gasket, just get the new primer pump, it comes with a new gasket. Like someone mentioned here it's around $12 and it is a BOSCH brand part totally re-designed so you can't go wrong. Also, like they mentioned on here, it's alot better to get stuff for these Mercedes online like at FASTLANE or RUSTY. (I dont work for neither of these two companies) Local autoparts do not carry this stuff.

Thanks,
Adiel