Air leaking sound when pressing brake pedal

Jun 13, 2019 | 08:03 PM

Maxxxx

Thread Starter

Newbie

Joined: Jun 2019

Posts: 1

Likes: 0

From: PA

2014 E350 4MATIC

Air leaking sound when pressing brake pedal

Hey folks! Bought few days ago 2014 E350 4MATIC, and today found my first problem - annoying sound somewhere from brake pedal, when I'm driving at low speed like parking lot or stop signs and pushing brake pedal (5-10%) I'm hearing this sound, mostly like from vacuum booster, I read about booster seal but can't find this thread now but there was problem with DEPRESSING break pedal, attached video with clear sound, please suggest!

P.S. I had 2017 Accord before, E-Class is pretty fantastic

Last edited by Maxxxx; Jun 13, 2019 at 08:59 PM.

Jun 14, 2019 | 06:06 AM

drdantheman1

Member

Joined: Feb 2018

Posts: 96

Likes: 21

From: Miami, FL

2014 e250 bluetec

LOL this reminds me of my clown horn brake pedal when I first purchased my w212. Same issue. It's the brake booster, it needs to be replaced.

Jun 14, 2019 | 07:12 AM

lakepop

Member

Joined: Mar 2013

Posts: 85

Likes: 15

From: North Carolina

2011 E350, 2015 E350 Sport

Yep.......Brake booster needs to be replaced

Jun 14, 2019 | 10:37 AM

MBENZTECH

Super Member

Joined: Feb 2007

Posts: 601

Likes: 285

From: Republic of Texas

W203 W212 W211 R53MCS

That sure is your brake booster..... never had one failed or leaked. Funny sound

Jun 14, 2019 | 11:37 AM

TeeEl

Senior Member

Joined: Nov 2018

Posts: 443

Likes: 69

From: California

2013 E550 4MATIC - P1, P2, SPORT

HAHAHA. Sounds like you're stepping on a goose.

... not that I know what that sounds like...

Jun 14, 2019 | 02:46 PM

RA72825

Banned

Joined: Oct 2005

Posts: 4,957

Likes: 1,640

Now we all know that sound, which is very distinctive. Thanks for the video!

Jun 14, 2019 | 05:03 PM

TeeEl

Senior Member

Joined: Nov 2018

Posts: 443

Likes: 69

From: California

2013 E550 4MATIC - P1, P2, SPORT

Someone should overly the OP's video with the audio from this:

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Jul 2, 2019 | 04:35 PM

kp1

Junior Member

Joined: Sep 2016

Posts: 49

Likes: 13

2014 E350 4Matic Sport

konigstiger, thanks for posting up the documentation for replacing the brake booster.

That'll make life easier when I put the new booster on my wife's e350. Funny thing, since I bought the new booster & put it on the shelf in the garage, the original booster hasn't squeeked a single time.