Brakes squealing
Junior Member
Joined: Mar 2020
Posts: 32
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2020 C63s Coupe
Wait, we could get it replaced under warranty? I honestly was under the impression this is a normal occurrence and it's just something c63/c63s owners have to live with.Please let me know because I definitely would love to have mine replaced under warranty in 2 month when service A comes up. Thanks!
Out Of Control!!
Joined: Nov 2018
Posts: 11,468
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From: San Francisco Bay Area
2019 C63CS
Brakes usually have a limited warranty on them in case of defects from the factory. Not sure for how long AMG warranties the brakes, but it's typically a few thousand miles. Generally though, squealing brakes is a result of not properly bedding the brakes and/or not regularly getting heat into them. You need to build up a layer of pad material on your rotors. This will not only improve stopping power and overall braking performance, but also eliminate squealing and vibrations due to uneven deposits. Go out for some repetitive hard braking until you can smell the brakes. Do about 8-10 60 to 5 stops, and then drive around for a while w/o using the brakes to cool them down. Don't stand on the brakes at a stop while they are hot as that will imprint the pads.
Junior Member
Joined: Mar 2020
Posts: 32
Likes: 6
2020 C63s Coupe
Brakes usually have a limited warranty on them in case of defects from the factory. Not sure for how long AMG warranties the brakes, but it's typically a few thousand miles. Generally though, squealing brakes is a result of not properly bedding the brakes and/or not regularly getting heat into them. You need to build up a layer of pad material on your rotors. This will not only improve stopping power and overall braking performance, but also eliminate squealing and vibrations due to uneven deposits. Go out for some repetitive hard braking until you can smell the brakes. Do about 8-10 60 to 5 stops, and then drive around for a while w/o using the brakes to cool them down. Don't stand on the brakes at a stop while they are hot as that will imprint the pads.
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⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
They will squeal mate. Some are lucky and won't do it but I've gone through 3 sets of genuines and all bedded in correctly and they squeal on light application when they are hot.
On the first set it drove me nuts so I took them off, rubbed them down with 230 grit sandpaper, applied copper grease to the back of the pads and it fixed the squealing for 1 whole week. Came back again after.
Even tried the old reverse fast and slam on the brakes trick but that did sh*t all.
2 more sets later and brand new pads and rotors squealing again. Oh well.
On the first set it drove me nuts so I took them off, rubbed them down with 230 grit sandpaper, applied copper grease to the back of the pads and it fixed the squealing for 1 whole week. Came back again after.
Even tried the old reverse fast and slam on the brakes trick but that did sh*t all.
2 more sets later and brand new pads and rotors squealing again. Oh well.
Last edited by Jimmy_c63s; Dec 4, 2020 at 05:01 AM.
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Mine squeal loudly at low speed braking, everything I read here is that it's unavoidable with stock pads.
Best option is to change to aftermarket pads, I've ordered Portfields, but there are other recommended options if you do a search.
Best option is to change to aftermarket pads, I've ordered Portfields, but there are other recommended options if you do a search.
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Out Of Control!!
Joined: Nov 2018
Posts: 11,468
Likes: 5,356
From: San Francisco Bay Area
2019 C63CS
Just to add to what I said above about bedding etc. My brakes generally don't squeal during normal driving. I occasionally have a faint squeal from the rear under very light braking when the brakes are cold. I just replaced my worn rear pads actually and that behavior hasn't changed. I think it's also potentially from the dust and dirt on the rotors, because it seems to not happen for a while after a fresh wash. Nothing anywhere annoying, though, and I haven't been out yet to give the new rear pads a proper run in. The only times they get noisy is after a canyon stint when they are really hot and I brake lightly, but the noise goes away once they cool down.
One of the things about brakes that folks may not be aware of, is that they operate in two distinct modes. When they are cold, they operate in abrasive mode, essentially scraping against the rotor. This can cause noise, but also it slowly removes any pad material layer that you may have previously laid down during a bedding and eventually they are scrapping against bare metal again. When they are hot, that's when pad material transfers to the rotor and friction starts to happen between the pads and the pad material on the rotors. This is what you want, because the friction is the best between the same material. Pad material to pad material instead of pad material to metal. It means that if you primarly do daily driving, your brakes largely operate in abrasive mode and any bedding you may have done will eventually be ineffective. You really need to excersise the brakes periodically and get them hot occasionally to maintain the pad material layer, or you will sooner or later suffer from noisy brakes.
