Brake Squealing Issue
Thread Starter
Newbie
Joined: Jun 2014
Posts: 2
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2017 GLE350 4MATIC
Brake Squealing Issue
I recently installed the a new set of brake pads and rotors for both front and rear. Initially they operate normally. However, after driving for approximately 20–30 minutes, the pads begin to produce a very loud and persistent squealing noise. Only when apply light brake.
Does anyone has similar experience before? what is the potential issue?
Thanks
Mercedes Brake Pad Set
TEX-2519201
Mercedes Brake Pad Set
TEX-2521502
Does anyone has similar experience before? what is the potential issue?
Thanks
Mercedes Brake Pad Set
TEX-2519201
Mercedes Brake Pad Set
TEX-2521502
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Joined: Sep 2025
Posts: 90
Likes: 39
From: UNITED STATES
Possible you got pads with a semi-metallic compound. They can squeal when hot, especially on Mercedes which often need specific shims or paste. Did you use the included anti-squeal shims and apply brake lubricant to the pad backing plates? If not, that's your likely cause.
Sometimes new rotors have a coating that needs to fully wear off. The squeal at light pressure is classic for vibration between pad and caliper. Remove, clean everything, lubricate all contact points (not the friction surface) with proper brake grease, and bed the pads in again with a few moderate stops. If it persists, the pad material itself might just be noisy.
Sometimes new rotors have a coating that needs to fully wear off. The squeal at light pressure is classic for vibration between pad and caliper. Remove, clean everything, lubricate all contact points (not the friction surface) with proper brake grease, and bed the pads in again with a few moderate stops. If it persists, the pad material itself might just be noisy.
Thread Starter
Newbie
Joined: Jun 2014
Posts: 2
Likes: 0
2017 GLE350 4MATIC
Hi Gazam, thanks for your replay.
I'm not sure the noise come from with corner yet, hard to tell.
I used the hardware shown in https://www.fcpeuro.com/public/asset...-2521502-2.JPG, removed the old one and replace with new one. I didn't apply lubricant to the edge or back of braking pad, only apply lubricant to the rear sliding pin. I have already done with several moderate stops, I think bedding-in should be fine
not sure if those are "anti-squeal shims" you are referring to.
I'm not sure the noise come from with corner yet, hard to tell.
I used the hardware shown in https://www.fcpeuro.com/public/asset...-2521502-2.JPG, removed the old one and replace with new one. I didn't apply lubricant to the edge or back of braking pad, only apply lubricant to the rear sliding pin. I have already done with several moderate stops, I think bedding-in should be fine
not sure if those are "anti-squeal shims" you are referring to.
Last edited by wanghaixiongf1; Jan 22, 2026 at 02:01 AM.
