What is the engine model of the Mercedes-Benz W212?

[Cooper]

Mercedes-Benz W212 engine is a six-cylinder naturally aspirated engine. Number of cylinders: The number of cylinders in an engine refers to the cylinder count, with common configurations including: three-cylinder, four-cylinder, five-cylinder, six-cylinder, eight-cylinder, ten-cylinder, twelve-cylinder, and sixteen-cylinder. Engines with different displacements use varying numbers of cylinders. Specific classifications: Engines with 1 to 1.5 liters typically use three cylinders; 2.0-liter engines are four-cylinder; 2.5-liter engines are five-cylinder; approximately 3-liter engines are six-cylinder; around 4-liter engines are eight-cylinder; 5.2-liter engines are ten-cylinder; and engines above 5.5 liters use twelve cylinders. Common structure in passenger cars: Passenger cars typically adopt a four-valve-per-cylinder structure, with each cylinder having two intake valves and two exhaust valves. This four-valve-per-cylinder design significantly improves the engine's intake and exhaust efficiency.