shawnster, absolutely a job you can do once you know what the part is. Why pay somebody else to do the lefty loosy righty tighty stuff? If nobody with this engine chimes in then you may need to make a good investment and buy the service CD (also helps keep this web site going). That CD is going to tell you where the oil pressure relief valve is. You may also get lucky and only have to pull the fan and shroud. For what it's worth, my CD says that's the first place you look if the engine front is leaking oil.

mplafleur, the part no. for mine is 114 180 02 15, as of 8/6/92 which is the date on the part bag tag (say that five times really fast). It's two inches long, of which the threads are about 1/4in deep. The wrench end looks like 17/32in across the flats by about 3/8in deep. The wrench end also has a hole about 3/16in diameter. The valve body itself looks like 25/32in diameter (it's snowing today and I'm too lazy to go out and get the metric wrenches - I don't know why I have this part in the house).

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daBenz - 1970 220D