Service Brakes Problems of Mercedes Benz C250

I was coming off the freeway on 9/25/25, and when I pressed on the breaks they completely locked up and would not break at all. The car turned off, no warning lights nothing, and I continued to hit the break and the car would not stop, then all of a sudden it came to a stop almost colliding within inches of hitting the semi-truck in front of me. This is the second time in one year that this has happened to me, I have had the car checked out the first time last year immediately, and even paid to diagnose it, nothing, I had the brakes and rotors replaced last June of 2024 when this happened. Since then the car has only been in the dealership to get the car fully checked out mutltiple times within 2024, 2025 and repaired by mercedes dealership. On 9/25/25 this happened to me and it was a traumatic experiance when I pressed the break and the break got super hard and in a locked position and would not come to a stop, there was no warning lights, no engine lights, nothing. (increased braking effort, and potentially I was inches of collision risk. I had the car towed to the nearest shop and was told this is a collapsed break booster vacuum pump, and possibly the hose and lines and possibly further problems but they would need to replace the vacuum pump first. After I looked to see if there was a recall on the vacuum pumps in that model on google and it says the following; google- 2014 mercedes C250 recall on vacuum pump a-premium vacuum pump compatible with select mercedes . . . Yes, there was a recall on certain mercedes-benz vehicles, including some 2014 C250 models, related to a defective brake booster vacuum hose. The recall involves hoses that may delaminate over time, leading to a loss of vacuum, increased braking effort, and potentially a collision risk. To check if your specific 2014 C250 is affected by this recall, you should contact an authorized mercedes-benz dealer or visit the mercedes-benz USA website to check for open recalls for your vehicle's VIN.

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-the steering wheel and brake locked up and became unusable while driving at approximately 75mph. Cruise control was enabled for a few miles (maybe 2) and disabled after. Around 5 minutes after disabling, the car began to surge between acceleration and deceleration drastically on its own. All of the dashboard lights that come on when the key is initially inserted came on at once while engine was on/running and the car was in drive. After finally being able to reach a safe enough spot, I put the car in park and turned the engine off. I sat for a few minutes to try and turn the engine/car back on and the car would not crank, but the overhead lights, radio, and dash lights were functioning. -this was an extremely dangerous experience. The car began to decelerate rapidly in heavy freeway traffic. At that speed, with many semi-trucks traveling nearby, this sudden loss of speed created an extremely dangerous situation. My vehicle instantly became a slow moving obstacle in the lane. Only by luck and quick reaction was a serious or fatal collision avoided. The car would not start back up so I was sitting at the edge of the highway as many cars flew by just inches away from my car. -I am away at college in a rural city. Accessibility is limited as well as support because of lack of resources. -the car was towed to a mechanic who does not specialize in german cars and stated they did not have the proper tools to "get into the car" because the motor is "locked up" and the car wouldn't crank. -the vehicle will be towed to the nearest dealership (50mi away) who stated they won't be able to look at it for a few weeks from date of arrival. Research indicates this may be linked to a known issue with electronic steering lock (esl) / electronic ignition switch (eis) failure in mercedes vehicles, which can electronically disable the engine and steering. This could've easily been fatal for me and still poses an alarming threat if not addressed.

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Lost of drive power and the vehicle steering wheel locked on my mercedes from a damaged malfunctioning steering lock actuator module due to mechanical issues within the steering column such as bad steering wheel assembly, faulty steering lock module or issue with the wiring or other electrical components and the mercedes dealer is the only one who solves this issue no other mechanic in general. My safety was at risk due to I lost power and lost of front brakes due to bad sway bar assembly or components could of caused and accident when this happened on November 12, 2024 the problem dealership found during vehicle inspection was code 25464 they told me recommend to replace electric lock module and repair estimate was $2,829. 78 and before I approved the the amount I told mr ivan velasco service advisor that after they replace the module that if my vehicle was going to be working again and that if I was just going to make 1 payment of $2,829. 78 then I would approved it so I did. Weeks later I got an email asking for more money they wanted another payment for $600 saying it needed a sensor that has something to do with the transmission because after replacing the new module the vehicle did not start up there was no type of communications nothing at all and I responded that I was not going to pay $600 more just cause they don't know what their doing because they promise me the car was going to work after they replace the module now that it did not want to crank up they found another issue that's their fault on not doing there job the right way and for telling lies yes their was flashing blue or red icon on my dashboard that look like a car and a lock would go on and off and it displayed a message saying the theft protection is activated. I want to know if I can get this issue approved and to be considered a recall can you please help I'm so frustrating and mad that they want more money when it's already so expensive please help I would of appreciate it thank you.

