https://plaincars.com/make/mercedes-benz-c300 New NHTSA complaints and recalls filed for the Mercedes-Benz C300. en-us Mon, 21 Sep 2026 13:43:17 GMT https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#recall-26V481000-mercedes-benz-mercedes-benz-c-300-2023 Fri, 24 Jul 2026 00:00:00 GMT Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 CLA, 2019-2022 A-Class, 2022-2023 C-Class, 2024 CLE, 2020-2026 GLA/GLB, and 2023-2024 GLC vehicles. Please refer to MBUSA's recall report for specific model information. The micro-switch in the driver's door lock may corrode and fail to detect an open door, preventing the electronic parking brake or "Auto-Park" feature from engaging aut https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#recall-26V481000-mercedes-benz-mercedes-benz-c-300-2022 Fri, 24 Jul 2026 00:00:00 GMT Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 CLA, 2019-2022 A-Class, 2022-2023 C-Class, 2024 CLE, 2020-2026 GLA/GLB, and 2023-2024 GLC vehicles. Please refer to MBUSA's recall report for specific model information. The micro-switch in the driver's door lock may corrode and fail to detect an open door, preventing the electronic parking brake or "Auto-Park" feature from engaging aut https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2178660 Thu, 19 Feb 2026 00:00:00 GMT Spontaneous explosion of sunroof while car is in motion on the expressway 83 and could have caused an accident while my daughter was driving https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2177714 Tue, 17 Feb 2026 00:00:00 GMT I am reporting a catastrophic repeat engine failure on my 2020 Mercedes-Benz C300. On October 9, 2025, with 26,589 miles, the vehicle suffered a Cylinder 2 failure (exhaust valves), causing a dangerous loss of power in traffic. I paid $4,100.43 for a $10,000 plus cylinder head replacement at an authorized dealer (Mercedes-Benz of Atlanta South) on November 13, 2025. Following the repair, the vehic https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2176125 Thu, 12 Feb 2026 00:00:00 GMT The contact owns a 2010 Mercedes-Benz C300. The contact stated that the battery and alternator were being drained. The check engine warning light was illuminated. Additionally, the front air bag sensor message and a fog light message were displayed. The vehicle was towed to an unknown local dealer; however, the dealer was unable to determine the cause of the failure. The contact then reached out t https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2176126 Thu, 12 Feb 2026 00:00:00 GMT The contact owns a 2010 Mercedes-Benz C300. The contact stated that the battery and alternator were being drained. The check engine warning light was illuminated. Additionally, the front air bag sensor message and a fog light message were displayed. The vehicle was towed to an unknown local dealer; however, the dealer was unable to determine the cause of the failure. The contact then reached out t https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2176127 Thu, 12 Feb 2026 00:00:00 GMT The contact owns a 2010 Mercedes-Benz C300. The contact stated that the battery and alternator were being drained. The check engine warning light was illuminated. Additionally, the front air bag sensor message and a fog light message were displayed. The vehicle was towed to an unknown local dealer; however, the dealer was unable to determine the cause of the failure. The contact then reached out t https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2175289 Tue, 10 Feb 2026 00:00:00 GMT The contact owns a 2016 Mercedes-Benz C300. The contact stated that while driving approximately 20 MPH and turning the steering wheel to the right or the left, there was an abnormal clicking sound coming from the rear of the vehicle. There was no warning light illuminated. The contact had taken the vehicle to a local dealer where it was diagnosed and determined that the rear sub frame of the vehic https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2175181 Mon, 09 Feb 2026 00:00:00 GMT Strong fuel smell in cabin Can maybe cause a fire https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2175054 Mon, 09 Feb 2026 00:00:00 GMT Odometer Fraud. The contact purchased a 2019 Mercedes-Benz C300. The contact stated that after purchasing the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. The contact stated that at the time of purchase, the odometer reading was approximately 54,000 miles. At the time of registration, the mileage was approximately 54,000 miles, and the same mileag https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2171186 Thu, 29 Jan 2026 00:00:00 GMT fuel lines/ clamps defective causing a fuel leak. vehicle could catch on fire and fumes are extremely strong inside the cabin. issue