I had this problem to, got stuck in Vegas for 3 days while the dealer worked on it. They fixed it, I drove off and the car stalled 400 yards from the dealer. After getting the car back, it was determined that it was the fuel pump relay.
2000 C230 Kompressor
1988 190e 2.3 - 225K miles, owned for 7 years. I cannot say enough good things about this car. Very well built, even at 225 it ran like new.