 I bought a new GLC 300 2017, but there was the buzzing noise in break, park, and hold. This is not only irritating, but occurred problems in my ear. After I drove my car for a week, I had a serious problem with my ear in my daily life. Although I am not in the car, I hear the buzzing noise and my ear is hearting. I have a serious headache. The dealership tested and found that most other GLC 300 also has this buzzing noise. Particularly my car had a louder buzzing noise. I contacted the Mercedes USA and told them to recall GLC 300, but they ignored. Because I already paid and bought the car, they didn't care. DO NOT buy this default car!