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Gle 350d 2021 annoying brake pedal squeak/ squeal w167

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Old Mar 11, 2022 | 04:32 PM
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Gle 350d
Gle 350d 2021 annoying brake pedal squeak/ squeal w167

Hi everyone

i have a gle350d 2021, have recently had an issue where my brake pedal squeaks, i booked it in with mercedes and they claimed they resolved the issue by greasing the pivot on the brake pedal.

i walked over to my car and found that the issue was still present. Went back inside and was told they will have a senior technician have a look at it.

today i received a call saying they have ordered a new brake pedal assembly from mercedes germany. My question is has anyone experienced this before as to me this sounds like a booster issue and not a pedal issue.

I did mention to them that this issue is not a pedal issue but sounds more to do with the booster however they stated its the first point repair they need to do. Surely they should be trained enough to diagnose the issue.

any advice is appreciated. Ive attached a video of the issue.

to note my vehicle is still with mercedes

https://www.dropbox.com/s/9a90levwml...%2021.mov?dl=0

Last edited by zaidar61s!; Mar 11, 2022 at 09:34 PM.
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Old Mar 11, 2022 | 08:55 PM
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I have the same issue with my 2020 GLE 450, and they replaced both the master cylinder and the brake booster and that resolved the issue.
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Old Mar 11, 2022 | 09:40 PM
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Originally Posted by zengshengliu
I have the same issue with my 2020 GLE 450, and they replaced both the master cylinder and the brake booster and that resolved the issue.
I too had the same annoying issue. Mercedes replaced the booster and master cylinder under warranty. So far so good.
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Old Mar 18, 2022 | 04:12 PM
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Gle 350d
Originally Posted by zengshengliu
I have the same issue with my 2020 GLE 450, and they replaced both the master cylinder and the brake booster and that resolved the issue.
do you by any chance have a document to show what mercedes did to your vehicle under warranty? Would help me as my mercedes dealership have still got my vehicle and are struggling to identify the issues even though i have advised them to look into the booster and mastercylinder
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Old Mar 18, 2022 | 05:16 PM
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Originally Posted by zaidar61s!
do you by any chance have a document to show what mercedes did to your vehicle under warranty? Would help me as my mercedes dealership have still got my vehicle and are struggling to identify the issues even though i have advised them to look into the booster and mastercylinder
This is what is on my work order. For some reason, the part for the master cylinder wasn't listed, but the note from technician indicated that it was replaced also.


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Old Mar 21, 2022 | 08:27 PM
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Gle 350d
Originally Posted by zengshengliu
This is what is on my work order. For some reason, the part for the master cylinder wasn't listed, but the note from technician indicated that it was replaced also.

thank you very much mercedes have ordered the booster and master cylinder thanks to this

A update for everyone else. The squeaky sound was usually noticeable when the car was cold. Apparently the noise wasn't heard by the mercedes techs until today when i visited. tech confirmed the noise was present and after showing the repair sheet from zengshengliu they agreed the master cylinder and booster needed replacing.


Last edited by zaidar61s!; Mar 21, 2022 at 08:32 PM.
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Old Oct 10, 2022 | 01:40 PM
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Gle 350d
Originally Posted by zengshengliu
I have the same issue with my 2020 GLE 450, and they replaced both the master cylinder and the brake booster and that resolved the issue.
hello did your issue reappear or was it resolved
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Old Oct 10, 2022 | 01:46 PM
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Gle 350d
Originally Posted by gle400matt
I too had the same annoying issue. Mercedes replaced the booster and master cylinder under warranty. So far so good.
hello matt

Is your issue resolved or has it reappeared?
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Old Oct 10, 2022 | 02:21 PM
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Originally Posted by zaidar61s!
hello matt

Is your issue resolved or has it reappeared?
As of today, the noise hasn't reappear, so I would say its resolved for now.
(but I can't say for sure 6 months down the line since I can't predict the future )
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Old Dec 27, 2025 | 01:31 AM
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Finding a reliable Mercedes service centre in London really comes down to reviews, technician experience, and transparent pricing. I usually compare a few options and plan ahead so there are no last-minute surprises. That’s similar to how I stay organized with other things by checking details through Genesee Court System when accuracy matters. A bit of upfront research always saves time and hassle in the long run.
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