will not start

:banghead: 1989 300e....has good spark ,fuel getting into cylinders, not even a hint of start, even tried starting fluid nothing.........is crank position sensor a suspect or the sensor just a check/ fine tune thing

I had a similar problem a couple times on my 87 190e....different things both times. The first time it turned out to be a disconnected vacuum line. The second time the electrical connection to the fuse box had wriggled itself loose.