Brake Booster Corrosion May Impair Braking – 2006-2012 Mercedes-Benz ML, GL, & R-Class

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April 26, 2024 NHTSA CAMPAIGN NUMBER: 24V298000

Brake Booster Corrosion May Impair Braking

Reduced brake performance or brake failure can increase the risk of a crash.

 

NHTSA Campaign Number: 24V298

Manufacturer Mercedes-Benz USA, LLC

Components SERVICE BRAKES, HYDRAULIC

Potential Number of Units Affected 15,604

 

Summary

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML, GL, and R-Class vehicles. Please refer to MBUSA’s recall report for specific vehicle model details. Moisture may accumulate and cause corrosion in the brake booster housing unit, which can result in reduced brake performance or brake failure.

 

Remedy

Owners are advised not to drive their vehicles until the remedy has been performed. Dealers will remove the rubber sleeve, inspect the brake booster, and as necessary, replace the brake booster. All repairs will be performed free of charge. Owner notification letters are expected to be mailed May 17, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MMUSA’s number for this recall is 2024050001/2. This recall is an expansion of previous recall number 22V-315.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.

 

Check if your Mercedes-Benz has a Recall

 


Recall Campaign Launch Notification STOP DRIVE
Inspect and Replace Brake Booster
without Pedal Rework
MY06-12 GL-Class, ML-Class, R-Class
(164 and 251 platform)

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Recall Campaign Launch Notification STOP DRIVE
Inspect and Replace Brake Booster
with Pedal Rework
MY06-12 GL-Class, ML-Class, R-Class
(164 and 251 platform)

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Mercedes-Benz Part 573 Submission
Submited to Portal April 26, 2024
Chronology-Only section

Chronology of Defect/Noncompliance Determination Supplement for ODI 22-00855-27860-10

In July 2021, MBAG launched initial investigations based on an individual field report from outside the US describing an instance in which a customer allegedly experienced a reduced brake force support. No damages or personal injuries were reported. Parts of the affected vehicle were requested for further analysis. MBAG determined that, in the analyzed case, the function of the brake booster was impaired and corrosion of the brake booster housing was observed.

Starting in August 2021, further analyses was conducted regarding a potential failure mechanism, root cause and potential consequences. These analyses included investigations of parts procured from used parts suppliers, corrosion tests and functional tests of the brake booster in order to study the influence of continuous corrosion to the mechanical integrity and function of the brake booster.

Additionally, in September 2021, a field study was initiated in order to analyze the level of corrosion on brake booster housings in vehicles in different countries and regions worldwide.

In November 2021, investigations were conducted to study mechanisms that might lead to water application on the brake booster, thus allowing the observed corrosion to initiate.

From December 2021 onwards, additional corrosion tests on used parts from the field were conducted together with the supplier in order to determine the further progression of corrosion on parts in the field and the impact to the functionality of the brake booster.

From January 2022, potentially affected vehicles in the field were determined based on production records and information on the development of the fleet in operation.

From March 2022 onwards, results of the field study were evaluated in order to determine the distribution of corrosion levels in the field and to prepare a risk evaluation.

In March 2022, only one case was identified in the US where poor brake performance was caused by a corroded brake booster.

On May 2, 2022, MBAG determined that a potential safety risk could not be ruled out and decided to conduct a recall.

MBUSA initially contacted the agency on May 5, 2022 to inform NHTSA of a related safety recall, 22V315, stop drive instructions for that recall and that communications with owners would start as soon as possible.

On April 19, 2024 MBUSA identified 15,604 vehicles that had their recall statuses for 22V315 properly included in all Mercedes-Benz dealer systems, as well as the MBUSA recall website and the NHTSA recall website beginning on May 16, 2022 but whose owners did not receive a notification leter and have not yet been inspected by an authorized Mercedes-Benz dealer. Based on discussions with NHTSA on April 24, 2024, MBAG decided to file a separate Part 573 report for these vehicles.

There have been no reported crashes, injuries, fatalities, or property damage caused by this defect in the US.

 


Inspect Brake Booster – 2006-2012 Mercedes-Benz ML-Class, GL-Class, & R-Class

 

Inspect Brake Booster – 2006-2012 Mercedes-Benz ML-Class, GL-Class, & R-Class

 


54 Affected Products 

Vehicles

MAKE MODEL YEAR
MERCEDES BENZ AMG R63 2007
MERCEDES BENZ GL320 2007-2009
MERCEDES BENZ GL350 2009-2012
MERCEDES BENZ GL450 2007-2012
MERCEDES BENZ GL550 2008-2012
MERCEDES BENZ ML320 2007-2009
MERCEDES BENZ ML350 2006-2011
MERCEDES BENZ ML450 2010-2011
MERCEDES BENZ ML500 2006-2008
MERCEDES BENZ ML550 2008-2011
MERCEDES BENZ R320 2007-2009
MERCEDES BENZ R500 2006-2007
MERCEDES-BENZ AMG ML63 2007-2011
MERCEDES-BENZ R350 2006-2012

 


9 Associated Documents

Recall Acknowledgement

RCAK-24V298-6903.pdf 645.671KB

 


Defect Notice 573 Report

RCLRPT-24V298-1454.PDF 224.678KB

 


Chronology

RMISC-24V298-3533.pdf 131.998KB

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Remedy Instructions and TSB

RCRIT-24V298-0919.pdf 1286.196KB

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Remedy Instructions and TSB

RCRIT-24V298-2259.pdf 1286.646KB

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Recall 573 Report-05/10/2024

RCLRPT-24V298-5397.PDF 224.68KB

 


Manufacturer Notices(to Dealers,etc)

RCMN-24V298-4899.pdf 1521.259KB

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Recall 573 Report-5/10/2024

RCLRPT-24V298-7992.PDF 224.68KB

 


Manufacturer Notices(to Dealers,etc)

RCMN-24V298-8548.pdf 1521.142KB

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Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=24V298&docType=RCL

 


 

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Direct Replacement Brake Booster for Select 1984-1997 Mercedes-Benz Models
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VIPCAR 724807410 Brake Booster Vacuum Pump for Mercedes-Benz 2006-2011 Selected [2.5-3.5L V6] Models, C230/C280/C300/C350, E350, R350, ML350, SLK280/SLK300
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A-Premium Brake Vacuum Pump Compatible with Select Mercedes-Benz Models - C230/C280 2006-2007, C300 2008-2011, C350/E350/ML350/R350 2006-2011, SLK280 2006-2008, SLK300 2009-2011
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Last update on 2024-06-04 / Affiliate links / Images from Amazon Product Advertising API

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