[Benziger]

Hello everyone, great forum.

I was just checking the condition of my air filter today ('67 w108 250se) and for the first time removed both inner segments. Things looked pretty good except for a brown oily sludge right at the bottom. Is this normal?
Not knowing quite what to do, I wiped it out with a towel and put a nominal amount of clean oil back in the bottom...
I did notice that there is a line going from the top of the engine to just in front of the intake manifold; is this designed to deposit oil through the filter so it can collect dirt more easily?

Any info is appreciated..

Thanks,
Benziger