Mercedes-Benz M272 engine

Mercedes-Benz M272
Overview
ManufacturerMercedes-Benz
Production2004–2017
Layout
ConfigurationNaturally aspirated 90° V6
Displacement2.5 L (2,496 cc)
3.0 L (2,996 cc)
3.5 L (3,498 cc)
Cylinder bore88 mm (3.46 in)
92.9 mm (3.66 in)
Piston stroke68.4 mm (2.69 in)
82 mm (3.23 in)
86 mm (3.39 in)
Cylinder block materialAluminum
Cylinder head materialAluminum
ValvetrainDOHC 4 valves x cyl. with continuous VVT
Combustion
Fuel systemport injection or direct injection (CGI)
Fuel typeGasoline or E85 (M272 929)
Cooling systemWater cooled
Output
Power output204–316 PS (150–232 kW; 201–312 bhp)
Torque output245–365 N⋅m (181–269 lb⋅ft)
Chronology
PredecessorMercedes-Benz M112
SuccessorMercedes-Benz M276

The Mercedes-Benz M272 engine is an automobile piston V6 engine family used in the 2000s (decade). Introduced in 2004, it is based on the M112 V6 introduced in 1998.

All M272 engines have aluminum engine blocks with a 90° V-angle with silicon/aluminum lined cylinders. The aluminum DOHC cylinder heads have 4 valves per cylinder. All have forged steel connecting rods, one-piece cast crankshaft, iron-coated aluminum pistons and a magnesium intake manifold. Like the M112, a balance shaft is installed in the engine block between the cylinder banks to deal with vibrations in the 90 degree V6 design. This essentially eliminates first and second order moments. A dual-length Variable Length Intake Manifold is fitted to optimize engine flexibility.

Continuous VVT was adopted for the first time. Featured on both the intake and exhaust camshafts, each can be varied through a range of 40 degrees. The twin spark plug system was replaced by a regular single spark plug per cylinder. New electronic coolant flow control has replaced the mechanical thermostat for improved engine warm-up and optimum control of engine temperature. Also tumble flaps are used to improve output at low engine speeds.


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