- Vehicles
- 350,294
- Built between
- Not published
- Models
- 19
- Recall type
- Vehicle
- Initiated by
- Manufacturer
- Owners notified
- 30 June 2022
- Repaired
- 43%
- Unrepaired
- 142,884
Safety advisories
Do not drive this vehicle
NHTSA and the manufacturer advise that affected vehicles should not be driven until the recall repair has been completed. Contact your dealer to arrange the repair, and ask about transport in the meantime.
Does this affect my vehicle?
The manufacturer did not publish a build-date range for this recall, so the model and year list below is the only way to tell whether your vehicle is covered.
- 2007 Mercedes-Benz AMG R63
- 2007-2009 Mercedes-Benz GL320
- 2007-2009 Mercedes-Benz GL450
- 2008-2009 Mercedes-Benz GL550
- 2007-2009 Mercedes-Benz ML320
- 2006-2009 Mercedes-Benz ML350
- 2006-2007 Mercedes-Benz ML500
- 2008-2009 Mercedes-Benz ML550
- 2007-2009 Mercedes-Benz R320
- 2006-2007 Mercedes-Benz R500
- 2007-2011 Mercedes-Benz AMG ML63
- 2010-2012 Mercedes-Benz GL350
- 2010-2012 Mercedes-Benz GL450
- 2010-2012 Mercedes-Benz GL550
- 2010-2011 Mercedes-Benz ML350
- 2010-2011 Mercedes-Benz ML450
- 2010-2011 Mercedes-Benz ML550
- 2006-2012 Mercedes-Benz R350
- 2008 Mercedes-Benz R550
Repair progress
142,884 of 350,294 vehicles in this recall had still not been repaired as of Q4 2025.
43% repaired — 149,456 of 350,294 reported
- Scrapped or exported
- 57,954
Manufacturers file these figures with NHTSA each quarter. Vehicles the manufacturer could not trace, or that have been scrapped or exported, are counted separately and are not included in the unrepaired figure.
What the defect is
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.
What could happen
Reduced brake performance or brake failure can increase the risk of a crash.
What gets fixed
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.
Parts involved
- Brake BoosterA1644310427Brake Booster
- Brake BoosterA1644310527Brake Booster
- Brake BoosterA1644310627Brake Booster
Part numbers are as filed by the manufacturer and are listed for reference. Your dealer will confirm the correct part for your vehicle.
Timeline
- Recall reported to NHTSA9 May 2022
- Owners notified30 June 2022
- Latest repair reportQ4 2025 — 43% repaired
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 9 May 2022.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Manufacturer contact
Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers for this recall are 2022050014, 2022050015 2022090006, & 2022090007.
Official source
- Manufacturer's recall number
- See Recall Schedule
- Recalling manufacturer
- Mercedes-Benz USA, LLC
- Recall initiated by
- MFR
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional 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 your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.