vibration during braking
Thread Starter
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Joined: Jan 2002
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From: so cal
vibration during braking
hi all,
my car seems to be vibrating when i am braking. there is no vibration at speeds of 70-80, which would suggest bushing wear and tear. i have currently 72 k on it. thanks for the advice
my car seems to be vibrating when i am braking. there is no vibration at speeds of 70-80, which would suggest bushing wear and tear. i have currently 72 k on it. thanks for the advice
MBWorld Fanatic!
Joined: Mar 2002
Posts: 1,537
Likes: 2
From: Arizona, USA
W205 C300
rotors
Sounds like you have a warped rotor. The front rotors get thin and the heat from braking warps them. When they are warped they hit your brake pads unevenly as you are braking causing a vibration or shudder in the whole car. I replace mine with cross-drilled ones from Brembo.
Last edited by E-Klasse; Jun 5, 2003 at 02:27 PM.
Senior Member
Joined: Apr 2002
Posts: 405
Likes: 12
From: Sacramento, CA
W204 C300 2010
After replacing my front pads last month, I noticed a reduced amount of vibration after the job was completed.
When I did this job, I had the front rotors turned at PepBoys for $8.00 each. I replaced the pads with OEM Pagid brand.
When everything was apart, I noticed that the right front caliper must have been sticking because the inside pad was more worn than the outter.
I sanded all of the caliper contact points with emery strips and made sure that I put a little anti-seize on these surfaces before reassembly.
Turning the rotors made a big difference, new rotors would do the same. Sticky caliper probably did not help the situation either.
Rob Lee
When I did this job, I had the front rotors turned at PepBoys for $8.00 each. I replaced the pads with OEM Pagid brand.
When everything was apart, I noticed that the right front caliper must have been sticking because the inside pad was more worn than the outter.
I sanded all of the caliper contact points with emery strips and made sure that I put a little anti-seize on these surfaces before reassembly.
Turning the rotors made a big difference, new rotors would do the same. Sticky caliper probably did not help the situation either.
Rob Lee
Thread Starter
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Joined: Jan 2002
Posts: 449
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From: so cal
thx guys for the advice,
i will talk to the mechanic this week and will keep u posted. also sad that i notice oil leak from the front gasket too........i guess that what happens when the car is 72k old
i will talk to the mechanic this week and will keep u posted. also sad that i notice oil leak from the front gasket too........i guess that what happens when the car is 72k old
Thread Starter
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Joined: Jan 2002
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From: so cal
just a follow up.
i had my car seen by the mechanic. at first he thought it was the bushings, but later after examining it was the warped rotor. he told to not change it yet since my brake pads have arond 4to 5 months left, then to change them both.
thx e-klasse for the heads up...saved me the anxiety.
i had my car seen by the mechanic. at first he thought it was the bushings, but later after examining it was the warped rotor. he told to not change it yet since my brake pads have arond 4to 5 months left, then to change them both.
thx e-klasse for the heads up...saved me the anxiety.
Thread Starter
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From: so cal
i was upset that my rotors were changed only two years ago. my present mechanic told me that the previous rotors were not genuine mercedes part so they wear out earlier.....................
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Senior Member
Joined: Apr 2002
Posts: 405
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From: Sacramento, CA
W204 C300 2010
In my previous response, I indicated that I had my front rotors machined when I replaced the pads. The vibration went away, but came back after about 500miles of driving.
I found a good, long, write up from Luke (Tirerack.com). The information was indepth and very useful. It indicated that brake vibrations can quickly come back after machining. But it also indicated that brake rotor runout was caused mainly by brake pad material being deposited onto the rotor. Well, to make a long story short, I got out my dial gauge and measured the runout. The worst side was .014".
For my rotors, after machining, they were still within the tolerated thickness, but on the thinner side of the scale. Given that stock rotors are soft, hence the grooved lip on the edges of the rotors. I think that after machining the rotors warped. causing a worst vibration than before the brake job.
I ended up getting a pair of Brembo replacement rotors from the Tirerack. Machining the stock rotors was not worth the effort, given that replacement rotors are in the $55-$70 each for stock type.
For 007, you should probably have yours changed soon, you will notice a big difference!
Regards,
Rob Lee
I found a good, long, write up from Luke (Tirerack.com). The information was indepth and very useful. It indicated that brake vibrations can quickly come back after machining. But it also indicated that brake rotor runout was caused mainly by brake pad material being deposited onto the rotor. Well, to make a long story short, I got out my dial gauge and measured the runout. The worst side was .014".
For my rotors, after machining, they were still within the tolerated thickness, but on the thinner side of the scale. Given that stock rotors are soft, hence the grooved lip on the edges of the rotors. I think that after machining the rotors warped. causing a worst vibration than before the brake job.
I ended up getting a pair of Brembo replacement rotors from the Tirerack. Machining the stock rotors was not worth the effort, given that replacement rotors are in the $55-$70 each for stock type.
For 007, you should probably have yours changed soon, you will notice a big difference!
Regards,
Rob Lee
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From: SFV, SoCal
2022 CLS450 AMG 4Matic
In addition to just waiting out your brake pads, I believe you will get some uneven tire wear as well when you're breaking from the vibration. I would also agree that you should change your rotors out ASAP.
