Hissing noise

MoodieJames

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E320 advantage 2005
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

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R171 SLK280, Smart R451, Land Rover 110 County SW, 997 C2S, R1250 GSA TE 40th, CBR600FP
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...
 
OP
M

MoodieJames

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E320 advantage 2005
  • Thread Starter
  • Thread starter
  • #3
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

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Your Mercedes
'93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
Probably a split boost hose. Won't show revving in neutral.
Very common problem.
 

ajlsl600

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Your Mercedes
clk3202001,sl6002003 with everything regrettably sold ,A class 170cdi auto. NG/TF1800 ML250
Probably a split boost hose. Won't show revving in neutral.
Very common problem.

almost certainly boost related connection/fitting
 

Cole@MBS

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Your Mercedes
124 300 CE 24 Coupe, C220CDI, Porsche 911 4s, Dolomite sprint,
Most common pipe to check is on the drivers side front next to the fan/rad, normally show signs of a oil leak!
 

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