Hissing noise

[MoodieJames]

Hi there, my mercedes e320 cdi avantgarde 2005 is making a hissing noise under acceleration and Im sure its not coming from the engine. It doesn't make the noise when sitting in park and revving. There doesn't seem to be any issues while driving and no black smoke ect.... Anybody any ideas thanks

 

[Blobcat]

Hello and welcome

I’ve moved it into the technical section for you. You don’t have a snake under the bonnet I’m presuming...

 

[MoodieJames]

Hello and welcome

I’ve moved it into the technical section for you. You don’t have a snake under the bonnet I’m presuming...

Thanks and I'm pretty sure I don't lol

 

[LostKiwi]

Probably a split boost hose. Won't show revving in neutral.
Very common problem.

 

[MoodieJames]

Probably a split boost hose. Won't show revving in neutral.
Very common problem.

Thanks for your help

 

[ajlsl600]

Probably a split boost hose. Won't show revving in neutral.
Very common problem.

almost certainly boost related connection/fitting

 

[Cole@MBS]

Most common pipe to check is on the drivers side front next to the fan/rad, normally show signs of a oil leak!