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The Mercedes-AMG M156 engine was a 6.2-liter V8 petrol engine with no components in common with other Mercedes-Benz V8 engines.Mercedes-AMG in Affalterbach, Germany, constructed the M156 engine by hand before it was first used in the w211 e 63 AMG

The M156 engine had a 6208 cc displacement with a 102.2 mm bore and 94.6 mm stroke. Despite its capacity, the engine was branded as “6.3” to honor the Mercedes-Benz M100 engine, which had a 6.3-litre displacement at its inception. The high-strength aluminum-silicon alloy (AlSi7) block of the M156 engine was notable for being built with a robust bedplate at the main bearings, cast-in steel reinforcements, and a closed-deck configuration next to the aluminum-silicon alloy (AlSi17) cylinder head.

Other features of the M156 engine included the following: a Cromax 42CrMo4V forged steel alloy crankshaft, fracture-split forged connecting rods, twin-wire arc sprayed (TWAS) coating on the cylinder bores, a Bosch 9.7 engine management system, double overhead camshafts per cylinder bank (intake cams driven by a double chain from the crankshaft and small gears on the intake cams drive the exhaust camshafts

The E-Class (model series 211)’s E-Class 63 AMG was the first vehicle to use the engine, and later, additional vehicles. The SL facelift was the most recent vehicle to use the new engine. It took the place of the M 113 series’ V8 supercharged engine, as with most series. All four camshafts in the engine can be adjusted steplessly in phase.

The M156 engine was the first engine with cylinder liners covered with electric arc spraying when Mercedes-AMG GmbH unveiled it in July 2005. (LDS). When compared to gray cast iron bushes, Mercedes’ NANOSLIDE® technology dramatically minimizes friction losses.

The M 156 produces, depending on the model type, based on its 6208 cc capacity.

The M156 engine features a 6208 cc engine and can generate 336 to 386 kW of output, depending on the model variation (457 to 525 hp). The 38th week of 2008 saw the construction of the 40,000th M156 engine. AMG also adheres to the tenet of “one man, one engine,” which states that a single AMG employee is responsible for the whole assembly of an engine. The engine is given a label bearing the name of the corresponding mechanic at the conclusion of the manufacturing process.

The M156 engine pplications:

2006 E 63 AMG
2006 ML 63 AMG
2006 R 63 AMG
2006 S 63 AMG
2006 CL 63 AMG
2007 CLK 63 AMG
CLS 63 AMG from 2007
SL 63 AMG 2008 C 63 AMG

The m278 engine is a descendant of the company’s earlier M273 V8 engine, which also had an aluminum engine block and low-friction Silitec aluminum \silicon cylinder liners. As opposed to the port-injected M273, the m278 engine has gasoline direct injection, piezoelectric fuel injectors for more exact fuel delivery, and multi-spark ignition, which allows the spark plugs to be fired more frequently throughout the combustion sequence for more efficient combustion.  Other differences from the M273 include a wider range of adjustment for the variable valve timing system, a new timing chain configuration, and improved engine accessories (such the alternator, water pump, fuel pump, and oil pump) that lessen parasitic loads.