Been oozing life for 5 years even though I change the gasket to new for every valve adjustment. Since I am feeling flush at this time, I sprang for a factory MB gasket ($21.50 at AhAz).

First thing I noticed was that it seemed heavier in weight than the aftermarket gaskets. Second thing was how tightly it fit onto the cover. In past, I used assembly grease to hold the gasket in place while working it onto the head. No need to this time. After start-up and a test run, I think the typical left rear corner leak is gone.

In this case boys, buy the real thing is my advice.

Whoops; 1983 300CD w/OM617.