2011 GL 450 high pitch noise inside cabin

Discussion in 'GL-Class' started by Gigipvr, May 17, 2017.

  1. Gigipvr

    Gigipvr New Member

    Good Morning all- Just recently purchased a beautiful 2011 GL 450, as I was driving on the highway yesterday a high pith noise can be heard in the cabin, almost like radio interference with another device. hard to describe. I turned air off, radio off, and nothing changed. After a few minutes it stopped, it has happened a few times and I cant figure out what it could be. suggestions? Thank yiou

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