Based on the current C-Class, the rounded GLC replaces the GLK. Larger dimensions improve rear-seat room, although it’s still a bit snug. Plush furnishings inside the quiet cabin prove appealing, although it also has Mercedes’ complex infotainment system. The 241-hp, 2.0-liter turbo four-cylinder delivers ample power and is matched to a nine-speed automatic. Unlike other nine-speeds we’ve tried, this one usually works well. The GLC rides comfortably and handles with athleticism. Automatic emergency braking is standard, but other safety gear, such as blind-spot monitoring and cross-traffic alert, comes in confusing options packages. Towing capability is high for the class, and air suspension is optional. A turbo V6 AMG GL43 goes on sale this fall. A coupelike SUV, the GLC Coupe, is also in the works. Note alert below.