Low Sulfur Fuel Problems?

[bops1231]

I've still working my way through a very dirty fuel tank in my '82 240D (190k). The tank has been flushed, strainer replaced, etc. After one tank of fuel, the primary fuel filter was black, so I replaced both the primary and secondary filters. Now I'm getting air locks, and have to bleed the engine to start it.

I think the current problem may be caused by the Napa fuel filter I installed (since I had run out of the German ones). I don't think it is seating properly on the housing.

I just went to a "Black Forest Motors" shop locally, and bought a set of German fuel filters (Mahle KC-22 for the cartridge). In the process, I asked if anyone was having problem with the new low sulfur fuel (<15ppm). "Oh yes, lots more fuel and air leaks. We're doing a lot of work on that these days."

Anyone here experiencing anything like that with the new commercial fuel?

John Bonds
Charleston SC