2021 Mercedes-Benz C-Class Safety Report

The 2021 Mercedes-Benz C-Class exhibits a mixed safety profile based on the limited available data. With only 13 total NHTSA complaints, and no reported crashes, fires, injuries, or deaths, the vehicle's overall incident rate appears low. However, the absence of official NHTSA safety ratings (Overall, Frontal, Side, Rollover) means its crashworthiness performance is unassessed by this agency. The most prominent concern emerging from the complaint data is related to the engine, accounting for 5 out of 13 complaints, often involving significant failures like cylinder head issues and sudden power loss, which can pose immediate safety risks. Common complaint patterns highlight critical engine defects, specifically cylinder head failures and issues with the M254/M264 engines, with multiple reports of these occurring at relatively low mileages (e.g., 35,000-44,000 miles). These engine problems have led to vehicles stalling or losing acceleration, creating hazardous driving conditions. Other reported issues include panoramic sunroof malfunctions, airbag deployment without impact, and rearview camera failures. The lack of any recalls for the 2021 C-Class, despite these recurring engine complaints, is noteworthy and suggests that Mercedes-Benz has not yet addressed these specific issues through a widespread safety campaign. While the low number of total complaints might suggest a generally safe vehicle, the severity of the reported engine failures and the potential for sudden loss of power or stalling are significant safety concerns. The absence of crash test data from NHTSA prevents a comprehensive evaluation of its occupant protection capabilities. Prospective buyers should be aware of the documented engine reliability issues and the potential for costly repairs, as well as the safety implications of sudden vehicle malfunctions.

Our recommendation: Given the significant, recurring engine issues and lack of NHTSA crash test ratings, prospective buyers should proceed with caution, thoroughly inspect service records, and consider an extended warranty to mitigate potential high repair costs for engine-related failures.