Hello friends, First of all: injectors are currently working well, glow plugs, battery and all filters are new. In the diesel circuit there is no air, rail pressure control valve and sensor have already been tested. Nevertheless, the car does not have a train in higher gears. In the first and second gear it accelerates decently (which I can’t really judge, because my first smart). But from the third gear it reacts already carrier and overtake on the highway at speed 100 only works laboriously and maximum in 5th gear. The 6th gear is currently only a number for me. Because I switch to the maximum when it goes down mountain. Maximum speed is – without slope – 120 with difficulty and in 5th gear. RPM meter unfortunately I have no in the car. My search result shows a few posts where the hose is mentioned by the charging air cooler as a cause. But I found no contribution that goes more precisely to it. Could it also be the turbo? How do I exclude this for sure? How would you proceed? At the corner down left of the LLK there is some oil.