Squeaky Brakes
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Senior Member
Joined: Mar 2021
Posts: 452
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2024 GLE, 2022 GLC , 2022 GLC
Squeaky Brakes
Brought my 2022 GLC in for it’s first service. I mentioned to the service manager that my brakes were squeaking in the morning when taking the car out of my garage. Checked brakes and said that the technician found nothing wrong and did not hear any noise. Asked him if I should make a video to validate the problem. He informed me that the brakes build up something on their surface, even if not driven just overnight. If that were the case, then everyone that leaves a car, just overnight, would have squeaky brakes. A MB, a recognized luxury brand, should not have this problem, BTW I had the same problem with my 2018 GLC. The service manager, who happens to be a really nice guy, said he will take the car out for a ride. He called me later that day and told me that he replaced the rear brake pads and rotors. He then said that he gets G Wagons in with the same complaints. Having this same issue, squeaky brakes, for so many years, you would think MB would have come up with a solution. Very, very disappointing. The service manager was just trying to make me happy, I’m fairly certain that he didn’t hear any squeaking during his test drive, however, he felt that he needed to do something about it. Like I said, a really nice guy, who I would certainly bring my business to in the future.
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,135
Likes: 223
From: Milton/Westport, MA USA
me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
I've been told many times over the nearly 50 years I've been driving: brake squeal is not, in and of itself, an indication of any malfunction. I also used ceramic brake pads for many years and there is a process well documented on several MBWorld forums for getting them settled in properly to avoid squeaks. It involves several long controlled stops from various speeds. There is also a lubricant that many use that (obviously) goes on the backside of the pads.
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Joined: Dec 2019
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Brought my 2022 GLC in for it’s first service. I mentioned to the service manager that my brakes were squeaking in the morning when taking the car out of my garage. Checked brakes and said that the technician found nothing wrong and did not hear any noise. Asked him if I should make a video to validate the problem. He informed me that the brakes build up something on their surface, even if not driven just overnight. If that were the case, then everyone that leaves a car, just overnight, would have squeaky brakes. A MB, a recognized luxury brand, should not have this problem, BTW I had the same problem with my 2018 GLC. The service manager, who happens to be a really nice guy, said he will take the car out for a ride. He called me later that day and told me that he replaced the rear brake pads and rotors. He then said that he gets G Wagons in with the same complaints. Having this same issue, squeaky brakes, for so many years, you would think MB would have come up with a solution. Very, very disappointing. The service manager was just trying to make me happy, I’m fairly certain that he didn’t hear any squeaking during his test drive, however, he felt that he needed to do something about it. Like I said, a really nice guy, who I would certainly bring my business to in the future.
Senior Member
Joined: Apr 2007
Posts: 311
Likes: 74
From: Richmond, Virginia USA
'12 E550, '10 ML350, '06 E350, '20 GLC300, '21 GLC300
Pull the pads. Put some brake pad lube around the ears of every pad. While there, inspect the rotors and the pads. Put some lube where the piston hits the back of the pad. Be ready to replace pads. If more than 20,000 miles driven, I'd go ahead and replace since you've done all the work of pad replacement.
Junior Member
Joined: Apr 2016
Posts: 36
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2021 GLC 300 4Matic
Have a 2021 GLC300 4matic. Had the same problem. Dealer replaced pads and rotors on the front wheels. Squealing disappeared for a few months but was. back again. When I changed into summer tires, I noticed a couple of spots on both front rotors that looked like debris flattened/melted to the rotor. Not sure if these spots were causing the squealing. Couldn't scrape those spots away.
After installing the summer tires, I test drove the vehicle and on several safe occasions, I jammed on the brakes really hard, hoping to dislodge whatever those spots on the rotors are. Well, after this exercise, squealing is gone. If they ever come back, I will perform the brake jamming again and see if it really works. If not, there is still warranty on the vehicle and off to the dealer I will go.
Not scientific but seemed to work.
After installing the summer tires, I test drove the vehicle and on several safe occasions, I jammed on the brakes really hard, hoping to dislodge whatever those spots on the rotors are. Well, after this exercise, squealing is gone. If they ever come back, I will perform the brake jamming again and see if it really works. If not, there is still warranty on the vehicle and off to the dealer I will go.
Not scientific but seemed to work.
Thread Starter
Senior Member
Joined: Mar 2021
Posts: 452
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2024 GLE, 2022 GLC , 2022 GLC
Have a 2021 GLC300 4matic. Had the same problem. Dealer replaced pads and rotors on the front wheels. Squealing disappeared for a few months but was. back again. When I changed into summer tires, I noticed a couple of spots on both front rotors that looked like debris flattened/melted to the rotor. Not sure if these spots were causing the squealing. Couldn't scrape those spots away.
After installing the summer tires, I test drove the vehicle and on several safe occasions, I jammed on the brakes really hard, hoping to dislodge whatever those spots on the rotors are. Well, after this exercise, squealing is gone. If they ever come back, I will perform the brake jamming again and see if it really works. If not, there is still warranty on the vehicle and off to the dealer I will go.
Not scientific but seemed to work.