confirmed by Mercedes dealer, mentioned there is an extended warranty up to 120,000 miles. rejected mine because i was at 120,300 miles. had to pay out of pocket. no warning lights or anything just the really strong smell of fuel and fuel range dropping. this is a ve https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2171187 Thu, 29 Jan 2026 00:00:00 GMT fuel lines/ clamps defective causing a fuel leak. vehicle could catch on fire and fumes are extremely strong inside the cabin. issue confirmed by Mercedes dealer, mentioned there is an extended warranty up to 120,000 miles. rejected mine because i was at 120,300 miles. had to pay out of pocket. no warning lights or anything just the really strong smell of fuel and fuel range dropping. this is a ve https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2168886 Thu, 22 Jan 2026 00:00:00 GMT While driving on highway, the engine light came on, a diagnostic test was performed by dealer, oil control valve defected) This could cause engine to lock up while driving, a serious safety concern. I contacted Mercedes Benz corporate office seeking help, because of factory defect. They're not assisting me with this extreme safety matter!! https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2169117 Thu, 22 Jan 2026 00:00:00 GMT I purchased this vehicle on December 26, 2025 from an authorized Mercedes-Benz dealership. Shortly after the purchase, I discovered an issue related to the airbag system, which indicates a potential safety defect. At the time of purchase and during the test drive, the vehicle was already turned on, and no warning or disclosure was provided regarding any airbag malfunction or warning message. The https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2167965 Tue, 20 Jan 2026 00:00:00 GMT Failed/Malfunctioned Component: Rear subframe (structural/chassis component) exhibited advanced corrosion (perforation/rust-through), compromising structural integrity and alignment/handling. Availability for Inspection: Yes. The vehicle and the subframe are available for inspection upon request. I can provide photos, videos, and repair estimates if needed. The corroded subframe is fracture and d https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2167966 Tue, 20 Jan 2026 00:00:00 GMT Failed/Malfunctioned Component: Rear subframe (structural/chassis component) exhibited advanced corrosion (perforation/rust-through), compromising structural integrity and alignment/handling. Availability for Inspection: Yes. The vehicle and the subframe are available for inspection upon request. I can provide photos, videos, and repair estimates if needed. The corroded subframe is fracture and d https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2168294 Tue, 20 Jan 2026 00:00:00 GMT I am reporting a safety defect involving the panoramic sunroof on my 2021Mercedes-Benz Coop vehicle. The panoramic sunroof has malfunctioned due to an apparent design or manufacturing defect. The sunroof fails to open / close and makes grinding or popping noises which malfunctioned unexpectedly. This issue occurred without misuse and during normal operation of the vehicle. The defect creates a s https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2167757 Mon, 19 Jan 2026 00:00:00 GMT Rear brakes backing plates rotted prematurely despite garage kept and well maintained status. While driving, noticed loud scraping and grinding noises from the rear left wheel. Took to mechanic and he found severe rust, with deep corrosion and flaking "rotted". He said I was lucky because this was very close to causing the entire brake assembly to fail, which would lead to serious braking problems https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2167758 Mon, 19 Jan 2026 00:00:00 GMT Rear brakes backing plates rotted prematurely despite garage kept and well maintained status. While driving, noticed loud scraping and grinding noises from the rear left wheel. Took to mechanic and he found severe rust, with deep corrosion and flaking "rotted". He said I was lucky because this was very close to causing the entire brake assembly to fail, which would lead to serious braking problems https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2165622 Mon, 12 Jan 2026 00:00:00 GMT Refer to Mercedes Complaint letter dated August 21, 2025. Refer to EDR report of the crash Mercedes Benz is claiming no responsibility for the failure of Active Brake Assist (ABA) during a frontal impact collision that resulted in the car total loss. The sensors also didn't work resulting in no alert to the driver and nothing recorded on the car camera system. https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2165623 Mon, 12 Jan 2026 00:00:00 GMT Refer to Mercedes Complaint letter dated August 21, 