2022 Mercedes-Benz S-Class Brakes Problems

On multiple occasions, after the vehicle had been parked and not driven for approximately five days or more, the automatic parking brake locked in place and would not release. I attempted standard methods to disengage the brake, including manual release procedures and lightly rocking the vehicle, without success. The only way to release the brake was to apply significant pressure to the accelerator while in reverse, which caused the brake to suddenly unlock. The first incident occurred while the vehicle was parked in my home garage. At the time, my grandson was playing nearby. The sudden release of the brake after applying the accelerator created a dangerous situation and was extremely alarming. A second incident occurred several days later while I was on vacation. In this instance, I made sure no one was near the vehicle before attempting to release the brake. Anticipating the issue, I had my left foot ready to push on the breaks when I accelerated using my right foot which releases the parking. I brought the vehicle to a Mercedes-Benz dealership on January 5, 2026, where the car remained for nearly ten days. The dealership was able to replicate the issue exactly as described. The service advisor also had to apply significant accelerator pressure to release the locked parking brake. A certified Mercedes-Benz technician inspected the vehicle thoroughly, including scanning for fault codes and checking for rust or mechanical issues, but ultimately advised that this behavior was considered “normal operation.” I find this explanation concerning. Having to apply forceful acceleration to release a locked parking brake presents a clear safety risk, particularly in confined spaces such as garages or parking structures, and could easily result in property damage or personal injury

Brakes seize when wet. That is, after a car wash or following exposure to rain, the accelerator must be pressed with abnormally greater pressure to get car moving from parked position. Loud, screeching sound emanates when brake releases. This malady continues severally. Resting lightly on brake pedal to dry out turning brake rotors, does not help. Eventually, problem disappears until the next wet episode. -Per Mercedes Authorized Dealer, there is no fix; problem is common to Mercedes 223 series. -Risk of collision exists in both modes, Drive as well as Reverse. This, due to sudden jump forward or rearward under brake-seize conditions. -Issue is ongoing, not a single incident. Remains unresolved. [At age [XXX] , I have over [XXX] driving experience. The above is an abnormal-with-risk, issue.] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

While driving on highway car made a complete sudden full stop This has happened twice in last 60 days Thankful car behind was far enough away to avoid a rear ender Second problem is dealer still not addressing fuel pump recall

I have had two separate incidents where the automatic braking system engaged causing vehicle to come to a complete stop almost causing me to get rear ended by another vehicle. The first time there was no sign of a vehicle in the front of me. It happened at about 55 miles an hour on the expressway. I took the vehicle back to the dealer and they claim they haven't had any issues so they download some new software and said that should take care of the problem. The second time happened today. I was entering a roundabout at 15 miles an hour (there was a vehicle about 15 feet ahead of me) my vehicle suddenly stopped (vehicle behind me hit their brakes almost hitting me). I emailed the dealer a video clip of the incident but have had no response at this point. I have lost confidence in the safety of the vehicle at this point. I have a dash cam video I can send if needed.

The contact owns a 2022 Mercedes-Benz S580. The contact stated that while driving approximately 50 MPH and entering the highway, the vehicle experienced an inadvertent brake failure. There was no warning light illuminated. The vehicle was taken to the local dealer where it was diagnosed and determined that a software update was needed. The vehicle was repaired; however, the failure persisted. The contact stated that on another occasion while driving approximately 15 MPH, the failure recurred. The contact was able to depress the brake pedal and then continued driving. The contact stated that several unknown warning lights became illuminated. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 1,000.