Mercedes-Benz M156 engine


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.
The engine uses a bore and stroke of. When introduced in the 2007 CLK63 AMG, output was at 6,800 rpm with of torque at 5,200 rpm. For the 2007 CLS63 and E63, output was at 6,800 rpm with of torque at 5,200 rpm. The 2007 ML63 had, and the 2008 C63 had. The final 2015 C63 had.
The engine, however, has been uprated to produce and of torque in the late S 63, E 63, SL 63, CLS 63 & CL 63 models.
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.
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.

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.
Engine codeYearsPower outputTorqueRedline
M 1592010-2012 at 6,800 rpm at 4,750 rpm7,200 rpm
M 1592013-2015 at 6,800 rpm at 4,750 rpm7,200 rpm?
M 1592013-2014 at 7,400 rpm at 5,000 rpm8,000 rpm