I'm assuming this is a fuel leak. It is not coming from the fuel delivery valves; I replaced the O-rings months ago, so they're new. As high up as I can see (since stuff leaks downward) is at the "STOP" lever where it attaches toward the back. I checked to see if that nut was tight, and it is. I'm not sure it's fuel, but it probably is, just burned from engine heat. It's a black sludgy kind of a look. What d'ya think?

jeff
1991 300d, 99k

Attached Thumbnails

 

Your picture is pretty small I can see what you are talking about.

If it's black and sludgy I bet it's oil. Wipe it all off and see where it is comming from and that might help you find the source and identify what the liquid is.

__________________

This is pretty common if the O-ring is original. Fortunately, it's an easy fix.

http://www.peachparts.com/Wikka/OM601InjPumpOilLeak

Yeah, I know the picture is really small. They only allow us to post 56k or something.

But I think you hit it right on the head. Oil through the stop lever. Guess I'll add that to my list of repairs.

Thanks,

Jeff