I was having some fuel leakage from the thermostatic valve, deleted it, and gained relief. Now the little cavity on the motor mount is filling up again + leaks on driveway. I can only guess it's from fuel system components just above.

I'm using HPR, I imagine that's what's doing it. I'm hoping the viton will do the trick.

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1986 300SDL, 362K
1984 300D, 138K