4-Cylinder Turbocharge Gas Engine. A turbocharged 2.0 liter 4-cylinder gasoline engine with Bosch Injection and. 258 lb-ft of torque is now available on selected Mercedes-Benz models.*. Its peak torque comes in just above an idle, for efficient starts from a standing stop. HORSEPOWER @ RPM: 188 hp @ 5,000 rpm. TORQUE: 258 lb-ft @ 2,500–3,500 rpm.