Mercedes M278 engine

The 4.6-liter V8 engine from Mercedes, the M278, with dual turbocharging, was introduced in 2010 as a replacement for the well-known M273 engine, which was installed in popular E-Class, S-Class, and GL models. The DE 46 power unit is available in only one capacity, but in various power variants. The V8 engine lineup also includes the following units: M119, M113, M157, and M273.

Technical specifications of Mercedes M 278 4.6-liter engine. M 278 DE 46 AL red

Modification: M 278 DE 46 AL red
Exact capacity4663 cm³
Power systemCGI direct injection.
Engine power367 - 408 HP
Torque550 - 600 nm
Engine blockaluminum V8
Block headaluminum 32v
Cylinder diameter92.9 mm
Piston stroke.86 mm
Compression ratio10.5
Engine featuresBi-Turbo
Hydraulic compensator. tak
Timing drivechain
Timing phase adjusteron intake and exhaust.
Turbochargingtwo Garrett MGT1752SM
What oils to use8.5 liters 0W-40
Fuel type98
Environmental classEURO 5/6
Approximate life expectancy300 000 HP
Modification: M 278 DE 46 AL
Exact capacity4663 cm³
Power systemCGI direct injection.
Engine power435 - 455 HP
Torque700 nm
Engine blockaluminum V8
Block headaluminum 32v
Cylinder diameter92.9 mm
Piston stroke.86 mm
Compression ratio10.5
Engine featuresBi-Turbo
Hydraulic compensator. tak
Timing drivechain
Timing phase adjusteron intake and exhaust.
Turbochargingtwo Garrett MGT1752SM
What oils to use8.5 liters 0W-40
Fuel type98
Environmental classEURO 5/6
Approximate life expectancy300 000 HP

Fuel consumption Mercedes M278 engine

Using the example of the 2012 Mercedes CLS 500 with an automatic gearbox:
City12.5 litry
Route6.9 litry
Mixed9.0 litry

Engine Overview and Common Failures

The weight of the M278 engine according to the catalog is 220 kg. The M278 engine number is located at the junction of the block with the gearbox. Due to the design feature, the chain tensioners of the timing mechanism quickly fail. If you ignore the knocking, the entire timing mechanism will have to be replaced along with the phase regulators. The oil pump has low reliability, which leads to scuffing and overhaul. The aluminum-silicon coating of the cylinder walls cannot tolerate detonation, and the engine is prone to it. Piezoceramic injectors are sensitive to overheating and rarely last even up to 100,000 km.

Engine Mercedes M278

Mercedes
CL-Class C2162010 - 2014
CL-Class C2172014 - 2017
CLS-Class W2182011 - 2018
E-Class W2122011 - 2016
ML-Class W1662012 - 2015
GLE-Class W1662015 - 2018
GL-Class X1662012 - 2015
GLS-Class X1662015 - 2019
S-Class W2212011 - 2013
S-Class W2222013 - 2017
SL-Class R2312012 - 2020

Engines from the same line as Mercedes M278 engine

See Also

Mercedes M254 Engine

Mercedes M254 engines with capacities of 1.5 and 2.0 liters were introduced for the first time in 2020 and are characterized by plasma-sprayed iron with a Nanoslide coating and an integrated starter-generator (ISG). Currently, these power units are only installed in the fifth generation of the popular C-Class model. R4 series: M166, M260, M264, M266, M270, M271, M274, and M282.

Mercedes M103 Engine

The family of inline six-cylinder engines, Mercedes M103, was produced from 1985 to 1993 and was installed in many models of the company, such as W201, W124, and luxury roadsters R107. There were two different versions of the engine: E26 with a capacity of 2.6 liters and E30 with a capacity of 3.0 liters. The inline six-cylinder engine lineup also includes units: M104 and M256.

Mercedes M276 engine

The V6 engine series with a displacement of 3.0 and 3.5 liters, the Mercedes M276, was introduced in 2010 and has since been installed in most of the company's modern models, such as the W205 and W222. There are three variants of this engine: naturally aspirated and two with turbocharging. The V6 engine line also includes the engines: M112 and M272.

Mercedes M113 engine

The V8 engine series Mercedes M113 with a capacity of 4.3 and 5.0 liters was produced from 1997 to 2008 and installed in the largest and most expensive cars of the company, such as models W211, W219, W220, and W251. There was also a more powerful version of the engine with a capacity of 5.4 liters for AMG models. The V8 engine lineup also includes: M119, M157, M273, and M278.

VW BMM engine

The 2.0-liter, 8-valve Volkswagen BMM 2.0 TDI engine was produced from 2004 to 2010 and installed in many models of the group with a transverse drive system. This diesel engine is known for its temperamental piezoelectric injectors. The following engines belong to the EA188-2.0 line: BKD, BKP, BMP, BMR, BPW, BRE, and BRT.

Nissan Engine Kr20ddet

The 2.0-liter Nissan KR20DDET or 2.0 VC-Turbo engine has been produced in Japan since 2017 and is installed in the Altima sedans, but it is most well-known for the Infiniti QX50, QX55, and QX60 crossovers. This powertrain stands out due to the presence of the proprietary compression ratio control system. The KR family also includes the KR15DDT engine.