etc.) “CGI” (Charged Gasoline Injection) indicates direct gasoline injection . “CDI” (Common-rail Direct Injection) indicates a common-rail diesel engine. “Hybrid” indicates a gasoline- or diesel-electric hybrid . “NGT” indicates a natural gas-fueled engine. “Kompressor” indicates a supercharged engine. “Turbo” indicates a turbocharged engine, only used on A-, B-,?- and GLK-Class models.