On 6/20/23 I was driving this vehicle on the 5 freeway north bound exit 102 in washington. I found myself travelling at 60mph just moving over to the middle lane of traffic. I needed to slow the vehicle a little and pushing down on brakes I found there was no reaction from the braking system. Making a quick decision I moved over to the emergency lane where I came to a stop. There were no warning signs of the issue. I had the vehicle towed to my Mercedes Benz dealership where I had the car service the day before on 6/19/23 where nothing was noted on this problem. After inspection from the technician at the dealership it was found that the brake vacuum pump was no longer working. Which technician said had caused the issue and he had never experienced this issue before. I am bringing this to your attention due to it could have caused a fatal accident to with me and other people on the freeway.

With no prior warning indicator on braking issues with my 2014 C250, I travelled from ormond beach FL to savannah GA, on I-95 with one stop in kingsland GA. I still had no warning indicator on breaking issues as I took the off-ramp to savannah. A failure occurred with the braking system as I exited I-95, with no vehicle warning indicator shown before or after I came to a stop. I had to exert maximum pressure on the brake to stop, requiring an expansion clear length of off-ramp to do so. An elderly, weaker person or even my wife wouldn’t have had the strength to stop over the distance I stopped it in. Luckily there was no vehicles stopping in front of me, otherwise I would have hit them at high speed. At savannah mercedes they found a faulty vacuum pump, & like me were perplexed that no prior warning indicator showed up on my vehicle. This issue has obviously caused me great concern & indicates an inherent dangerous & life-threatening condition with my, & I assume other 2014 c-250’s, if not other years and models. If this dangerous failure had occurred on I-95 as traffic slowed to a stop, I would have run into the vehicle in front of me & my wife & could have been killed. More menacingly, it would most probably have been reported that I wasn’t paying attention & it was my fault rather that a catastrophic dangerous manufacturer failure with my vehicle. It sadly seems to me that this scenario may actually have happened with some mb vehicles and the driver/s are not around to say.

The contact owns a 2014 mercedes-benz C250. The contact stated while driving approximately 75 - 80 mph, the brakes failed, and the brake pedal was stiff while depressed. The vehicle was towed to the dealer and diagnosed with brake vacuum pump failure. The brake vacuum pump needed to be replaced. The vehicle was not repaired and remained at the dealer. The brake vacuum pump was previously replaced by an independent mechanic for the recurring failure. The manufacturer was not made aware of the failure. The failure mileage was approximately 85,535. The VIN was unavailable.

Driving on the freeway I-5 southbound in orange county, California when my brakes failed. 1) there was no warning in advance of this episode, no squeaky brakes, no leaking of oil or fluid. 2) car had been routinely repaired and maintained by the mercedes dealership. 3)an independent mercedes mechanic.

The contact owns a 2014 mercedes-benz C250. The contact stated that while her daughter was driving at various speeds, she depressed the brake pedal but it hesitated to respond. As a result, excessive force was applied to the brake pedal in order to slow down the vehicle. Due to the failure, the driver lost control of the vehicle and crashed into the barrier wall and the metal fence. No air bags were deployed. The contact's daughter sustained a fractured nose, lip laceration, and other unknown facial injuries due to the driver hitting the steering wheel during the impact. No medical attention was contacted yet but will be in the future. A police report was filed. The police transferred the vehicle from the crash site to a tow yard where the police are awaiting the insurance adjustor. Damages were to the front end. The manufacturer nor the dealer was contacted about the failure. The failure mileage was approximate 60,000.

