2024 GLS450 Brakes Replaced After 3,000 Miles
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Joined: Jun 2023
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From: Saint Louis, MO
2024 GLS450
2024 GLS450 Brakes Replaced After 3,000 Miles
My brakes were squealing loudly every time I stopped, so I brought it to the dealer and they replaced the front brake rotors and pads under warranty. They said the rotors had hot spots and the pads were discolored. The possibilities I can image causing this:
- Unlubricated brake hardware from the factory could cause the brakes to drag
- Air in the brake line from the factory could cause the brakes to drag
- The adaptive cruise control drags the brakes on the downhill of every highway rather than downshifting, and I use cruise control all the time. Here's a video of it dragging the brakes down an 8% grade in the Appalachians:
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2012 E Cabrio, 2015 GL , 2017 B ED & 2024 GLS
My brakes were squealing loudly every time I stopped, so I brought it to the dealer and they replaced the front brake rotors and pads under warranty. They said the rotors had hot spots and the pads were discolored. The possibilities I can image causing this:
- Unlubricated brake hardware from the factory could cause the brakes to drag
- Air in the brake line from the factory could cause the brakes to drag
- The adaptive cruise control drags the brakes on the downhill of every highway rather than downshifting, and I use cruise control all the time. Here's a video of it dragging the brakes down an 8% grade in the Appalachians: https://youtu.be/k4gZoz4t3UU?si=K-qwGpt82Mnahyt4
That said, by that point we had already had about 10k miles on the brakes, so 3000 sounds very low. No squealing here and I've been in the Blue Ridge Mountains for about 1000 miles over the last 8 weeks.
Glad they didn't argue with you over replacing them.
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2020 GLS450 (wife) / 2024 Ford Bronco (mine) / 2014 VW Tiquan (son)
That really doesn’t sound right at all, makes me think dragging caliper if just one, faulty system if all around. We’re 65k with plenty of meat left on the pads. Tons of stop/go usage too, and lots of cruise control in hilly areas. How’s your gas mileage reading? You’d have to basically have the brakes applied for the entire 3000 miles to wear them down that fast, regardless if using cruise control or not..
Given how insanely computer controlled everything is on these cars, perhaps a setting for the master cylinder is off?
Given how insanely computer controlled everything is on these cars, perhaps a setting for the master cylinder is off?
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From: Maryland
2024 S580
Sounds to me like the dealer didn’t say the brakes were worn, they were just able to substantiate a case to MBUSA to replace them because of your squealing. No way the brakes were worn down in 3,000 miles.
With that said, I come off of adaptive cruise when going down a steep grade so I can use engine braking. Like you said the car will just drag the brakes. Adaptive cruise isn’t appropriate for every scenario.
With that said, I come off of adaptive cruise when going down a steep grade so I can use engine braking. Like you said the car will just drag the brakes. Adaptive cruise isn’t appropriate for every scenario.
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Joined: Jun 2023
Posts: 93
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From: Saint Louis, MO
2024 GLS450
The dealer didn’t say the pads were worn out, they said they were overheated. I never got a dashboard notification for the brakes, I just had loud screeching at every stop.
The paperwork said they replaced two bolts in the calipers. I don’t know if that’s their standard procedure for a brake job.
The paperwork said they replaced two bolts in the calipers. I don’t know if that’s their standard procedure for a brake job.
Last edited by Missourian; Jan 8, 2024 at 10:06 AM.
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
Effing pads, if they're aggressive, might exacerbate the problem.
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From: Maryland
2024 S580
On my S Class I'm just running ordinary ceramic pads that my mechanic sourced, brake dust is almost entirely eliminated with no reduction in stopping power
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EQS
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2024 S580
I don't unfortunately, he said that it was a small manufacturer he gets pads from and they don't sell directly to consumers. I know a lot of people on the S Class forum though use PowerStop Z23 pads and are very happy with them
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From: MA
MY2024 GLE 450
I don't have a GLS but on my GLE, it will use brakes at low power (<10%) at times when coasting downhill with no Cruise Control activated. I think it's normal, it's a sophisticated system that appears to prefer using brakes and not the engine.
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2013 E350 / 2017 E300 / 2019 GLS450
I think they told you what was wrong; in the report, they replaced two bolts, I think your brakes may not have had the bolts to start with, which caused the brakes to drag, wearing them down much quicker than normal. I changed my front brake pads at 120,420 miles on my 2019 GLS450. That's the first change of the front pads, I changed the rear pads about a year ago.
