Hello, I have a Megane 2 1.6, 16V. He now has 77000 down and makes a loud “rrrrrr” noise at the cold start. Unfortunately only rarely and whenever he wants. I have meanwhile changed the camshaft adjuster and the sensor, because it was said it came away. It didn’t come, at least still there. Then you changed the starter, also it didn’t come from it. I really don’t know any more. I just describe. So whether it’s cold, wet or warm, if it was standing for some time, mac If he hears the sound every few days at irregular intervals, it takes 2-3 seconds, then it goes away and everything is ok. The engine runs like a one. I start it afterwards, it starts normal, always. Mussed like a cat. Recently, when he does it, the engine soon goes to his knees, or out. I start it afterwards, runs and starts it quite normally. The light in and on the car flickers a few times, as if he had little juice, but only a few minutes. After that, no matter when I start it, he starts n ormal. The engine never makes noises, is not loud and drives top. He does it if only when starting. Even the workshop is speechless. Has anyone ever had such a thing? Or does it know what it might be about????