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Hissing noise

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by S23, Dec 4, 2012.

  1. S23
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    S23 Member

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    Started up and but on the front window demister after the wi Dow cleared I drove up the hill and a loud hissing was coming from the glovebox area
    anyone else had this ?

    Also whenever I turn the car off is makes a hissing from outside under the bonnet ?
    Is this just any pressure in the turbo being relesed ?
    Thanks
    #1
  2. swarcup
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    swarcup Well-Known Member

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    the outside hissing is the aircon system and is normal, they all do it. The inside maybe a pipe that has come adrift, take the glovebox off and have a look.
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