Comes as standard in the C200 and C250, Mercedes-Benz Charged Gasoline Injection (CGI) engines offer significant improvements in fuel economy and performance.
They are the world’s first petrol engines to harness the incredible precision of Piezo direct injection and spray-guided combustion – and the results speak for themselves. CGI engines consume 10% less fuel than conventionally injected units while delivering 4% more torque and an additional 20hp. The C200 CGI BlueEFFICIENCY generates 184 hp at 5250 rpm, rated torque of 270 Nm at 1800 - 4600 rpm, it takes 8.2 seconds to reach 100 km/h from standstill. In the mean while, the respective data for C250 CGI BlueEFFICIENCY are 204 hp at 5500 rpm, 310 Nm at 2000 – 4300 rpm, and 7.4 seconds. Both of them meet the EU5 emission standard.
The main advantage of the CGI engine is in the stratified operating mode from which it takes its name. During this mode the engine is run with high excess air and thus excellent fuel efficiency. Multiple injection extends this lean-burn operating mode to higher rpm and load ranges too. During each compression stroke, a series of injections takes place, spaced just fractions of a second apart. This improves mixture formation, combustion and fuel consumption.
A special feature distinguishes the third 4-cylinder petrol engine of the C-Class Saloon: thanks to less displacement in the engine, lower weight and improved aerodynamics, the fuel consumption and CO2 emissions for the car were significantly reduced. This is also due in part to tyres with lower rolling resistance.