Thanks, you guys confirmed my skepticism. I did have the car towed to another place this morning. When I described the problem he knew exactly what I was talking about and said mine is the third car in a month that had this problem. He said it may have to do something with a reformulation of diesel.

MB Doc. The first shop said they tested the voltage at the shut off valve and found it not within spec. They said they bypassed the computer and had the car running without stalling. Based on that, they came to the conclusion that the computer was bad. ($311.00 diagnosis). They still could not give me a good reason why the lines where filled with air.

I will of course keep all you posted.
Thanks Again