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.
| Exact capacity | 4663 cm³ |
| Power system | CGI direct injection. |
| Engine power | 367 - 408 HP |
| Torque | 550 - 600 nm |
| Engine block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder diameter | 92.9 mm |
| Piston stroke. | 86 mm |
| Compression ratio | 10.5 |
| Engine features | Bi-Turbo |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | on intake and exhaust. |
| Turbocharging | two Garrett MGT1752SM |
| What oils to use | 8.5 liters 0W-40 |
| Fuel type | 98 |
| Environmental class | EURO 5/6 |
| Approximate life expectancy | 300 000 HP |
| Exact capacity | 4663 cm³ |
| Power system | CGI direct injection. |
| Engine power | 435 - 455 HP |
| Torque | 700 nm |
| Engine block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder diameter | 92.9 mm |
| Piston stroke. | 86 mm |
| Compression ratio | 10.5 |
| Engine features | Bi-Turbo |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | on intake and exhaust. |
| Turbocharging | two Garrett MGT1752SM |
| What oils to use | 8.5 liters 0W-40 |
| Fuel type | 98 |
| Environmental class | EURO 5/6 |
| Approximate life expectancy | 300 000 HP |
| City | 12.5 litry |
| Route | 6.9 litry |
| Mixed | 9.0 litry |
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.
| CL-Class C216 | 2010 - 2014 |
| CL-Class C217 | 2014 - 2017 |
| CLS-Class W218 | 2011 - 2018 |
| E-Class W212 | 2011 - 2016 |
| ML-Class W166 | 2012 - 2015 |
| GLE-Class W166 | 2015 - 2018 |
| GL-Class X166 | 2012 - 2015 |
| GLS-Class X166 | 2015 - 2019 |
| S-Class W221 | 2011 - 2013 |
| S-Class W222 | 2013 - 2017 |
| SL-Class R231 | 2012 - 2020 |
Mercedes M270 gasoline engines with a capacity of 1.6 and 2.0 liters were produced from 2011 to 2019 and were installed in models with transversely mounted engines, such as the A-Class and B-Class. Similar power units for vehicles with longitudinally mounted engines are designated M274. R4 Series: M102, M111, M166, M260, M264, M266, M271, and M282.
The 1.4-liter turbocharged petrol engine Mercedes M282 has been produced by the company since 2018 and is practically installed in all front-wheel drive models: A-Class, B-Class, CLA, GLA, and GLB. This engine was developed in collaboration with the Renault group and is also known under the index H5Ht. R4 series: M102, M111, M166, M260, M264, M266, M270, M271, and M274.
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.
The 3.0-liter inline 6-cylinder engine of the Mercedes M256 has been installed by the company since 2017 and used in their most powerful and expensive models, such as the S-Class, GLS-Class, and AMG GT. There is a version of this engine with a single turbocharger and an additional electric compressor. The R6 engine lineup also includes the M103 and M104 engines.
1.4-liter Opel engine Z14XEP or LJ2 was produced in Austria from 2003 to 2010 and installed in many compact models of the company, such as Astra, Corsa, Combo, and Meriva. This engine is one of the most popular small engines with low displacement and Twinport system. The Z10 series also includes engines: Z10XE, Z10XEP, Z12XE, Z12XEP, and Z14XE.
The 2.0-liter Mazda RF7J diesel engine was produced by the company from 2005 to 2010 and installed in European versions of popular third, fifth, or sixth series models. This engine was essentially a modernized version of the well-known RF5C diesel engine. The MZR-CD lineup also includes the RF5C and R2AA engines.