Is this normal?
#1
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There is a hissing sound coming near the rear tires. It's on both sides. The hissing sound cuts in and out. Anyone else have this problem with their 05 C230k.
#3
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2004 C320
Did you change your wheels? I have noticed that many non-stock wheels using new bolts seem to either 1) Have the bolt be too long and you'd hear a clicking sound or 2) The bolt is just BARELY too long and you will hear a whish whish sound that comes and goes.
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#4
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2001 C320
Originally Posted by goldenbuddha
Did you change your wheels? I have noticed that many non-stock wheels using new bolts seem to either 1) Have the bolt be too long and you'd hear a clicking sound or 2) The bolt is just BARELY too long and you will hear a whish whish sound that comes and goes. ![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
Thanks,
Bill
#5
It's not so much of a clicking sound. It's more like a leak kind of noise. Sounds like its releasing some pressure or something. I'll take it to the dealer anyways and see what they say.
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2003 C230K Sport Coupe, 1986 190E 2.3
It is the fuel pump! Even my 1986 does that, you hear the fuel pump which on the W201 was under the drivers side rear passenger seat. Not sure where it is on the W203 as I have never looked for it. Also not sure if the W203 has dual pumps or a single unit either. But the sound is probably a mixture of exhaust flow sound and fuel pump! The exhaust will drown out the fuel pump sound once in a while so you do not hear it constantly.
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'06 ML500 w/Apperance pkg & '07 SL550 w/AMG pkg
Yes, the hissing sound is from the electric fuel pump. It is located in the rear of the car, right around the rear wheels. This is a common noise and explains why you only hear it when the car is turned on!!
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#9
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W203 C240
fuel pump aye? that explains it. I thought it was a nail in my tire at first then i incorrectly assumed it was the exhaust since its the drivers rear tire side.
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