All M271 engines are built in Untertürkheim, Germany. The family has a cast aluminum engine block and aluminum DOHC cylinder heads with 4 valves per cylinder and variable valve timing and a coil-on-plug ignition system.
The KE18ML is a 1.8 L (1796 cc) version. Bore is 82 mm and stroke is 85 mm. Output ranges from 122 PS (90 kW) at 5200 rpm to 192 PS (141 kW) at 5800rpm.
This engine had the same dimensions as E18ML and almost the same features, but used CGI (Stratified Charged Gasoline Injection) gasoline direct injection. It has been produced since 2003 in only one version, with an output of 170 PS (125 kW) at 5300 rpm. The production ceased in 2005.
The KE16 is a 1.6 L (1597 cc) version introduced in 2008. Bore is 82 mm and stroke is 75.6 mm. It shares the same features with the KE18ML version, like supercharger and multi-point injection. Output ranges from 129 PS (95 kW) at 5000 rpm to 156 PS (115 kW) at 5200 rpm.
This is the last version of M271 engine family. Dimensions are the same as E18ML and DE18ML, but the supercharger has been replaced with a turbocharger; like the DE18ML it uses the CGI (Stratified Charged Gasoline Injection) gasoline direct injection. Output ranges from 156 PS (115 kW) at 5200 rpm to 204 PS (150 kW) at 5500 rpm.
The engine in 2.0 litre naturally aspirated form is used by German automotive company HWA Team as the basis for a Mercedes-Benz motor racing engine and has been the engine used widely in Formula 3 motor racing powering championship winning drivers across Europe and further afield.