BTW, this is an excellent video on the subject:
One of the things about brakes that folks may not be aware of, is that they operate in two distinct modes. When they are cold, they operate in abrasive mode, essentially scraping against the rotor. This can cause noise, but also it slowly removes any pad material layer that you may have previously laid down during a bedding and eventually they are scrapping against bare metal again. When they are hot, that's when pad material transfers to the rotor and friction starts to happen between the pads and the pad material on the rotors. This is what you want, because the friction is the best between the same material. Pad material to pad material instead of pad material to metal. It means that if you primarly do daily driving, your brakes largely operate in abrasive mode and any bedding you may have done will eventually be ineffective. You really need to excersise the brakes periodically and get them hot occasionally to maintain the pad material layer, or you will sooner or later suffer from noisy brakes.
BTW, this is an excellent video on the subject:
Last edited by superswiss; Dec 4, 2020 at 10:50 AM.
Super Member
Joined: Jun 2014
Posts: 518
Likes: 71
From: Los Angeles, CA
2019 S63 AMG (Current), 2015 E63S, 2008 E63, 2005 E55
Just to add to what I said above about bedding etc. My brakes generally don't squeal during normal driving. I occasionally have a faint squeal from the rear under very light braking when the brakes are cold. I just replaced my worn rear pads actually and that behavior hasn't changed. I think it's also potentially from the dust and dirt on the rotors, because it seems to not happen for a while after a fresh wash. Nothing anywhere annoying, though, and I haven't been out yet to give the new rear pads a proper run in. The only times they get noisy is after a canyon stint when they are really hot and I brake lightly, but the noise goes away once they cool down.
One of the things about brakes that folks may not be aware of, is that they operate in two distinct modes. When they are cold, they operate in abrasive mode, essentially scraping against the rotor. This can cause noise, but also it slowly removes any pad material layer that you may have previously laid down during a bedding and eventually they are scrapping against bare metal again. When they are hot, that's when pad material transfers to the rotor and friction starts to happen between the pads and the pad material on the rotors. This is what you want, because the friction is the best between the same material. Pad material to pad material instead of pad material to metal. It means that if you primarly do daily driving, your brakes largely operate in abrasive mode and any bedding you may have done will eventually be ineffective. You really need to excersise the brakes periodically and get them hot occasionally to maintain the pad material layer, or you will sooner or later suffer from noisy brakes.
BTW, this is an excellent video on the subject:
https://youtu.be/pdPX6rzuINc
One of the things about brakes that folks may not be aware of, is that they operate in two distinct modes. When they are cold, they operate in abrasive mode, essentially scraping against the rotor. This can cause noise, but also it slowly removes any pad material layer that you may have previously laid down during a bedding and eventually they are scrapping against bare metal again. When they are hot, that's when pad material transfers to the rotor and friction starts to happen between the pads and the pad material on the rotors. This is what you want, because the friction is the best between the same material. Pad material to pad material instead of pad material to metal. It means that if you primarly do daily driving, your brakes largely operate in abrasive mode and any bedding you may have done will eventually be ineffective. You really need to excersise the brakes periodically and get them hot occasionally to maintain the pad material layer, or you will sooner or later suffer from noisy brakes.
BTW, this is an excellent video on the subject:
https://youtu.be/pdPX6rzuINc
Out Of Control!!
Joined: Nov 2018
Posts: 11,468
Likes: 5,356
From: San Francisco Bay Area
2019 C63CS
As for the faint noise I was talking about, that actually turned out not to be brake related at all. It was the damper modules of the rear shocks that made the noise. It took me a while to get the dealership to diagnose it properly, but they eventually replaced my rear shocks under warranty and that noise is now completely gone. I initially thought it was a high pitch squealing noise caused by the brakes, but it was actually a high pitch electronic noise caused by the damper modules.
I just recently had a full brake job done as both front and rear brakes were worn again. I'm on my third set of rotors and pads in the front, second set of rotors and third set of pads in the rear. FWIW, roughly 32k miles at the moment. AMGs eat brakes for breakfast if you drive it like its meant to be driven.
Super Member
Joined: Jun 2014
Posts: 518
Likes: 71
From: Los Angeles, CA
2019 S63 AMG (Current), 2015 E63S, 2008 E63, 2005 E55
Yeah, I know. I responded to your thread. So, just to clarify. Any noise I may have after a canyon run is simply from having worked the brakes hard and them being hot. It goes away quickly, and actually hasn't happened much since this post. In the meantime I also wore out the original rear rotors, so I have new rotors and I'm on my third set of rear pads.