After installing the summer tires, I test drove the vehicle and on several safe occasions, I jammed on the brakes really hard, hoping to dislodge whatever those spots on the rotors are. Well, after this exercise, squealing is gone. If they ever come back, I will perform the brake jamming again and see if it really works. If not, there is still warranty on the vehicle and off to the dealer I will go.
Not scientific but seemed to work.
MBWorld God!
Joined: Dec 2019
Posts: 33,393
Likes: 6,624
Have a 2021 GLC300 4matic. Had the same problem. Dealer replaced pads and rotors on the front wheels. Squealing disappeared for a few months but was. back again. When I changed into summer tires, I noticed a couple of spots on both front rotors that looked like debris flattened/melted to the rotor. Not sure if these spots were causing the squealing. Couldn't scrape those spots away.
After installing the summer tires, I test drove the vehicle and on several safe occasions, I jammed on the brakes really hard, hoping to dislodge whatever those spots on the rotors are. Well, after this exercise, squealing is gone. If they ever come back, I will perform the brake jamming again and see if it really works. If not, there is still warranty on the vehicle and off to the dealer I will go.
Not scientific but seemed to work.
After installing the summer tires, I test drove the vehicle and on several safe occasions, I jammed on the brakes really hard, hoping to dislodge whatever those spots on the rotors are. Well, after this exercise, squealing is gone. If they ever come back, I will perform the brake jamming again and see if it really works. If not, there is still warranty on the vehicle and off to the dealer I will go.
Not scientific but seemed to work.
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MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,135
Likes: 223
From: Milton/Westport, MA USA
me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
I test drove the vehicle and on several safe occasions, I jammed on the brakes really hard, hoping to dislodge whatever those spots on the rotors are. Well, after this exercise, squealing is gone. If they ever come back, I will perform the brake jamming again and see if it really works. If not, there is still warranty on the vehicle and off to the dealer I will go.
Not scientific but seemed to work.
Not scientific but seemed to work.
HOW TO BED BRAKES
1. PICK YOUR SPOT
Find an open stretch of road that will allow you to safely stop your vehicle multiple times.2. SPEED UP, THEN SLOW DOWN
Accelerate to 35 MPH and apply moderate brake pressure to reduce your speed to under 5 MPH.3. REPEAT AS NECESSARY
Repeat this process 2-3 times, accelerating back to 35 MPH and moderately braking.4. TEST AGAIN AT 55 MPH
Next, increase speed to 50 MPH and strongly brake down to 5 MPH. You don’t want to brake strong enough to activate your ABS or lock up the tires. You should be able to come down to 5 MPH within a few seconds.5. REPEAT AS NECESSARY
Repeat this process 4-5 times, then drive an additional 1-2 miles while very lightly braking to cool down the brakes.6. PRO TIP:
It’s important to avoid coming to a complete stop during the hard-braking stage as it’s possible to melt brake pads against hot rotors. Of course, should a deer, pedestrian, or Sasquatch run onto the road, feel free to mash the brake pedal. Safety first!https://www.youtube.com/watch?v=3fEJ...ature=youtu.be
MBWorld God!
Joined: Dec 2019
Posts: 33,393
Likes: 6,624
HERE's the scientific method:
https://www.youtube.com/watch?v=3fEJ...ature=youtu.be
HOW TO BED BRAKES
1. PICK YOUR SPOT
Find an open stretch of road that will allow you to safely stop your vehicle multiple times.2. SPEED UP, THEN SLOW DOWN
Accelerate to 35 MPH and apply moderate brake pressure to reduce your speed to under 5 MPH.3. REPEAT AS NECESSARY
Repeat this process 2-3 times, accelerating back to 35 MPH and moderately braking.4. TEST AGAIN AT 55 MPH
Next, increase speed to 50 MPH and strongly brake down to 5 MPH. You don’t want to brake strong enough to activate your ABS or lock up the tires. You should be able to come down to 5 MPH within a few seconds.5. REPEAT AS NECESSARY
Repeat this process 4-5 times, then drive an additional 1-2 miles while very lightly braking to cool down the brakes.6. PRO TIP:
It’s important to avoid coming to a complete stop during the hard-braking stage as it’s possible to melt brake pads against hot rotors. Of course, should a deer, pedestrian, or Sasquatch run onto the road, feel free to mash the brake pedal. Safety first!https://www.youtube.com/watch?v=3fEJ...ature=youtu.be
Newbie
Joined: Feb 2024
Posts: 1
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GLC 300
Squeaing brakes being bedded
I too have/had the squealing problem with a GLC 300, mostly when reversing. Went through the suggested bedding process and have gone a week now without hearing any noise when reversing. After 3 years of embarassing noise!
Banned
Joined: Nov 2022
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GLC 250d
My MB dealer tried to fix the squealing brakes (especially when reversing out of my garage in the morning) but they failed. I have now fitted performance brake pads, and so far so good (700km so early days). I wasn't going to fit Mercedes OE brakes if Mercedes themselves couldn't fix it.
MBWorld God!
Joined: Dec 2019
Posts: 33,393
Likes: 6,624
Usually light braking will bring back the noise, cold pads are abrasive which will remove any pad material on the rotors.
