Mercedes-Benz produces a 4-stroke diesel engine with a displacement of 9572 cc, or roughly 575 cc. It is a part of the 400 engine series, which supplements the 300 engine series and started development in 1969.
The first V6 diesel engine in the 400 series is the OM 401. When the engine was first introduced in 1975, it had 192 horsepower (141 kW), but it now has 313 horsepower (230 kW). The majority of the engines were produced for export. Despite being the smallest of the 400 series V-engines, the OM401 boasts high fuel efficiency and turbocharging.
Specifications
| Manufacturer | Mercedes-Benz |
| Also called | OM 401 |
| Production years | 1975 |
| Cylinder block alloy | cast iron |
| Fuel system | direct injection |
| Configuration | V |
| Number of cylinders | 6 |
| Valves | 12 |
| Piston stroke, mm | 130 |
| Cylinder bore, mm | 125 |
| Compression ratio | 16.75:1 |
| Displacement, cc | 9572 |
| Power output, hp | 313/2000 |
| Torque output, Nm / rpm | 1600/2000 |
| Fuel type | diesel |
| Euro standards | Euro II |
| Firing order | 1-4-2-5-3-6 |
| Engine lifespan, thousand km — official information |
1 000 |
The design of this engine complies with Euro II environmental regulations. Since the 1980s, OM 401 has been extensively utilized in medium-duty trucks, road machinery, and combine harvesters, especially the CLAAS Lexion 460.
Explanation of OM401 marking
| OM | Heavy Fuel Oil (Diesel) ICE |
| 401 | Engine type: 6-cylinder V-shaped. |