Starting problems 2000 E320

[Jim F]

Good Evening: I have a 2000 E320, 2 wd, which barely starts and runs as if on two or three cylinders. If I step on the gas or put it in gear it stops running. I have replaced the fuel pump, fuel filter, cam and crank position sensors, & throttle position sensor. This last time I had the electric windows rolled down and they would not go back up, finally got them up by holding the window button part way down.

Any suggestions, nearest MB dealer is over 200 miles away in Salt Lake City.

Thanks, Jim