Hi! For some time now it sounds as if a cylinder is running louder, which makes itself felt in an ‘unround’ running noise. However, the engine runs round (no jerking or drop-off). When it is cold you notice it especially. I suspect that one of the injection nozzles is not quite ok anymore. How long do they normally hold? I have now about 160Tkm down, but only long distance (tempomat). I have seen that a cable is connected in a valve (2-adrig). I have little experience with diesel. But before I bring the car into the workshop I prefer to know what’s going on. They change everything at my expense. wait for your answer Greeting PROF