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
| Exact capacity | 1689 cm³ |
| Power system | Common Rail |
| Engine power | 60 - 75 HP |
| Torque | 160 nm |
| Engine block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder diameter | 80 mm |
| Piston stroke. | 84 mm |
| Compression ratio | 19.5 |
| Engine features | EGR |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | BorgWarner K03 |
| What oils to use | 4.5 liters 5W-30 |
| Fuel type | diesel |
| Environmental class | EURO 3 |
| Approximate life expectancy | 250 000 HP |
| Exact capacity | 1689 cm³ |
| Power system | Common Rail |
| Engine power | 90 - 95 HP |
| Torque | 180 nm |
| Engine block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder diameter | 80 mm |
| Piston stroke. | 84 mm |
| Compression ratio | 19.5 |
| Engine features | EGR, intercooler |
| Hydraulic compensator. | tak |
| Timing drive | chain |
| Timing phase adjuster | there is no |
| Turbocharging | BorgWarner K03 |
| What oils to use | 4.5 liters 5W-30 |
| Fuel type | diesel |
| Environmental class | EURO 3 |
| Approximate life expectancy | 240 000 HP |
| City | 7.4 litry |
| Route | 5.1 litry |
| Mixed | 5.9 litry |
The weight of the OM668 engine according to the catalog is 136 kg. The OM668 engine number is located at the junction of the block and the oil pan. There is little space under the hood, and in order to service the diesel engine, it needs to be lowered with a subframe. The Bosch fuel system is reliable, with only the fuel pressure regulator often failing. If there is a loss of power, check the pressure sensor in the intake manifold and its hose. Fuel leaks from the injection pump or oil leaks from the heat exchanger are also commonly found here. Weak points of this unit also include the flow meter, generator, and EGR valve. The turbocharger cannot be called weak, but it often requires repair by 200,000 km of mileage. After 200,000 km, piston rings often get stuck and oil consumption appears.
| A-Class W168 | 1998 - 2004 |
| Vaneo W414 | 2001 - 2005 |
The 2.4-liter inline diesel engine from Mercedes, called the OM 616, was produced from 1973 to 1992 and was installed in both medium-sized models such as the W115, W123, and the G-Wagen off-road vehicle. This powertrain was significantly modernized in 1978, hence it has two versions. The four-cylinder engines include: OM615 OM601 OM604 OM611 OM640 OM646 OM651 OM668
2.0 liter engine Mercedes OM640 or A-Class 2.0 CDI was produced from 2004 to 2012 and was only mounted in the second generation of A-Class and similar compact van class B. This propulsion system essentially replaced the popular diesel engine OM668 with a capacity of 1.7 liters. The R4 series includes: OM615 OM601 OM604 OM611 OM646 OM651 OM654
The 2.7-liter 5-cylinder inline engine of the Mercedes OM612 was produced from 1999 to 2007 and installed in popular models of the company such as the W203, W210, W163, and Gelandewagen. There was also an AMG version of this diesel engine with a capacity of 3.0 liters and a power output of 230 hp. In the R5 engine lineup, there are also diesel engines: OM617, OM602, OM605, and OM647.
The 2.9-liter, 6-cylinder diesel engine of the Mercedes OM 656 has been produced since 2017 and is installed in many modern models of the company, such as W213, W222 or W463. This diesel engine has an aluminum block and plasma-sprayed Nanoslide-coated iron. Also included in the R6 lineup are: OM603, OM606, OM613 and OM648.
1.6-liter diesel engine Fiat 198A2000 or 1.6 JTD was produced from 2008 to 2015 and installed in the popular Bravo model in Europe, as well as the similar third-generation Lancia Delta. This engine can also be found under the hood of the compact hatchback Alfa Romeo MiTo. The Multijet II series includes: 198A3000, 198A5000, 199B1000, 250A1000, and 263A1000.
1.2-liter turbocharged engine Volkswagen CJZA 1.2 TSI was installed from 2012 to 2015 and used in the seventh generation Golf, as well as its counterparts Skoda Octavia and Audi A3. This powertrain quickly made way for the EURO 6 version of the engine with the index CYVB. The EA211-TSI lineup includes: CJZB, CMBA, CXSA, CZCA, CZDA, CZEA, and DJKA.