Humming sound help
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c300
Humming sound help
Hey what's up guys I'm new here. I need some help My '11 c300 makes a humming noise mostly in the back as it gains speed it starts around 12mph and it somewhat goes away around 23-35mph but after that it sounds louder and faster . I jacked up the car and put it on drive accelerated but I heard no noise at all I checked the tires to see if there any play and nothing. I checked my tired and the front ones are going bald on the inner side if that makes sense thanks a my