I just had that problem on my '92 300CE. After replacing the crankshaft sensor it turned out to be my EZL, which I replaced. No problems since then but I don't know if you have one on that model year.

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Norm K.
'97 E420 Sport
'06 E350 Sedan
'67 Mustang Coupe
'70 F-250
'15 VW Jetta