The 2.2-liter diesel engine Mercedes OM 646 was produced from 2002 to 2010 and installed in the C-Class, CLK-Class, E-Class models, as well as in Vito and Sprinter minibuses. There was a version of this engine with a transverse arrangement, the OM 644, for the Chrysler PT Cruiser. The R4 engine lineup includes: OM616 OM601 OM604 OM611 OM640 OM651 OM654 OM668
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 2148 cm³ |
| Cylinder diameter | 88 mm |
| Piston stroke. | 88.3 mm |
| Power system | Common Rail |
| Power | 88 - 122 HP |
| Torque | 220 - 290 nm |
| Compression ratio | 18.0 |
| Fuel type | diesel |
| Environmental class | EURO 3 |
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 2148 cm³ |
| Cylinder diameter | 88 mm |
| Piston stroke. | 88.3 mm |
| Power system | Common Rail |
| Power | 129 - 150 HP |
| Torque | 305 - 340 nm |
| Compression ratio | 18.0 |
| Fuel type | diesel |
| Environmental class | EURO 3 |
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 2148 cm³ |
| Cylinder diameter | 88 mm |
| Piston stroke. | 88.3 mm |
| Power system | Common Rail |
| Power | 136 HP |
| Torque | 270 - 340 nm |
| Compression ratio | 17.5 |
| Fuel type | diesel |
| Environmental class | EURO 4 |
| Typ | row |
| Number of cylinders | 4 |
| number of valves | 16 |
| Exact capacity | 2148 cm³ |
| Cylinder diameter | 88 mm |
| Piston stroke. | 88.3 mm |
| Power system | Common Rail |
| Power | 170 HP |
| Torque | 400 nm |
| Compression ratio | 17.5 |
| Fuel type | diesel |
| Environmental class | EURO 4 |
| City | 8.8 litry |
| Route | 5.0 litry |
| Mixed | 6.3 litry |
The weight of the OM646 engine according to the catalog is 204 kg. The engine number can be found in two places. Fuel system: The engine is equipped with a reliable Bosch fuel system with electromagnetic injectors, but leaks from the seals of the injection pump or wear of the metering valve are common. Also, like its predecessor, the refractory washers under the injectors often burn out. Swirl flaps: Plastic swirl flaps in the intake manifold cause a lot of trouble here: they quickly break and come off, and air is sucked in through the holes in their axes. Bearing rotation: The most serious problem is bearing rotation at a mileage of 200 - 300 thousand km. Poor maintenance is considered the main cause, so update the lubrication more often. Other problems: Like many others, these diesel engines are often plagued by oil leaks or air suction. Versions with a single turbo are reliable, but bi-turbo modifications can be troublesome.
| C-Class W203 | 2003 - 2007 |
| C-Class W204 | 2007 - 2009 |
| CLC-Class C203 | 2008 - 2010 |
| CLK-Class C209 | 2005 - 2009 |
| E-Class W211 | 2002 - 2009 |
| V-Class W639 | 2003 - 2010 |
| Sprinter W906 | 2006 - 2009 |
| Sprinter Classic | 2013 - CE |
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 3.0-liter, inline, five-cylinder Mercedes OM 617 engine was produced from 1974 to 1990 and installed in popular models such as the W123, W126, and the off-road vehicle Geländewagen. This diesel engine was continuously modernized, so there are several versions of it. The R5 engine lineup also includes the following diesel units: OM602, OM605, OM612, and OM647.
Mercedes OM603 6-cylinder engines with a capacity of 3.0 and 3.5 liters were produced from 1984 to 1997 and installed in many popular models of the German company, such as W124, W126, and W140. There were three versions of this diesel engine available: one naturally aspirated and two with turbocharging. The R6 engine line also includes diesel units: OM606, OM613, OM648, and OM656.
The 3.2-liter inline 6-cylinder Mercedes OM648 engine was produced from 2002 to 2006 and was exclusively installed in the W211 body E-Class models and the upgraded W220 body S-Class models. In addition to the standard version with a power output of 204 horsepower, a variant with reduced power output of 177 horsepower was also offered. The R6 series also includes diesel engines: OM603, OM606, OM613, and OM656.
The 4.0-liter Audi CEUA or A8 4.0 TFSI engine was produced by the company in the years 2012-2013 and installed in versions with forced induction of the popular sedan A8 in the D4 body before the facelift. After the facelift of this model, this engine made way for a more powerful unit with the CTGA index. The EA824 series includes: ABZ, AEW, AXQ, BAR, BFM, BVJ, CDRA, and CRDB.
The 3.0-liter Audi CCWA 3.0 TDI engine was manufactured by the German company from 2007 to 2012 and used in well-known models such as the A4, A5, and Q5 crossover in the 8R body style. This diesel engine belongs to the modernized EA896 series, also known as EVO or G2. The EA896 line also includes the following engines: ASB, BPP, BKS, BMK, BUG, and CASA.