Mercedes-Benz M273 engine

TheMercedes-BenzM273engine is aV8automobilepiston enginefamily used in the 2000s (decade). It was based on the similarM272V6introduced in 2004.

Mercedes-Benz M273
Overview
Manufacturer	Mercedes-Benz
Production	2005–2013
Layout
Configuration	Naturally aspirated90°V8
Displacement	4.7 L (4,663 cc) 5.5 L (5,461 cc)
Cylinder bore	92.9 mm (3.66 in) 98 mm (3.86 in)
Piston stroke	86 mm (3.39 in) 90.5 mm (3.56 in)
Cylinder blockmaterial	Aluminium
Cylinder headmaterial	Aluminium
Valvetrain	DOHC4 valves x cyl.and continuousVVT
Combustion
Fuelsystem	Sequential port injection
Fuel type	Gasoline
Cooling system	Water cooled
Output
Power output	250–285 kW (340–387 PS; 335–382 hp)
Torque output	460–530 N⋅m (339–391 lb⋅ft)
Chronology
Predecessor	Mercedes-Benz M113
Successor	Mercedes-Benz M278

An evolution of theM113V8,all M273s have aluminium engine blocks,sequential port fuel injection,fracture-splitforgedsteelconnecting rods,a one-piece castcrankshaft,and a magnesiumintake manifold.The cylinders are lined with silicon/aluminium, and a dual-lengthvariable-length intake manifoldis fitted.

In addition to this, new features shared with theM272includeDOHCaluminium cylinder heads,4 valves per cylinderand independent continuouslyvariable valve timingon 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.

E47

TheE47is a 4.7 L (4,663 cc) version. Bore and stroke is 92.9 mm × 86 mm (3.66 in × 3.39 in). Output is 250 kW (340 PS; 335 hp) at 6000 rpm with 460 N⋅m (339 lb⋅ft) of torque at 2700–5000 rpm.

Applications:

• 2007–2012GL 450 (X164)
• 2007–2013S 450 (W221)

E55

TheE55is a 5.5 L (5,461 cc) version. Bore and stroke increased to 98 mm × 90.5 mm (3.86 in × 3.56 in). Output is 285 kW (387 PS; 382 hp) at 6000 rpm with 530 N⋅m (391 lb⋅ft) of torque at 2800–4800 rpm.

Applications:

• 2006–2009E 500 / E 550 (W211)
• 2009–2011E 500 / E 550 (W212)
• 2006–2010CL 500 / CL 550 (C216)
• 2006–2010CLS 500 / CLS 550 (C219)
• 2006–2012GL 500 / GL 550 (X164)
• 2008–2011ML 500 / ML 550 (W164)
• 2005–2011S 500 / S 550 (W221)
• 2006–2012SL 500 / SL 550 (R230)
• 2006–2009CLK 500 / CLK 550 (C209)
• 2006–2015G 500 / G 550 (W463)
• 2007–2014R 500 / R 550 (W251)
• 2010–presentKSU Gazal-1

*Note: 500 or 550 model naming varies depending on geographical market.

See also

• Mercedes-Benz M152 engineandMercedes-Benz M156 enginefor AMG offerings for the similar generation
• List of Mercedes-Benz engines