Hold the phone! Car Runs!!

Last Saturday, I freed the plate, plugged in the connector back into the fuel distro, and car runs like it always has -- rough idle, hesitation, Difficult hot start, and intermittent stumble at cruise. Dealer said it needs the fuel distro (per MB spec tests). If anyone can give me less expensive things to look at, I'd be grateful.

Replaced:
OVP
Pump relay
Fuel filter
Cap & Rotor
Plugs & Wires
Air Filter
All fluids
Considering Fuel Pump Check Valve and Accumulator.

Did a double shot of dry gas last night (1 bottle treats 10-20 gallons, so I put in 2) -- seems to help??! I've heard about moisture in the fuel distro. Can dry gas get it out?

__________________
David
1986 300E Anthracite + ECodes + MB Mileage Award