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

May 9, 2022 NHTSA CAMPAIGN NUMBER: 22V315000

Brake Booster Corrosion May Impair Braking

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

 

NHTSA Campaign Number: 22V315

Manufacturer Mercedes-Benz USA, LLC

Components SERVICE BRAKES, HYDRAULIC

Potential Number of Units Affected 292,287

 

Summary

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2006-2012 ML-Class, GL-Class, 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 were mailed June 30, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA’s numbers for this recall are 2022050014, 2022050015 2022090006, & 2022090007.

 

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

 


Mercedes-Benz Part 573 Submission
Original Submitted to Portal May 9, 2022 Chronology-Only section
Supplement to Original Submission

 

Chronology of Defect/Noncompliance Determination

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 contacted the agency on May 5, 2022 to inform NHTSA of this safety recall, stop drive instructions and that communications with owners would start as soon as possible.

 

MBAG can confirm there are no crashes, injuries or deaths related to this defect.

 


53 Affected Products 

Vehicles

MAKE MODEL YEAR
MERCEDES BENZ AMG R63 2007
MERCEDES BENZ GL320 2007-2009
MERCEDES BENZ GL350 2010-2012
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 2006-2007
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
MERCEDES-BENZ R550 2008

 


38 Associated Documents

Recall 573 Report – May 11, 2022

RCLRPT-22V315-3653.PDF 223.654KB

RCLRPT-22V315-3653

 


Chronology Report

RMISC-22V315-4181.pdf 217.026KB

RMISC-22V315-4181

 


Recall Acknowledgement

RCAK-22V315-1723.pdf 691.557KB

RCAK-22V315-1723

 


Recall 573 Report

RCLRPT-22V315-9275.PDF 223.385KB

RCLRPT-22V315-9275

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-7745.pdf 260.894KB

RCMN-22V315-7745

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-4738.pdf 552.523KB

RCMN-22V315-4738

 


Remedy Instructions and TSB

RCRIT-22V315-5345.pdf 1640.399KB

RCRIT-22V315-5345

 


Remedy Instructions and TSB

RCRIT-22V315-1022.pdf 1640.048KB

RCRIT-22V315-1022

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-4850.pdf 1649.418KB

RCMN-22V315-4850

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-2312.pdf 1649.276KB

RCMN-22V315-2312

 


Recall 573 Report – June 16, 2022

RCLRPT-22V315-9875.PDF 223.684KB

RCLRPT-22V315-9875

 


Remedy Instructions and TSB

RCRIT-22V315-2808.pdf 1863.15KB

RCRIT-22V315-2808

 


Remedy Instructions and TSB

RCRIT-22V315-1213.pdf 1947.626KB

RCRIT-22V315-1213

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-5761.pdf 1947.626KB

RCMN-22V315-5761

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-1718.pdf 1863.15KB

RCMN-22V315-1718

 


Recall 573 Report – July 1, 2022

RCLRPT-22V315-3577.PDF 223.679KB

RCLRPT-22V315-3577

 


Owner Notification Letter(Part 577)

RCONL-22V315-3109.pdf 1709.534KB

RCONL-22V315-3109

 


Recall Quarterly Report #1, 2022-2

RCLQRT-22V315-8124.PDF 211.152KB

RCLQRT-22V315-8124

 


Remedy Instructions and TSB

RCRIT-22V315-6512.pdf 1636.535KB

RCRIT-22V315-6512

 


Remedy Instructions and TSB

RCRIT-22V315-4430.pdf 1666.398KB

RCRIT-22V315-4430

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-8491.pdf 303.654KB

RCMN-22V315-8491

 


ISSUED Renotification Notice

RCRN-22V315-0751.pdf 1885.145KB

RCRN-22V315-0751

 


Recall 573 Report – September 8, 2022

RCLRPT-22V315-3208.PDF 252.549KB

RCLRPT-22V315-3208

 


Remedy Instructions and TSB

RCRIT-22V315-8322.pdf 1210.473KB

RCRIT-22V315-8322

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-7339.pdf 1677.904KB

RCMN-22V315-7339

 


Remedy Instructions and TSB

RCRIT-22V315-2969.pdf 1215.201KB

RCRIT-22V315-2969

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-3943.pdf 1684.579KB

RCMN-22V315-3943

 


Recall Quarterly Report #2, 2022-3

RCLQRT-22V315-1195.PDF 211.259KB

RCLQRT-22V315-1195

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-5865.pdf 644.125KB

RCMN-22V315-5865

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-1455.pdf 829.07KB

RCMN-22V315-1455

 


Remedy Instructions and TSB

RCRIT-22V315-1342.pdf 502.598KB

RCRIT-22V315-1342

 


Remedy Instructions and TSB

RCRIT-22V315-7945.pdf 314.989KB

RCRIT-22V315-7945

 


Recall 573 Report – October 24, 2022

RCLRPT-22V315-2742.PDF 223.772KB

RCLRPT-22V315-2742

 


Recall 573 Report – November 2, 2022

RCLRPT-22V315-8520.PDF 223.808KB

RCLRPT-22V315-8520

 


Recall 573 Report – November 1, 2022

RCLRPT-22V315-6264.PDF 223.806KB

RCLRPT-22V315-6264

 


ISSUED Owner Notification Letter(Part 577)

RCONL-22V315-5428.pdf 1436.617KB

RCONL-22V315-5428

 


Recall Quarterly Report #3, 2022-4

RCLQRT-22V315-2425.PDF 211.355KB

RCLQRT-22V315-2425

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V315-0913.pdf 375.144KB

RCMN-22V315-0913

 


Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=22V315&docType=RCL

 


 

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