Ok. A quick update. 1990 300D with 2.5 turbo. 602.962. Vacuum leaks and leaking from injection pump side plate.
1. The vac leaks turned out to be a cracked vacuum amplifier and two bad hoses (one from EGR to transducer and one from wastegate transducer to wastegate valve controller).
2. EGR, wastegate valve, and vacuum control flap all operational with Mity-Vac and seem to operate as designed with r/r of above defective items.
3. 0-60 time of appxly 12 seconds now, and starts, idles and shifts like a champ.
4. Please see the attached photos of the leaks on the side of the injection pump. I did, carefully, replace the gasket. It leaks as much now as before the new gasket. Used no sealant. Gasket was exact size of the old one and was from local MB dealership, so part#'s seemingly matched. I circled in red the leaking areas, and on one photo drew an arrow to a barrel shaped part extruding from the end of the IP. Is this where the internal shaft terminates as it moves back and forth? I noticed oil or fuel (?) would deposit quickly on the shaft where it enters the barrel shaped part as I moved it when the side plate was off. The car accelerates quickly, no apparent additional exhaust noticeable or change in exhaust color. But a definite increase in diesel fuel smell as you walk up to the car and the obvious seepage noticeable in the photos. Any suggestions on possible problems any repairs appreciated. I truly hope the seeping is a "replace gaskets" job, whether I tackle it or have it done. Thanks again, vespucci

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