W212 Squeal/squeak/chirp type noise at slow speed. Video link attached
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Member
Joined: Sep 2023
Posts: 130
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Mercedes E250 W212 Diesel- OM651
W212 Squeal/squeak/chirp type noise at slow speed. Video link attached
My W212 is causing this squeal/squeak noise ONLY when at SLOW speeds and it disappears if I touch the brake the slightest. Brake pads are completely fine and have life. What could be the issue.
In the end of the video I pressed the brake slightly and the noise disappeared.
Thankyou
Last edited by Spruze; Nov 2, 2024 at 08:39 AM.
Out Of Control!!
Joined: Apr 2019
Posts: 11,922
Likes: 6,775
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Noisy wheel brakes
95% chance it's brake pads contacting brake rotors in not an entirely proper way.
> Take a PICTURE of the rotors...
Ritors need to be smooth, not grooved
> Check how big is wheel bearings freeplay!
Loose bearings allow rotors to wobble
> How long ago since pads installed?
Pads need 500Mi to become true with disks surface
> Silicone lubricated slide pins ?
Calipers need to easily self-center over rotors.
> Who works on this car??
Someone needs to be in charge of maintenance.
> Take a PICTURE of the rotors...
Ritors need to be smooth, not grooved
> Check how big is wheel bearings freeplay!
Loose bearings allow rotors to wobble
> How long ago since pads installed?
Pads need 500Mi to become true with disks surface
> Silicone lubricated slide pins ?
Calipers need to easily self-center over rotors.
> Who works on this car??
Someone needs to be in charge of maintenance.
Last edited by CaliBenzDriver; Nov 2, 2024 at 04:18 PM.
Thread Starter
Member
Joined: Sep 2023
Posts: 130
Likes: 5
Mercedes E250 W212 Diesel- OM651
95% chance it's brake pads contacting brake rotors in not an entirely proper way.
> Take a PICTURE of the rotors...
Ritors need to be smooth, not grooved
> Check how big is wheel bearings freeplay!
Loose bearings allow rotors to wobble
> How long ago since pads installed?
Pads need 500Mi to become true with disks surface
> Silicone lubricated slide pins ?
Calipers need to easily self-center over rotors.
> Who works on this car??
Someone needs to be in charge of maintenance.
> Take a PICTURE of the rotors...
Ritors need to be smooth, not grooved
> Check how big is wheel bearings freeplay!
Loose bearings allow rotors to wobble
> How long ago since pads installed?
Pads need 500Mi to become true with disks surface
> Silicone lubricated slide pins ?
Calipers need to easily self-center over rotors.
> Who works on this car??
Someone needs to be in charge of maintenance.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
https://youtube.com/shorts/2X3quedyI...kOsSW5aFyVG6AP
My W212 is causing this squeal/squeak noise ONLY when at SLOW speeds and it disappears if I touch the brake the slightest. Brake pads are completely fine and have life. What could be the issue.
In the end of the video I pressed the brake slightly and the noise disappeared.
Thankyou
My W212 is causing this squeal/squeak noise ONLY when at SLOW speeds and it disappears if I touch the brake the slightest. Brake pads are completely fine and have life. What could be the issue.
In the end of the video I pressed the brake slightly and the noise disappeared.
Thankyou
If so, my family member's C238 E 450 coupe has it too, I understand yours is a W212 but it was the carriers or something, more info in the thread.
Out Of Control!!
Joined: Apr 2019
Posts: 11,922
Likes: 6,775
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
FLOATING FRT CALIPERS....
Simpler version:
Install new genuine rotors + genuine pads to solve your noise issue.
Last edited by CaliBenzDriver; Nov 4, 2024 at 01:10 PM.
Thread Starter
Member
Joined: Sep 2023
Posts: 130
Likes: 5
Mercedes E250 W212 Diesel- OM651
Sounds like this? https://mbworld.org/forums/w213-amg/...cabriolet.html
If so, my family member's C238 E 450 coupe has it too, I understand yours is a W212 but it was the carriers or something, more info in the thread.
If so, my family member's C238 E 450 coupe has it too, I understand yours is a W212 but it was the carriers or something, more info in the thread.
Newbie
Joined: Feb 2025
Posts: 10
Likes: 2
From: In Europe
W212 W221 and R172
Sounds like a classic case of brake pad vibration or glazing to me, even though your pads still have life left. Since the squeak disappears the moment you touch the brake, it’s likely one of these:
- Brake Pad Wear Indicators – Some pads have wear indicators that can cause slight squeaking at low speeds before they hit full wear. Even if they look fine, check if the indicators are making contact.
- Glazed Brake Pads or Rotors – If the pads or rotors have developed a smooth, hardened surface from heat, they can cause a high-pitched squeal at slow speeds. A light sanding or resurfacing might help.
- Lack of Lubrication on Contact Points – The brake pad backing plates and caliper slides should have a thin layer of brake grease (not on the pad surface, of course). If they’re dry, the pads can vibrate and cause noise.
- Loose or Worn Anti-Rattle Clips/Shims – If the pad clips or shims are loose, missing, or worn, the pads might be vibrating slightly when not under braking pressure.
- Dust or Debris Build-up – Sometimes, brake dust or small debris gets trapped and causes squeaking. Blasting the brakes with compressed air or brake cleaner might help.
