The Mercedes M273 engine is a powerful V8 engine that was produced by Mercedes-Benz from 2005 to 2014. It has a displacement of 5.5 liters and produces up to 382 horsepower and 391 lb-ft of torque. This engine is known for its smooth and refined performance, as well as its reliability and durability. If you're looking for a high-performance engine for your Mercedes or other vehicle, the M273 is definitely worth considering.