Bill,
I consider the secondary pump (and the ability to roll start because of it) a great feature in my car. I'm disappointed to hear that it didn't work for you. Was it that the engine didn't go into gear and turn over or did the engine fail to start once it was turning over?
Having often used this technique on standard shift vehicles I always considered not being able to do this a big disadvantage in an automatic. Of course MB solved the problem.