hissing or buzzing

  1. karozza

    SL55 AMG Hissing/Buzzing noises?!?

    When I switch the car off & get out, I can hear a hissing noise coming from behind the passenger side front wheel. It sounds like air leaking from a tyre but it isn't the tyre & it stops after a while. I also have a buzzing noise coming from the driver's side engine bay (I think) when I open...
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