first the car is fuel injected right? second you are talking of the ignition distributor, correct?

i have an 84 280e euro.

mine was doing something similar. after it was warm it would run very rich. using twice the normal amount of fuel. it turned out to be the warm up enrichment compensator. the igintion was unaffected i think. i also believe that the part is the same for us cars.

best i can do. good luck.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.