The 3.0-liter V6 diesel engine Mercedes OM 642 has been produced by the company since 2005 and is practically installed in all models from the C-Class to the G-Class SUV, as well as in the Vito vans. This diesel engine is also actively used in Chrysler and Jeep models under its own designation EXL.
| Typ | V-type |
| Number of cylinders | 6 |
| number of valves | 24 |
| Exact capacity | 2987 cm³ |
| Cylinder diameter | 83 mm |
| Piston stroke. | 92 mm |
| Power system | Common Rail |
| Power | 184 - 204 HP |
| Torque | 400 - 500 nm |
| Compression ratio | 18.0 |
| Fuel type | diesel |
| Environmental class | 4/5/6 |
| Typ | V-type |
| Number of cylinders | 6 |
| number of valves | 24 |
| Exact capacity | 2987 cm³ |
| Cylinder diameter | 83 mm |
| Piston stroke. | 92 mm |
| Power system | Common Rail |
| Power | 211 - 235 HP |
| Torque | 440 - 540 nm |
| Compression ratio | 18.0 |
| Fuel type | diesel |
| Environmental class | 4/5 |
| Typ | V-type |
| Number of cylinders | 6 |
| number of valves | 24 |
| Exact capacity | 2987 cm³ |
| Cylinder diameter | 83 mm |
| Piston stroke. | 92 mm |
| Power system | Common Rail |
| Power | 231 - 265 HP |
| Torque | 540 - 620 nm |
| Compression ratio | 18.0 |
| Fuel type | diesel |
| Environmental class | 5/6 |
| City | 12.7 litry |
| Route | 7.5 litry |
| Mixed | 9.4 litry |
The weight of the OM642 engine assembly is 220 kg. The engine number is located at the front, at the junction of the block and the head. There are leaks in the heat exchanger. The most well-known problem with this diesel engine is the leaks in the heat exchanger gaskets, and since it is located in the block assembly, replacing the inexpensive gaskets can be costly. In approximately 2010, the design was improved and similar leaks are no longer encountered. The power unit is equipped with a reliable Common Rail fuel system from Bosch, but its piezo injectors are very demanding in terms of fuel quality and are also expensive. It is also worth noting the regular failures of the fuel quantity control valve in the fuel pump. In the intake manifold of this power unit, there are steel swirl flaps, but they are controlled by servo drives with plastic rods, which often break. The problem is exacerbated by contamination in the intake due to the weak VKG membrane. The turbocharger itself, produced by Garrett, is very durable and runs smoothly up to 300,000 km, except that the system for changing its geometry often gets stuck due to severe contamination. Most often, the turbine is damaged by debris from the destruction of the welded joints of the exhaust manifold. Other problems with this engine include frequent oil leaks and a not very durable oil pump, and since it is sensitive to oil pressure, bearing wear is not uncommon.
| C-Class W203 | 2005 - 2007 |
| C-Class W204 | 2007 - 2014 |
| CLS-Class W219 | 2005 - 2010 |
| CLS-Class W218 | 2010 - 2018 |
| CLK-Class C209 | 2005 - 2010 |
| E-Class C207 | 2009 - 2017 |
| E-Class W211 | 2007 - 2009 |
| E-Class W212 | 2009 - 2016 |
| E-Class W213 | 2016 - 2018 |
| R-Class W251 | 2006 - 2017 |
| ML-Class W164 | 2007 - 2011 |
| ML-Class W166 | 2011 - 2015 |
| GLE-Class W166 | 2015 - 2018 |
| G-Class W463 | 2006 - 2018 |
| GLK-Class X204 | 2008 - 2015 |
| GLC-Class X253 | 2015 - 2018 |
| GL-Class X164 | 2006 - 2012 |
| GLS-Class X166 | 2012 - 2019 |
| S-Class W221 | 2006 - 2013 |
| S-Class W222 | 2013 - 2017 |
| Sprinter W906 | 2006 - 2018 |
| Sprinter W907 | 2018 - CE |
| X-Class X470 | 2018 - 2020 |
| V-Class W639 | 2006 - 2014 |
| 300C 1 (LX) | 2005 - 2010 |
| Commander 1 (XK) | 2006 - 2010 |
| Grand Cherokee 3 (WK) | 2005 - 2010 |
The range of Mercedes OM651 diesel engines with a capacity of 1.8 and 2.2 liters has been produced since 2008 and installed in many modern models of the German company, including commercial vehicles. This powertrain is available in a huge number of different versions and modifications. The R4 family includes: OM616 OM601 OM604 OM611 OM640 OM646 OM654 OM668
The 2.0-liter diesel engine Mercedes OM 654 was introduced by the company only in 2016 and is characterized by an aluminum cylinder block with plasma-sprayed Nanoslide iron coating. There is a version of the transverse OM 654q layout as well as an updated modification OM 654M. The R4 series includes: OM616 OM601 OM604 OM611 OM640 OM646 OM651 OM668
The 1.7-liter engine of the Mercedes OM668 or Vaneo 1.7 CDI was produced from 1998 to 2005 and only installed in the first generation A-Class model or similar compact vaneo. For the diesel engine, there were two versions: standard DE 17 LA and reduced DE 17 LA red, without an intercooler. The R4 engines include: OM615 OM601 OM604 OM611 OM640 OM646 OM651 OM654
The 3.2-liter inline 6-cylinder engine Mercedes OM613 was produced from 1999-2003 and installed only in two models: the E-Class (W210) and the S-Class (W220). This engine was available only in one version, the 320 CDI with a power of 197 HP and a torque of 470 Nm. The inline R6 engine family also includes diesel engines: OM603, OM606, OM648, and OM656.
The 2.7-liter R5 diesel engine Jeep ENF or 2.7 CRD was produced from 2002 to 2005 and installed only in the European versions of the Grand Cherokee SUV, in the WJ body. This diesel engine was manufactured by Daimler AG and had its own index OM 612 DE 27 LA. The Mercedes series also includes the following engines: EDJ, ENE, and EXL.
The 1.8-liter Mitsubishi 4D65 diesel engine was produced by the company from 1983 to 1995 and installed in many of their passenger car models, such as Colt, Lancer, and Galant. This powertrain was available in both naturally aspirated and turbocharged versions. Another engine that belongs to the 4D6 series is the 4D68.