My 92 400E does not like puddles or slush on the road. It dies, but then I can always restart it right away. I am thinking lower harness, water in the distributor cap, or throttle body wiring. Upper harness is new. My belly pan is missing-never came with the car.

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1992 400E current
1988 300E sold
1973 280C totalled
1973 280SEL never got it running
1971 250C my first love but rusted out