C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Humming sound help

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Old 08-17-2017, 07:04 PM
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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
Old 08-19-2017, 12:01 PM
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2008 C300 Sport
Could be cupping on the tires. I had this issue with my rears. New tires solved it.

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