2025. Refer to EDR report of the crash Mercedes Benz is claiming no responsibility for the failure of Active Brake Assist (ABA) during a frontal impact collision that resulted in the car total loss. The sensors also didn't work resulting in no alert to the driver and nothing recorded on the car camera system. https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2165113 Sun, 11 Jan 2026 00:00:00 GMT points: ⸻ While driving, the vehicle displays the warning “Active Brake Assist Functions Limited – See Operator’s Manual.” The message appears during normal driving and does not go away. This warning indicates that the automatic emergency braking / Active Brake Assist system is limited or disabled, reducing a critical safety feature designed to help prevent or mitigate collisions. This creates https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2165114 Sun, 11 Jan 2026 00:00:00 GMT points: ⸻ While driving, the vehicle displays the warning “Active Brake Assist Functions Limited – See Operator’s Manual.” The message appears during normal driving and does not go away. This warning indicates that the automatic emergency braking / Active Brake Assist system is limited or disabled, reducing a critical safety feature designed to help prevent or mitigate collisions. This creates https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2165115 Sun, 11 Jan 2026 00:00:00 GMT points: ⸻ While driving, the vehicle displays the warning “Active Brake Assist Functions Limited – See Operator’s Manual.” The message appears during normal driving and does not go away. This warning indicates that the automatic emergency braking / Active Brake Assist system is limited or disabled, reducing a critical safety feature designed to help prevent or mitigate collisions. This creates https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2164662 Fri, 09 Jan 2026 00:00:00 GMT Check engine light comes on, Error Code P052E, after a lot of research, this is a known defective part by Benz. Huge safety issue not addressed by them. Very costly to fix for a customer. There is a new and improved replacement part from Benz indicating they are aware of the faulty old parts that are currently in those cars but yet they have failed to do a recall. https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2164422 Thu, 08 Jan 2026 00:00:00 GMT The car jerks so hard at times randomly that it feels like I got rear ended and it is completely unsafe. It also does small jerks at times. It's happened driving 70 mph down a highway, making a right turn accelerating slowly. Going slow down the street at 35, at a red light completely stopped or stop sign. There's no rhyme or reason to it. I've taken it to Mercedes five or six times now with the s https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2163353 Mon, 05 Jan 2026 00:00:00 GMT While driving at approximately 65 mph on the I-405 freeway in Irvine, CA during rainy conditions, my 2019 Mercedes-Benz C300 suddenly and completely lost acceleration without warning. At the same moment, a Check Engine Light illuminated on the dash. I was forced to coast across all lanes and stop in the emergency shoulder in a very unsafe area with high-speed traffic passing close by in low visib https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2163354 Mon, 05 Jan 2026 00:00:00 GMT While driving at approximately 65 mph on the I-405 freeway in Irvine, CA during rainy conditions, my 2019 Mercedes-Benz C300 suddenly and completely lost acceleration without warning. At the same moment, a Check Engine Light illuminated on the dash. I was forced to coast across all lanes and stop in the emergency shoulder in a very unsafe area with high-speed traffic passing close by in low visib https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2163355 Mon, 05 Jan 2026 00:00:00 GMT While driving at approximately 65 mph on the I-405 freeway in Irvine, CA during rainy conditions, my 2019 Mercedes-Benz C300 suddenly and completely lost acceleration without warning. At the same moment, a Check Engine Light illuminated on the dash. I was forced to coast across all lanes and stop in the emergency shoulder in a very unsafe area with high-speed traffic passing close by in low visib https://plaincars.com/make/mercedes-benz-c300 https://plaincars.com/make/mercedes-benz-c300#complaint-2162321 Fri, 02 Jan 2026 00:00:00 GMT The contact owns a 2016 Mercedes-Benz C300. The contact stated that whenever the fuel tank was full, there was a fuel-burning odor coming from the engine and entered the vehicle through the A/C vents. In addition, when the vehicle was cold, the odor was entering the vehicle through the A/C vents. No warning lights were illuminated. The vehicle was taken to a collision center specializing in foreig