i really appreciate all of the responses

all of the vacuum lines have been checked and replaced within the last month, the vacuum transduceres were replaced because they were found to be faulty, they worked fine for two days, then the computer quit sending a signal to the wastegate transducer, when the transducers dont get any signal, they dump all of the vacuum that is being supplied to them, (so ive been told) so vacuum is lost throughout the entire system.

right now i have the vacuum line going to the 3 transducers disconnected and plugged so that my transmission, a/c and rear headrests will work properly. both my local shop and the dealership have told me this and i have tested it myself with my own mityvac at home, so im afraid the problem isnt as cheap and easy as replacing a vac line.

oldsouth had the vacuum operated wastegate switched out on his car with a regular pressure actuated one so that he could remove his EGR, his car is newer than mine so this made me think that doing this in my car would solve the problem, and i have a strong feeling that it will.

all of the shops i have approached about doing this either dont know how, or wont do it for whatever reason, but now it looks like oldsouth is going to help me find the right part to do this to my car, which is great.

id like to know if anyone else has had a problem like this that they solved in an unusual way, or if anybody thinks that this might not work for some reason.

thanks

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1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350