Mercedes w204 c300 2011 Strange engine noise when cold and occasionally on bumps.
I have been having a problem with my c300 w204 4 matic 2011 making a strange and worrying noise when it is cold. I will attach a video of the noise and hope anyone has som information regarding this. It only occurs when the car is driving at low speed up to 15 mph and not when it is standing still. Once it does this noise once or twice it desaperes. If you dont drive the care or about 2 hours it will do it again. Removed the bellt in order to exclude the the pulleys and water and steering pump. So the noise is not comming from them.
Really hope somen can give me a clue what this can be.


