engine losses spark after it warms up
starts again once it has cooled on 1990 Mercedes-Benz 300E

starts fine when cold
checked fuel pressure its good
losses spark when warm and just dies

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2 answers
It's probably the ignition module in the distributor failing, if it is faulty it will produce these exact symtoms. I happens when the motor warms up and the distributor is warm enough. Good luck! Gymover
check the crank shaft sensor