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Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3661
Experience:  15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.
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My 2008 s550 4matic drives great except metallic humming/rubbi

Customer Question

My 2008 s550 4matic drives great except for the metallic humming/rubbing sound. The sound gets louder as I accelerate, I have no problems braking or turning. The sound is not present when reversing.
Submitted: 6 months ago.
Category: Mercedes
Expert:  FIXITMAN replied 6 months ago.
Hello, my name is***** you for the question. There are some common issues with a hub bearing failing, but most of the time this noise comes from a failing front axle or an issue with the differential. If there is a differential bearing failure then this will occur. These need to be checked, typically by draining the fluid and checking it for metal. I hope this helps. Please let me know if you need more help.
Expert:  Lou P. master tech replied 6 months ago.
Hello, can you provide me with the vin number? if you have the abc suspension there is a common issue with the pulsation dampener on the abc tandem pump. you may hear and feel the noise at your left foot on the floor. ??
Expert:  Lou P. master tech replied 6 months ago.
also how many miles are on the car?
Expert:  Lou P. master tech replied 6 months ago.
hello are you still needing assistance?