Those were the same symptoms I had prior to my fuel pump failure. More intermittent than Larry's problem.
Surprising is this would go 2 years without escalating, however.
I was not able to remove the filter screen at the bottom of the tank for cleaning- corroded in place for good! I imagine the screen (if fouled) could cause this, or Larry's problem as well.
There is also that pressure balancing device next to the filter and the pump. This could certainly cause Larry's symptoms, though I'm not sure if it could cause intermittent problems. Not sure if these are prone to failure...
1986 300E 5-Speed 240k mi.