97 E300D delivery valve leaks

[123boy]

Started smelling fuel and noticing small spot on garage floor when parked. Recently changed main fuel filter and pre. Problem started after that. No leaks prior. Related or coincidence? Might have other leak areas but cant see anything due to the big honkin intake. Could also have a clear line, or two, leaking. Or the shutoff valve, or IP itself. Guess the intake is comin off, no matter what. The question I have is: Doesnt the fuel system need to be pressurized to find the leaks? Cant run the engine with the intake off, so....? Ordered the 33 spline socket and stoppin at the dealer today for seals and crush washers. Do I correctly recall reading the washers are hard to locate? Or, was that for the w cars? Guessin this pump is different from my w123, yes? Bought the E300 in October and it's just not givin me that "warm fuzzy feeling" like my 240D. Beginning to think I made a mistake...gettin to be a PITA