AMG models will eventually return (including with a V8 for the C 63 in place of the unloved and fiendishly complex four-cylinder plug-in hybrid), but for now, the lone C-Class offering is the C 300.
At first glance, it might seem like nothing has changed under the hood. It still has a 2.0-liter turbocharged four-cylinder engine with a 48-volt mild-hybrid system featuring an electric motor that contributes a dollop of power when accelerating, smooths out the auto stop/start system, and increases fuel efficiency. Output is even the same, at 255 horsepower and 295 pound-feet of torque. Ditto the fuel economy, with an EPA-estimated 29 mpg combined with rear-wheel drive (RWD) and 27 mpg combined with all-wheel drive (AWD).
The engine features a new electric supercharger that enhances engine response by “filling in the gaps,” so to speak, in the car’s power delivery. Basically, there’s less lag between the driver putting their foot down and the engine responding. Indeed, engine response was excellent, and the electric unit removes one of the main downsides of the turbocharged four-cylinder engines that have become so common in the automotive market. This is a tangible improvement, even an advantage, that won’t show up on a spec sheet.
Mercedes also made substantial updates to decrease cabin noise. This includes aerodynamic tweaks, an extra windshield seal, a vibration-reducing exhaust update, and other acoustic changes. It’s hard to say how much of a difference it makes without driving the 2027 model back-to-back with a 2026. That said, this test drive occurred in Germany and multiple Autobahn stints of 100 mph showed that the 2027 C-Class does an impressive job of quelling wind noise. It also felt mighty stable at such high speeds, too, so drivers should be A-OK doing 70 on the Interstate.
Changes were also made to the suspension, including the adaptive dampers, to sharpen handling. This might be a less successful enhancement, because the steering has an atypical-for-Mercedes artificial feel to it, with a mild elastic band quality to it when turning off center. So, even if the suspension is theoretically sportier, the steering ensures that the overall driving experience doesn’t actually feel that sporty (even in Sport mode, which just tightens the steering’s metaphorical elastic band).
We also have reservations about the ride quality. Germany has exquisite roads, so we didn't encounter many bumps during the test drive. Those that managed to sneak through the German ministry of road repair, however, gave us a sneaking suspicion that the 2027 C-Class may be a touch too firm for American roads and tastes, although only time and a full stateside test drive will confirm or refute this suspicion.