Rick
I have not physically looked at the ignition switch shutoff valve. but both lines going to and from the valve do not have oil in them. Since isolating the door element and replacing all the bad rubber the car operates fine. Brakes, shutoff, remaining door elements and transmission.
The amount of oil in the vacuum pump to brake booster line was very small. I have seen cars where the lines are all black and a lot of oil is in the vacuum system. This car is not in that shape. Since my Daughter cannot take the car to Texas A&M until the Fall semester. I have time to get the car up to 100%. That way I won't have to worry about any of the systems. Plus this summer she will have to get greasy and sweat a little on her car. She will, I know that. 5 years ago when I rebuilt the driveshaft to my 300TD she was right there under the car with me. She's actually looking forward to working on her car. Our deal is that we can split the cost of a car but they have to pay for all the maintenance and diesel. This way they have so much sweat equity into the car they don't want to wreck it. It really worked with my sons 65 Mustang Fastback. He really babys the car.

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car