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I am filing a safety complaint regarding my 2023 Mercedes-Benz AMG C43 4MATIC. The vehicle has approximately 23,000 miles. On multiple occasions, the vehicle has abruptly and violently applied the brakes and/or come to a near stop while I was driving on highways and side roads, even though there was nothing in front of me that should have triggered emergency braking. There was no vehicle, pedestrian, cyclist, object, or road hazard present that would justify this braking event. This is not normal braking behavior. The car essentially performs an uncommanded emergency stop or severe deceleration without warning. The force is strong enough to create a serious risk of being rear-ended by vehicles behind me. This has happened at highway speeds and on local roads, making the vehicle unsafe to operate. If a following driver is unable to react in time, this defect could easily cause a crash, injury, or death.  The problem appears related to the vehicleâs automatic emergency braking / Active Brake Assist / forward collision avoidance system and possibly other linked driver-assistance systems. The vehicle has already been serviced on two separate occasions for this exact issue, yet the problem has occurred again. Despite bringing the vehicle in for repair more than once, the defect remains unresolved. Because this dangerous unintended braking continues to happen, I cannot continue to drive the car safely with this issue unresolved. On April 1, 2025, I took the vehicle to Aristocrat Motors in Merriam, Kansas for the car slamming on the brakes and beeping when no one was around. The service center calibrated the augmented reality camera and performed a test drive. The invoice indicates that they were unable to duplicate the braking event during the test drive. They ran codes with SDS and found that the augmented reality camera was not calibrated correctly, so they performed a calibration. On December 31, 2025, I again took the vehicle to Aristocrat Motors in Merriam, Kansa

MERCEDES-BENZ AMG C43 2023 UNKNOWN OR OTHER

The contact owns a 2023 Mercedes-Benz C43 AMG. While driving into a parking lot at a very slow speed, the braking system suddenly activated, and the vehicle shut off. After restarting the vehicle, the messages "Rear Axle Malfunction", "Active Braking System Limited" and "Inoperative" were displayed. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure. The failure mileage was 5,600.

MERCEDES-BENZ AMG C43 2023 SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT

2023 Mercedes-Benz AMG C43 4matic — vehicle data sourced from FuelEconomy.gov.

Experience exhilarating performance with the 2023 Mercedes-Benz AMG C43 4MATIC, a certified hybrid vehicle boasting a powerful 408 hp engine and all-wheel drive. This sedan offers a combined 22 MPG, making it a compelling choice for those seeking both dynamism and efficiency.

	2017	2018	2019	2020	2021	2023	2024
Price	—	—	—	—	—	$57,700	$52,100
Engine Capacity	3L	3L	3L	3L	3L	2999 cc	2L
Fuel Type	Premium Gasoline	Premium Gasoline	Premium Gasoline	Premium Gasoline	Premium	Premium Gasoline	Premium
Transmission	Automatic 9-spd	Automatic 9-spd	Automatic 9-spd	Automatic 9-spd	Automatic 9-spd	9 speed automatic	Automatic 9-spd
Body Type	Compact Cars	Compact Cars	Compact Cars	Compact Cars	Compact Cars	Sedan	Compact Cars

Mercedes-Benz AMG C43 4matic (2023) Specifications