W166 Vibration While Braking (No Steering Vibration)
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Junior Member
Joined: Feb 2019
Posts: 37
Likes: 9
From: New Jersey
C207 E550
W166 Vibration While Braking (No Steering Vibration)
Hi,
I need help with diagnosing a vibration problem with my 2014 ML63.
Car has 57K miles as of today and is in overall mint shape.
I recently noticed a vibration of the whole car while braking at over 50MPH.
The harder you brake, the more violent the vibration becomes.
Since the steering was not vibrating at all, I decided maybe the rear rotors might be warped.
Last week I ordered Zimmerman rotors and EBC red stuff pads from FCP euro and replaced the rear brakes.
The old brake pads looked in pretty good shape while the rotors were pretty rusted.
Took it for a test drive at local roads and everything looked fine after the brake job.
Yesterday, I take it for a high speed drive on the highway and the whole vibration is back and unchanged from before replacing the rear brakes.
Vibration is pretty violent when braking from speeds over 70+ MPH. (Still no vibration from the steering wheel but the whole car vibrates)
The harder you brake, the more violent the vibration is...
Should I go ahead and replace the front brakes too?
Pads look almost at 80% on the front but the rotors seem to have some rust on them.
I have been looking up this info online and there are many theories, including bad tires, bad front ball joints, bad front struts or even maybe bad drive shaft (Universal link and/or Flex disk).
There was also a suggestion that bad motor mounts & transmission mounts can cause this, however there is absolutely no vibration when accelerating, even when I floor it from 0 to 80.
If there is any one of you who experienced the same problem, please help diagnose and propose a repair.
I just don't want to start throwing unnecessary parts.
I also plan on ordering a Dial-meter from Amazon to try and figure out if the front rotors are true.
Thank you.
I need help with diagnosing a vibration problem with my 2014 ML63.
Car has 57K miles as of today and is in overall mint shape.
I recently noticed a vibration of the whole car while braking at over 50MPH.
The harder you brake, the more violent the vibration becomes.
Since the steering was not vibrating at all, I decided maybe the rear rotors might be warped.
Last week I ordered Zimmerman rotors and EBC red stuff pads from FCP euro and replaced the rear brakes.
The old brake pads looked in pretty good shape while the rotors were pretty rusted.
Took it for a test drive at local roads and everything looked fine after the brake job.
Yesterday, I take it for a high speed drive on the highway and the whole vibration is back and unchanged from before replacing the rear brakes.
Vibration is pretty violent when braking from speeds over 70+ MPH. (Still no vibration from the steering wheel but the whole car vibrates)
The harder you brake, the more violent the vibration is...
Should I go ahead and replace the front brakes too?
Pads look almost at 80% on the front but the rotors seem to have some rust on them.
I have been looking up this info online and there are many theories, including bad tires, bad front ball joints, bad front struts or even maybe bad drive shaft (Universal link and/or Flex disk).
There was also a suggestion that bad motor mounts & transmission mounts can cause this, however there is absolutely no vibration when accelerating, even when I floor it from 0 to 80.
If there is any one of you who experienced the same problem, please help diagnose and propose a repair.
I just don't want to start throwing unnecessary parts.
I also plan on ordering a Dial-meter from Amazon to try and figure out if the front rotors are true.
Thank you.
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Joined: Oct 2009
Posts: 7,011
Likes: 2,198
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
Before spending more money, I would research and do a very thorough job of bedding in your brakes.
It'll take 20 to 30 minutes, and a long stretch of open road where you can speed up and slow to a near stop, without affecting traffic.
The odds of this fixing your problem are low, but they're not zero.
Uneven bedding can cause grabbing at each rotation of the wheel, similar to a warped rotor.
It'll take 20 to 30 minutes, and a long stretch of open road where you can speed up and slow to a near stop, without affecting traffic.
The odds of this fixing your problem are low, but they're not zero.
Uneven bedding can cause grabbing at each rotation of the wheel, similar to a warped rotor.
