High Quality Content by WIKIPEDIA articles! The Mercedes-Benz M273 engine is a V8 automobile piston engine family used in the 2000s. It was based on the similar M272 V6 introduced in 2004. An evolution of the M113 V8, all M273s have aluminum engine blocks, SFI fuel injection, forged steel connecting rods, a one-piece cast camshaft, and a magnesium intake manifold. The cylinders are lined with silicon/aluminum, and a dual-length Variable Length Intake Manifold is fitted. In addition to this, new features shared with the M272 include DOHC aluminum cylinder heads, 4 valves per cylinder and independent continuously variable valve timing on both the intake and exhaust sides. A new electronically controlled cooling system has eliminated the need for a mechanical thermostat for improved engine warm-up and optimum control of engine temperature.

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