The midsize Mercedes-Benz C-Class sedan is both safe and stylish. It gets the IIHS’ top rating when equipped with the optional LED reflector headlights with an auto high-beam function that are offered as part of the Adaptive High Beam Assist Package. The standard LED headlights and those included with the Exterior Lighting Package are deemed just Acceptable. Both the C-Class’ standard Active Brake Assist system and optional Active Brake Assist with Cross-Traffic Function (included in the Driver Assistance Package) are rated Superior.