Hello I am Michael, I drive a slightly older Renault Megane Scenic year 2004, now in the cold season, or if the vehicle is standing a bit violently at the first start. So, either it is cold under +5 degrees, often also occurs in the garage or the vehicle stands longer than a day. In warmer temperatures the problem does not occur. Press the start button, engine starts with loud flap and goes out again after 2 – 5 seconds. Sometimes it happens, but less often it starts and after 2 – 3 seconds it goes away and it runs normal. What can this be and how can I fix the problem? My brother said it might be due to the hydro-pumps, but I don’t know if my engine has which. The funny thing is that it doesn’t occur all the time, but in cool weather often. Can anyone please help me and tell me if there are any bigger problems with it? With friendly and quiet. Greetings Michael