The M156 is the first automobile V8 engine designed autonomously by Mercedes-Benz subsidiary Mercedes-AMG, as previous AMG engines have always been based on original Mercedes engines. The engine was designed to be a naturally aspirated racing unit, and is also used in a number of high-performance AMG-badged Mercedes-Benz models.

Mercedes-Benz M156 engine
Overview
Manufacturer	Mercedes-AMG
Layout
Configuration	Naturally aspirated 90° V8
Displacement	6.2 L (6,208 cc)
Cylinder bore	102.2 mm (4.02 in)
Piston stroke	94.6 mm (3.72 in)
Valvetrain	DOHC 4 valves x cyl.
Compression ratio	11.3:1
RPM range
Redline	7,250-8,000
Combustion
Fuel system	Fuel injection
Fuel type	Gasoline
Oil system	M156: Wet sump M159: Dry sump
Cooling system	Water-cooled
Output
Power output	451–622 hp (457–631 PS; 336–464 kW)
Torque output	630–650 N⋅m (465–479 lb⋅ft)
Chronology
Predecessor	Mercedes-Benz M113 engine
Successor	Mercedes-Benz M157 engine (5.5L) Mercedes-Benz M176/M177/M178 engine (4.0L)

M156

The M156 displaces 6,208 cc (6.2 L; 378.8 cu in) and shares very little with other Mercedes-Benz engine families like the M155. The bore spacing, block design, and other features are unique to the AMG engine.

Although this engine displaces 6.2 litres, it is marketed as the "6.3" to commemorate Mercedes' famed 6.3 L M100 engine, its first production V8.

The engine uses a bore and stroke of 102.2 mm × 94.6 mm (4.02 in × 3.72 in). When introduced in the 2007 CLK63 AMG, output was 475 hp (482 PS; 354 kW) at 6,800 rpm with 630 N⋅m (465 lb⋅ft) of torque at 5,200 rpm. For the 2007 CLS63 and E63, output was 507 hp (514 PS; 378 kW) at 6,800 rpm with 630 N⋅m (465 lb⋅ft) of torque at 5,200 rpm. The 2007 ML63 had 503 hp (510 PS; 375 kW), and the 2008 C63 had 451 hp (457 PS; 336 kW). The final 2015 C63 had 500 hp (507 PS; 373 kW).

The engine, however, has been uprated to produce 518 hp (525 PS; 386 kW) and 465 lb⋅ft (630 N⋅m) of torque in the late S 63, E 63, SL 63, CLS 63 & CL 63 models.

Applications:

• 2006-2011 E 63 AMG
• 2006-2011 ML 63 AMG
• 2006 R 63 AMG
• 2006-2011 S 63 AMG
• 2006-2011 CL 63 AMG
• 2006-2010 CLK 63 AMG
• 2006-2010 CLS 63 AMG
• 2008-2015 C 63 AMG
• 2008-2011 SL 63 AMG
• 2013 Lucra LC470 R

M156 lawsuit

In 2011, a class action lawsuit was filed in United States District Court in New Jersey against Daimler AG, Mercedes-Benz, Mercedes-AMG for alleged defects in the M156 engine contained in AMG vehicles built in 2007–2011 model years leading to premature wear. The plaintiff claimed the combination of cast nodular iron camshafts and 9310 grade steel valve lifters contributed to the premature wear, but the defendants had known about the defect since 2007.[1]

The lawsuit lasted approximately 14-months. In November, 2012, litigation came to a halt when the New Jersey District Court dismissed the plaintiffs’ first amended complaint for lack of standing. The plaintiffs were given the opportunity to further amend their complaint to show that they had standing to sue, but plaintiffs made no further filings with the Court. On January 7, 2013, the Court signed an order closing the case. [2]

M159

The M159 is a version used in Mercedes-Benz SLS AMG and current AMG GT3 racecar. Compared to the standard AMG engine, the SLS's engine includes an all-new intake system, reworked valvetrain and camshafts, the use of flow-optimised tubular steel headers and dethrottling of the exhaust system. The engine also utilizes a dry-sump lubrication system to lower the center of gravity of the car.[3]

See also

• List of Mercedes-Benz engines

References

General

• "New AMG 6.3 Liter V8 Engine -In Detail". GermanCarFans. Retrieved January 16, 2006.

External links

• Engine and power transfer: Exclusive, high-performance eight-cylinder front-mid-engine and double-declutch transmission in a transaxle arrangement contains info on M159 engine

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