Can't find the nipple...

[tallgrass]

I just bought my first MB: a 1981 300D non-turbo.



I'm scratching my head trying to figure out where the black hose that comes from the oil separator is attached to the oil pan. All of the photos and diagrams I can find show a nipple on the lower oil pan, but most are for the turbo models. I poked around with a flashlight and probed around with my fingers, but didn't find anything, so I called a friend (1982 240D non-turbo) to try to find it, but he couldn't either. We couldn't find a hole or a rough spot like something had snapped off, either.

I stuck a bolt in the end of the hose and hose-clamped it for now, because it drips oil.

The number on the airfilter housing is 0010949504, the number on the driver's side of the engine is 617 011 0901.

Any ideas on what I'm missing?