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Mercedes-Benz ML350 Recall 22V315: Moisture Can Corrode Brake Booster, Causing Brake Failure

NHTSA campaign 22V315, reported May 9, 2022, 350,294 vehicles potentially affected.

What this recall means for you

Moisture can build up inside the brake booster housing of certain Mercedes-Benz ML-Class, GL-Class, and R-Class vehicles from model years 2006 and 2007. Over time, this moisture can cause corrosion, which may reduce brake performance or cause the brakes to fail.

Reduced braking or brake failure raises the risk of a crash. Because of this, the manufacturer advises owners not to drive affected vehicles until the remedy has been performed. Owners should contact an authorized Mercedes-Benz dealer to schedule the repair.

The repair is free of charge. Dealers will remove the rubber sleeve, inspect the brake booster, and replace the brake booster if necessary. Owners can also contact Mercedes-Benz USA customer service at 1-800-367-6372, and should check their vehicle identification number (VIN) for open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 22V315Mercedes-Benz USA, LLC
Component
SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM
Problem
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.
Risk
Reduced brake performance or brake failure can increase the risk of a crash.
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.

Affected vehicles

Mercedes-Benz AMG ML6320072008200920102011
Mercedes-Benz AMG R632007
Mercedes-Benz GL320200720082009
Mercedes-Benz GL350201020112012
Mercedes-Benz GL450200720082009201020112012
Mercedes-Benz GL55020082009201020112012
Mercedes-Benz ML320200720082009
Mercedes-Benz ML350200620072008200920102011
Mercedes-Benz ML45020102011
Mercedes-Benz ML50020062007
Mercedes-Benz ML5502008200920102011
Mercedes-Benz R320200720082009
Mercedes-Benz R3502006200720082009201020112012
Mercedes-Benz R50020062007
Mercedes-Benz R5502008