I have a 1993 MB400E That runs great until the heat gage gets to 80+. Then the engine will miss intermittently when you accelerate. Sometimes it stalls and won't start until it cools for awhile. I've tried to fix by replacing plugs, ignition wiring, injector wiring harness, oxygen sensor, fuel filter and pumps, fuel pump relay, coolant sensor, 2-pin and 4-pin coolant sensors, air injector relay. All vacuum lines were checked also.

For a DIY I've done all I can think of except go to an expert who knows what he's doing. Does anyone happen to know my problem or problems?
Thank you.

If you haven't done so, you could make a home brew 'code scanner' for pre-OBDII cars (<1995).

See here for details -

E320 16 PIN DTC Charts inc. pin 8, pin 14

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Good luck.






1998 E320 Wagon

This is one of the symptoms of a bad crankshaft position sensor IIRC.

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Jim

distributor caps are bad,arcing inside change rotors too

classic distributor cap failure

man the crazy little things those things are