|Manufacturer||DaimlerChrysler; Daimler AG|
|Configuration||Naturally aspirated 90° 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)
|Valvetrain||DOHC 4 valves x cyl. and continuous VVT|
|Fuel system||Sequential fuel injection|
|Cooling system||Water cooled|
|Power output||250–285 kW (340–387 PS; 335–382 hp)|
|Torque output||460–530 N⋅m (339–391 lb⋅ft)|
An evolution of the M113 V8, all M273s have aluminum engine blocks, sequential 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.
The E47 is 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.
The E55 is 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.
- 2006–2011 E500/E550
- 2006–2010 CL500/CL550
- 2006–2017 CLS500/CLS550
- 2006– GL500/GL550
- 2008-2019 ML500/ML550
- 2006–2009 S500/S550
- 2006–2009 CLK500/CLK550
*Note: 500 or 550 model naming varies depending on geographical market.
- "Mercedes-Benz M273 engine". australiancar.reviews. Retrieved 2018-06-17.