4-cylinder Mercedes M266 engines with a displacement ranging from 1.5 to 2.0 liters were produced from 2004 to 2012 and were exclusively installed in the compact A-Class model and its compact van counterpart, the B-Class. These power units were essentially just updated versions of the popular M166 engines. R4 Series: M111, M260, M264, M270, M271, M274, and M282.
| Exact capacity | 1498 cm³ |
| Power system | injector |
| Engine power | 95 HP |
| Torque | 140 nm |
| Engine block | aluminum R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 83 mm |
| Piston stroke. | 69.2 mm |
| Compression ratio | 11 |
| Engine features | SOHC |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 5.0 liters 5W-30 |
| Fuel type | 95 |
| Environmental class | EURO 4/5 |
| Approximate life expectancy | 270 000 HP |
| Exact capacity | 1699 cm³ |
| Power system | injector |
| Engine power | 116 HP |
| Torque | 155 nm |
| Engine block | aluminum R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 83 mm |
| Piston stroke. | 78.5 mm |
| Compression ratio | 11 |
| Engine features | SOHC |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 5.0 liters 5W-30 |
| Fuel type | 95 |
| Environmental class | EURO 4/5 |
| Approximate life expectancy | 280 000 HP |
| Exact capacity | 2034 cm³ |
| Power system | injector |
| Engine power | 136 HP |
| Torque | 185 nm |
| Engine block | aluminum R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 83 mm |
| Piston stroke. | 94 mm |
| Compression ratio | 11 |
| Engine features | SOHC |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 5.0 liters 5W-30 |
| Fuel type | 95 |
| Environmental class | EURO 4/5 |
| Approximate life expectancy | 300 000 HP |
| Exact capacity | 2034 cm³ |
| Power system | injector |
| Engine power | 193 HP |
| Torque | 280 nm |
| Engine block | aluminum R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 83 mm |
| Piston stroke. | 94 mm |
| Compression ratio | 9.0 |
| Engine features | SOHC |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | BorgWarner K03 |
| What oils to use | 5.0 liters 5W-30 |
| Fuel type | 95 |
| Environmental class | EURO 4/5 |
| Approximate life expectancy | 250 000 HP |
| City | 10.2 litry |
| Route | 5.4 litry |
| Mixed | 7.2 litry |
The weight of the M266 engine according to the catalog is 90 kg. The engine number M266 is located at the junction of the block and the oil pan. This engine is very reliable, but it does not tolerate low-quality fuel. The injectors and throttle body quickly get dirty from bad gasoline. There are many complaints about lubricant leaks and fuel pump failure in the tank on specialized forums. The compressor clutch of the air conditioner and the generator are also considered weak points of the engine. Due to the design features, many operations are carried out only with the removal of the engine.
| A-Class W169 | 2004 - 2012 |
| B-Class W245 | 2005 - 2011 |
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.
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 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.
The V6 engine series of the Mercedes M112, with a displacement ranging from 2.4 to 3.7 liters, was produced from 1997 to 2007 and was practically installed in all extensively developed models of the German company. There was also an AMG version of the 3.2-liter engine with dual turbocharging, producing 354 horsepower and 450 Newton meters of torque. The V6 engine lineup also includes the M272 and M276 engines.
The 1.8-liter Nissan SR18DE engine was produced by the company in Japan from 1990 to 2002 and was installed in many popular mid-size models of that time. This powertrain, in its version with single-point fuel injection, was installed under a different designation - SR18Di. The SR family also includes engines: SR16VE, SR20DE, SR20DET, SR20VE, and SR20VET.
The 2.0-liter 16-valve Kia FED or FE-DOHC engine was produced from 1993 to 2006 and used in popular models such as the Clarus, Sportage, and the American version of the Spectra. This engine is actually a variant of the well-known Mazda FE-DE engine. Kia's own engines include: A3E, A5D, BFD, S5D, A6D, S6D, T8D, and FEE.