Brakes failed to deploy, randomly, during recent trip; very dangerous; pressed brakes, would not engage and car kept moving and would not stop; pushed car into p (park) to stop moving; just completed a 225 mi trip from chicago to detroit metro area traveling at speeds between 65-70 mph with no issue, all service on vehicle is and has been conducted via mercedes authorized dealers, had vehicle in for service on morning of trip for overview and safety check prior to leaving and no known issues; after coming off freeway engaged brakes upon pulling into neighborhood and vehicle brakes failed completely-stopped engaging; no notification; no indicator lights or read out of issues related to brakes was indicated on dashboard; had we been on the freeway at the time of incident coming off an exit ramp at high speed we would have suffered a grave result, brakes failed completely. This is a danger and unacceptable for this manufacturer; vehicle has been towed to dealership, is not drivable, and is currently being assessed. This has been widely reported on other sites, regarding this specific vehicle, mercedes C250, my model year is 2012; I researched this issue, yesterday, to determine what could possibly have gone wrong as vehicle was not leaking fluids and no indication of issues during recent diagnostics and safety check two days prior. Not having sufficient braking capability with no warning or indication is dangerous, a liability to manufacturer and should be investigated immediately. Thank you.

At about 40,000 miles the parking brake began sticking and was difficult to release. This was replaced under warranty. It began happening again . I spoke to the mercedes USA and they said I would have o pay to replace it. I believe this part is defective.

While driving my 2015 C250 coupe, I had to brake hard as I was trying to avert stopped heavy traffic. When I slammed on the breaks, the steering wheel, column and entire vehicle locked up. I was unable to turn the wheel entirely. As a result, my vehicle slide into another vehicle from behind. Because both the steering and brakes locking, I was unable to maneuver the vehicle to avoid the stopped traffic. The airbags also did not deploy as they should have.

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I was driving on the freeway and my exit was coming up so I pressed on the brakes and the pedal was stiff and I could not slow the car down. Once the vehicle slowed down on its own due to me driving on a incline I turned the car off. Started the car and tried it again and I still had not power to the brakes. I inspected the vehicle and saw that the brake booster vacuum pump was leaking oil. I had to find a replacement part and install it.

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I was driving on the highway at about 60mph in the left hand lane. I was about 7 car lengths from the car in front of me as I had just moved into that lane to move to the ramp to move off the highway. The vehicle in front of me braked, and was going at a lower speed. I tried to slow down and my car did not slow. I pressed my brake to the floor and my car still would not stop. I was able to pull to the shoulder and the car finally came to a stop close to the ramp, I thought it was an isolated incident except I saw on a website, others had the same problem.

While slowing to approach a parking space, the car sped forward and jump the curve crashing into a storefront. No one injured. Stepping on the brakes did not stop or even slow down the car.

Takata recall headlight, modules component controlling the headlight, and the seal. Moist gets in the headlight and damages the light. Had to place on both headlights and the modules units in the back of headlights that controls all lights. Was in motion both times. Dashboard indicated check all lights; it was correct. Both needed serviced.

The contact owns a 2012 mercedes-benz C250. The contact stated while driving 35-40 mph and depressing the brake pedal, the brake pedal was significantly stiff, and the vehicle failed to respond as needed. The contact stated that upon standing on the brake pedal, the vehicle responded as needed. The contact stated that the failure recurred while driving 65 mph. The vehicle was taken to the dealer, where the vacuum pump was replaced; however, the failure recurred. The vehicle was taken to mercedes-benz of beaumont (1865 I-10 s, beaumont, TX 77701), where it was test-driven, and the dealer became aware that the brake pedal was extremely firm. The dealer diagnosed the vehicle and determined that the vacuum pump needed to be replaced. The part was replaced; however, the failure persisted. The contact stated that the failure increased, causing the contact to engage the parking brake to stop the vehicle. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 96,826.

On 8/26/14 I was stopped at a light. When I went to take-off, the car would not accelerate. It finally did but very slowly. This occurred two more time at the next two stop lights. I was then in a center turn lane to turn across three lanes of traffic & when I tried to accelerate, the car died and the electronic display gave a yellow error message that the car was inoperable due to an issue with the braking system. I immediately put the car in park, turned it off & then started it back up. Fortunately it re-started, the error message was gone & I was able to drive into my office parking lot. My mercedes service dept. Said no codes registered on the computer, probably because I turned the car off so quickly it didn't have time to. Today, 8/17/14, I am having the same issue. My car is back at the mercedes service department. This is, in my opinion, a dangerous & life threatening problem.

Takata recall, not action taken in a eficcient time brakes 2017 elec stability control 2013 and 2017.