As for the faint noise I was talking about, that actually turned out not to be brake related at all. It was the damper modules of the rear shocks that made the noise. It took me a while to get the dealership to diagnose it properly, but they eventually replaced my rear shocks under warranty and that noise is now completely gone. I initially thought it was a high pitch squealing noise caused by the brakes, but it was actually a high pitch electronic noise caused by the damper modules.
I just recently had a full brake job done as both front and rear brakes were worn again. I'm on my third set of rotors and pads in the front, second set of rotors and third set of pads in the rear. FWIW, roughly 32k miles at the moment. AMGs eat brakes for breakfast if you drive it like its meant to be driven.
As for the faint noise I was talking about, that actually turned out not to be brake related at all. It was the damper modules of the rear shocks that made the noise. It took me a while to get the dealership to diagnose it properly, but they eventually replaced my rear shocks under warranty and that noise is now completely gone. I initially thought it was a high pitch squealing noise caused by the brakes, but it was actually a high pitch electronic noise caused by the damper modules.
I just recently had a full brake job done as both front and rear brakes were worn again. I'm on my third set of rotors and pads in the front, second set of rotors and third set of pads in the rear. FWIW, roughly 32k miles at the moment. AMGs eat brakes for breakfast if you drive it like its meant to be driven.
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From: Seminole, Fl
2021 C63s
Super Member
Joined: Mar 2019
Posts: 600
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From: NYC area
2019 C63S Coupe
I have a high pitch squealing sound when the brakes are hot and only when backing up. It been going on for some time now. I been living with in for now.
This april had B Service completed (at MB Dealership)and one of the "Recommendation" was to replace the rear rotors and brakes that were measured at 4-5 mm. I decided to wait until the Check Brake light appears. Plus they wanted just over $2,000 to replace the rear rotors/brakes.
That "Recommendation" was 1,800 miles ago.
Wonder if that high pitch sound could be the rear shocks? I extended my MB warranty but leaving the car at the Dealeship is a real pain as they keep it forever to get a repair done.
Recently driving at approx. 40 miles an hour I had to make a panic stop as the car in front of me had come to a full stop. I was ready for the crash. Luckily my car was able to stop within a few feet of the other car rear end. My summer tires have I believe have about only 2,000 miles. This close call will help me monitor my tire condition more closely especially in wet conditions.
A MB site below (see last video) show stopping distance in wet conditions with different tire wear.
mbusatirecenter.com
This april had B Service completed (at MB Dealership)and one of the "Recommendation" was to replace the rear rotors and brakes that were measured at 4-5 mm. I decided to wait until the Check Brake light appears. Plus they wanted just over $2,000 to replace the rear rotors/brakes.
That "Recommendation" was 1,800 miles ago.
Wonder if that high pitch sound could be the rear shocks? I extended my MB warranty but leaving the car at the Dealeship is a real pain as they keep it forever to get a repair done.
Recently driving at approx. 40 miles an hour I had to make a panic stop as the car in front of me had come to a full stop. I was ready for the crash. Luckily my car was able to stop within a few feet of the other car rear end. My summer tires have I believe have about only 2,000 miles. This close call will help me monitor my tire condition more closely especially in wet conditions.
A MB site below (see last video) show stopping distance in wet conditions with different tire wear.
mbusatirecenter.com
Last edited by jj18; Jul 13, 2023 at 03:01 PM.
Out Of Control!!
Joined: Nov 2018
Posts: 11,468
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From: San Francisco Bay Area
2019 C63CS
FWIW, below is a link to the thread with a video of the high pitch noise coming from the dampers. Some call it kind of a sonar sound. It's not just when reversing. If the issue is present, then it's audible at very low speeds whenever there is movement in the suspension. With 4-5 mm there's still some live left on the pads, but as I said elsewhere the pads do start squealing as they are nearing their wear limit. That's usually my early warning that I will have to replace them soon.
https://mbworld.org/forums/c63-c63s-...se-mad-me.html
https://mbworld.org/forums/c63-c63s-...se-mad-me.html
Super Member
Joined: Jun 2014
Posts: 518
Likes: 71
From: Los Angeles, CA
2019 S63 AMG (Current), 2015 E63S, 2008 E63, 2005 E55
FWIW, below is a link to the thread with a video of the high pitch noise coming from the dampers. Some call it kind of a sonar sound. It's not just when reversing. If the issue is present, then it's audible at very low speeds whenever there is movement in the suspension. With 4-5 mm there's still some live left on the pads, but as I said elsewhere the pads do start squealing as they are nearing their wear limit. That's usually my early warning that I will have to replace them soon.
https://mbworld.org/forums/c63-c63s-...se-mad-me.html
https://mbworld.org/forums/c63-c63s-...se-mad-me.html
