My 280's power steering reservoir constantly weeps fluid down the outside of the reservoir. Cover wing nut is tight and cover gasket is new. What I don't see is where the reservoir is supposed to vent to ambient (possibly explaining why it's forcing fluid / vapors out at the cover interface). Reservoir covers on later models have an unmistakable vent just beneath the wing nut, but not so for this model. I'm guessing someone has experienced this? PS pump is original.
