Hello all, I have an intermittent power loss problem with my C250td which brings the EPC light on. When the light is on the cars acceleration really suffers, I have given the air temp sensor a clean, checked the vac pipes for splits, checked the Map sensor with a multimeter and given the vac system for the turbo wastegate a once over. Just a bit stumped now as all the things I have checked are what I have found from searching on here. Hoping someone can help before I pull the little remaining hair out of my noggin. thanks Pete.