2023 Mercedes-Benz C-Class Reliability Score & Common Problems

Owners of the 2023 Mercedes-Benz C-Class frequently report issues with the service brakes, particularly involving unexpected activation of the Automatic Emergency Braking (AEB) system. Complaints often mention the car braking abruptly without cause, sometimes at highway speeds, and describe incidents where the system fails to engage when expected, leading to rear-end collisions. Symptoms include no warning lights or alerts before these events, and some owners experience these issues as early as 2,000 to 6,000 miles. Two reported crashes, one involving an injury, highlight potential safety implications. Buyers should be aware of these reported braking inconsistencies and the potential for unexpected vehicle behavior.

Owners of the 2023 Mercedes-Benz C-Class frequently report engine stalling issues, with the engine shutting off unexpectedly while the vehicle is in motion or at a stop. Symptoms often include the appearance of a "malfunction" message on the dashboard, and in some cases, the engine fails to restart without multiple attempts. Complaints typically occur at low mileages, with some vehicles experiencing issues as early as 300 miles. These stalling incidents pose potential safety risks, as vehicles may stall in traffic, leading to possible rear-end collisions or traffic obstructions. Additionally, some owners report check engine lights and oil leaks, with issues persisting even after dealership visits and software updates.

Owners report several structural issues with the 2023 Mercedes-Benz C-Class, primarily involving the sunroof and rear hatch. Complaints frequently mention the panoramic sunroof shattering unexpectedly while driving, with no external impact, posing potential safety risks due to falling glass. Additionally, multiple owners describe problems with the rear hatch opening unintentionally when the vehicle is unattended, creating security and safety concerns. These issues often appear early in the vehicle's life, with some occurring within the first few thousand miles. One incident involving the tailgate resulted in an injury when it closed unexpectedly, striking an individual on the head. These patterns suggest potential risks for buyers to consider when evaluating this model.

Owners of the 2023 Mercedes-Benz C-Class frequently report issues with the Forward Collision Avoidance system, particularly involving unexpected braking events. Common symptoms include phantom braking, where the vehicle abruptly stops or decelerates without any apparent hazard, and failure to activate the system when needed, as seen in one reported crash. These issues occur at various mileages, with some incidents happening as early as 1,000 miles. Safety implications are significant, with reports of loss of control and near-collisions due to sudden braking. Buyers should be aware of these potential issues, particularly if the vehicle has advanced driver assistance features like Adaptive Cruise Control or Active Speed Limit Assist.

Owners of the 2023 Mercedes-Benz C-Class report issues related to the fuel system, with common symptoms including vehicles shutting off unexpectedly, difficulty starting, and the presence of fuel odors. Complaints frequently mention that these issues occur at various mileages, ranging from as low as 600 to about 28,000 miles. Many owners express frustration over the unavailability of parts required for recall repairs, which are linked to these symptoms. Safety implications are noted, as several owners describe vehicles stalling while driving, potentially leading to hazardous situations. This information is crucial for potential buyers to consider, especially if purchasing a vehicle impacted by these issues.

Owners of the 2023 Mercedes-Benz C-Class report issues primarily related to steering and safety system malfunctions. Multiple complaints describe incidents where the steering wheel locks or safety systems like adaptive cruise and lane keeping assist fail, sometimes resulting in crashes. One owner mentions the steering wheel locking during a turn, leading to a collision, while others report warning lights and system shutdowns that disable crucial safety features. These issues often occur in vehicles that are relatively new, with one owner indicating the vehicle was only in use for about two months out of eight due to frequent repairs. The combination of steering lock-ups and malfunctions in adaptive safety systems poses significant safety risks, including loss of vehicle control and potential crashes.

Owners of the 2023 Mercedes-Benz C-Class report issues with airbag non-deployment during crashes. Complaints frequently mention that airbags fail to deploy despite significant impacts, as evidenced by two incidents involving crashes—one in snowy conditions and another at a stoplight—resulting in three injuries. In both cases, owners describe dashboard error messages indicating airbag failures, with one vehicle also showing seatbelt malfunction where the webbing bunched up instead of restraining the occupant. These reports involve vehicles approximately six months old, and the incidents highlight potential safety implications due to the lack of airbag deployment during collisions.