It looks to be just above the middle of the "good" range, also it always has full pressure, I have only seen it drop down once or twice in my 4 days of driving the car, and even then it only dropped down to about 40psi or so. Would a dipstick from a '79 240D be the same length so I could compare them, I'm thinking it maybe could have been replaced at some point with one that was too long.

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1982 300D Turbodiesel, daily driver. Mods so far: Fram 8038 paper filter, 4 brake light mod, Gen II w126 (front) rotors/calipers, boost turned up to 12lbs, non-egr manifolds, water/methanol injection, 4-speed manual
1980 300SD Turbodiesel, project car, nearly ready to hit the street

1974 240D, New paint