The M133 is a

turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

inline-four engine A straight-four engine (also called an inline-four) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The vast majority of automotive four-cylinder engines use a straight-four layout (with the ...

produced by

Mercedes-Benz Mercedes-Benz (), commonly referred to as Mercedes and sometimes as Benz, is a German luxury and commercial vehicle automotive brand established in 1926. Mercedes-Benz AG (a Mercedes-Benz Group subsidiary established in 2019) is headquartere ...

. Since its debut in 2013, it has been awarded

International Engine of the Year The International Engine of the Year is an annual competition for automotive industry internal combustion engines and electric motors, judged by a panel of automobile journalists from around the world. It is organised by UKi Media & Events' Automot ...

three times in the "Best New Engine" and "1.8-litre to 2-litre" categories.

Design

The M133 is based on the

M270 The M270 Multiple Launch Rocket System (M270 MLRS) is an American-developed armored, self-propelled, multiple rocket launcher. The U.S. Army variant of the MLRS vehicle is based on the chassis of the Bradley Fighting Vehicle. The first M270s we ...

engine but has been extensively revised by AMG. It features a twin-scroll turbocharger, BlueDIRECT direct injection, iron-carbon alloy on the cylinder walls to reduce friction, and

zircon Zircon () is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium. Its chemical name is zirconium(IV) silicate, and its corresponding chemical formula is Zr SiO4. An empirical formula showing some of the r ...

in the cylinder heads to increase thermal conductivity. The cooling system is also based on the one found in the

Mercedes-Benz SLS AMG The Mercedes-Benz SLS AMG (C197 / R197) is a front mid-engine, 2-seater, limited production grand tourer developed by the Mercedes-AMG division of German automotive manufacturer Mercedes-Benz, with the assistance of David Coulthard. The car is ...

. The M133 was updated in 2015, and features performance improvements of and .

Models

M133 DE20 LA (265 kW version)

* 2013–2015 C117 CLA45 AMG * 2013–2015 W176 A45 AMG * 2014–2015 X156 GLA45 AMG

M133 DE20 LA (280 kW version)

* 2015–2018 C117 CLA45 AMG * 2015–2018 W176 A45 AMG * 2015–2019 X156 GLA45 AMG

References

{{reflist, 30em Mercedes-Benz engines Straight-four engines Gasoline engines by model