1982--280sl
 

I have a 280sl--1982--gray market.The car has developed a hesutation after about 30 minutes oof driving.Its fine when cold.I have replaced the fuel pump and filter--no change.I have also replaced the plugs and wires.wwhen you press down on the accelorator---after about 30 minutes--it will keep on hesitating.At a high speed----70---it does not hesitate(after its warm--hesitation iis just from a standing positiion-----any suggestions?