Last year, Mercedes-Benz announced a new 3.0-liter inline-six engine range featuring a clever 48-volt hybrid system and electric turbochargers. Today, a four-cylinder version makes its debut in the 2018 E350 Coupe and Cabriolet. Like its bigger brother, this 2.0-liter four-cylinder sounds like an impressive engine.
Pictured above: the 2018 Mercedes-Benz E400 Coupe.
Dubbed M264, this four-cylinder makes 299 hp and 295 lb-ft of torque thanks to a single twin-scroll turbocharger and a 48-volt belt-driven electric starter-alternator. Dubbed EQ Boost, the mild-hybrid system provides an additional 13 horsepower and 111 lb-ft of torque when the internal-combustion engine is spinning at or below 2500 rpm.
This small electric motor also allows the gas engine to shut off when coasting, and start up again nearly instantly. It can also harvest up to 12 kW of energy via regenerative deceleration, and uses an electric water pump to reduce parasitic engine losses.
According to Mercedes, this engine propels the E350 Coupe from 0-62 mph in 5.9 seconds, while the heavier Cabriolet is 0.2 seconds slower. The M264 will come paired with Mercedes' excellent 9G-Tronic nine-speed automatic gearbox.
Unfortunately, a Mercedes spokesperson told us that this engine won't be available on the US-spec E-Classes, though it hasn't been ruled out for future North American models.