Hey guys,


So I just got my W123 Diesel all sorted of oil leaks when I notice an alarming leak coming from my moms W210 1998 E320 with the M112. I pulled it up on ramps and could see oil dripping off of various lines, but could not find the cause.

I did some research and found a great deal of people who had encountered the oil test cover gasket leaking, and described similar oil leak symptoms. If you're not familiar with it, there is a little port cover bolted onto the front of the block just below the oil filter housing and just above the serpentine tension pulley.

I went out and wiped this little cover part clean, as it was filthy all around it. I ran my finger along it afterwards and had no oil on my finger. I then started the engine, and walked back around and ran my finger on the same spot. In the few sec it took me to get over there, my finger was now covered in fresh, hot oil.

I'm happy as this is a simple, inexpensive part to fix. However, in all of the reading I did on it, no one has a part # for it and I can't find one. Anyone out there who's done this job have the part # for the gasket to the piece and the little crush washer for the center bolt?

Thanks!

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1984 Mercedes-Benz 300D