Power loss and hissing noise when revving

[XIBRAX]

hiya people, I have a mercedes c220 cdi 51 reg, and recently I am getting a power loss when accelerating I get a really bad hissing noise it sound like the heating is on full pelt but no air is coming from the vents! when I got a previous problem fixed from a mechanic, I was told that the intercooler pipe will need replacing soon which is why its making a hissing noise, could this problem be cause of the pipe? many thanx Ibrar

 

[djb]

briefly yes, split charge air pipes do just that, windy noise & no go!

 

[5pares]

Yeh get the pipe replaced itl self cure so no need for diag checks if it is a split pipe,its prop the top one going into the manifold.