HUMMM noise when accelerating

[s5aif]

Hi,

I have a 2004 c180k, Whenever i slightly accelerate i get a very loud humming noise which feels very weird to the ears. I have no idea what the problem could be or is it supposed to be like that.

 

[television]

Could it be a car built befor 09-03 and have the Valeo problem

 

[s5aif]

build date was late 2004.

 

[television]

OK relax on that one, any chance of a better description, what speed,viabration etc