The CLA comes in two strengths: low and extreme. The CLA250 4Matic we tested comes with a 2.0-liter turbocharged inline four that makes 208 horsepower and 258 pound-feet of torque. It’s a front-wheel-drive car, like the GLA crossover this chassis is based upon, with optional 4Matic all-wheel drive. Either configuration sends power through a 7-speed dual-clutch automatic. This is the lowest-rated engine in the Mercedes lineup, and acceleration can be described only as decent. Shifts, however, are among the quickest of Mercedes' models, with the kind of crisp downshifting you’d expect in a manual (which, at its core, is how a dual-clutch transmission works). Our only gripe: It’s not very smooth in regular driving. You can always feel the gears change, which is exactly the opposite of how traditional Mercedes automatics work.
There’s enough thrust for driving around town, though this engine peters out quickly even with the Dynamic Select button engaged in Sport. That system modifies the throttle, transmission, steering, and suspension settings so you can find an appropriate level of aggression no matter how you feel each morning. Under acceleration, the CLA is obstinately loud and groaning. So is the AMG CLA45, except that car’s engine does so deliberately. With 375 horsepower, 350 pound-feet of torque, and an optional sport exhaust, the CLA45 rips and snorts its way through traffic; the high turbo boost presses your neck permanently against that pretty seat. There is a way to unlock more power from the CLA250’s engine: You must purchase the pricier C300.
Despite all that, the CLA250 shines in the turns. Steering feel is light yet faster to react than most Mercedes models. The suspension keeps this short-wheelbase car tucked and balanced, with none of the understeer (the tendency of a car, at its limit, to plow toward the outside of a curve) you feel in most front-wheel-drive cars. It’s a little too stiff at times, especially with the run-flat tires and our car’s optional adjustable dampers, yet on a back road this little Benz can hold its own against faster sports sedans. Brake performance and pedal feel are exemplary in their confidence and stopping power. At higher speeds, the CLA is every bit the German car—poised and locked, dead straight.
The CLA250 4Matic is EPA-rated at 23 mpg city/32 highway, while the front-wheel-drive version rates 24/36. We averaged 25 mpg over 545 miles, most of them on the highway. Larger, heavier cars with bigger engines have performed equally well or better in our testing.