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Hissing noise from brake pedal when released - Mercedes GLC 300 AMG premium plus (2020 Model)

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16K views 15 replies 9 participants last post by  mrrosado  
Hi guys my 2020 GLC coupe is also making the same noise - hissing/ air kind of sound when depressing the brakes. I’ve taken it to 2 garages and they can’t find any faults although I know that this sound is not normal! Did anyone find a solution?