Mercedes Recalling Almost One Million Cars Over Bad Brake Boosters

Matt Posky
by Matt Posky
mercedes recalling almost one million cars over bad brake boosters

Over the weekend, Mercedes-Benz announced a global recall campaign encompassing nearly a million vehicles it believes could be afflicted with faulty brake boosters.

“We have found that in some of those vehicles, the function of the brake booster could be affected by advanced corrosion in the joint area of the housing,” the automaker explained in a statement.

While the issue is global, the United States is believed to account for roughly 300,000 units, with the National Highway Traffic Safety Administration (NHTSA) advising against driving any vehicle involved in the recall. Affected units will undoubtedly offer lowered braking performance and can even cause total brake failure in some instances. Rare or not, the NHTSA feels this one is simply too risky to chance.

Affected vehicles include GL, ML, and R-Class Mercedes-Benz products manufactured between 2006 and 2012 ( a comprehensive list is available here). U.S. regulators are basically going off the MBUSA recall report citing the possibility for moisture to accumulate and cause corrosion within the brake booster housing. The planned fix involves having dealers look at the entire unit and replace them “as necessary.”

Mercedes said there were no known injuries relating to the matter. However, the NHTSA is mighty concerned about a potential vacuum leak creating problems for people on the road. A leaky booster will probably result in a mushy or unresponsive brake pedal and longer stopping distances on the road. Due to the potential hazard (and risk of outright brake failure), the agency has advised all owners not to drive any model under recall until it’s been serviced.

Mercedes first noticed the issue in 2021, launching an internal investigation that fall. The automaker felt confident that the risk was sufficient to launch a recall by May of 2022 and made a formal announcement over the weekend.

Those concerned about their vehicle can toss their vehicle identification number (VIN) into the NHTSA database or use the recall campaign code 22V315000. Alternatively, customers can also contact Mercedes-Benz directly at 1-800-367-6372 or use the NHTSA safety hotline at 1-888-327-4236.

[Image: Mercedes-Benz]

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4 of 14 comments
  • Indi500fan Indi500fan on Jun 07, 2022

    Given the amount of vacuum leaks I see on 15 yr old brands of "everything", I really don't see this as Armageddon.

  • Jkross22 Jkross22 on Jun 07, 2022

    Kudos to Mercedes for the recall. These are old cars, long past the original leasee and cpo owner. Unlikely they'll gain new customers as a result of this. I recently got a recall for my 15 year old car for a PVC heater replacement, also due to safety risks. Carmakers aren't in the habit of doing things out of the goodness of their non-existent hearts or because it's the moral thing to do, but I will call out every time they do something good for customers who - as has already been stated - aren't really even Merc customers.

    • See 1 previous
    • Jkross22 Jkross22 on Jun 07, 2022

      @golden2husky I am fully aware. Worthy of an attaboy nonetheless.

  • Bullnuke Well, production cuts may be due to transport-to-market issues. The MV Fremantle Highway is in a Rotterdam shipyard undergoing repairs from the last shipment of VW products (along with BMW and others) and to adequately fireproof it. The word in the shipping community is that insurance necessary for ships moving EVs is under serious review.
  • Frank Wait until the gov't subsidies end, you aint seen nothing yet. Ive been "on the floor" when they pulled them for fuel efficient vehicles back during/after the recession and the sales of those cars stopped dead in their tracks
  • Vulpine The issue is really stupidly simple; both names can be taken the wrong way by those who enjoy abusing language. Implying a certain piece of anatomy is a sign of juvenile idiocy which is what triggered the original name-change. The problem was not caused by the company but rather by those who continuously ridiculed the original name for the purpose of VERY low-brow humor.
  • Sgeffe There's someone around where I live who has a recent WRX-STi, but the few times I've been behind this guy, he's always driving right at the underposted arbitrary numbers that some politician pulled out of their backside and slapped on a sign! With no gendarmes or schoolkids present! Haven't been behind this driver on the freeway, but my guess is that he does the left lane police thing with the best of 'em!What's the point of buying such a vehicle if you're never going to exceed a speed limit? (And I've pondered that whilst in line in the left lane at 63mph behind a couple of Accord V6s, as well as an AMG E-Klasse!)
  • Mebgardner I'm not the market for a malleable Tuner / Track model, so I dont know: If you are considering a purchase of one of these, do you consider the Insurance Cost Of Ownership aspect? Or just screw it, I'm gonna buy it no matter.The WRX is at the top of the Insurance Cost pole for tuner models, is why I ask.