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| Mercedes-Benz OM646 | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mercedes-Benz |
| Production | 2002–2010 |
| Layout | |
| Configuration | Inline-four engine |
| Displacement | 2.1 L (2,148 cc) |
| Cylinder bore | 88 mm (3.46 in) |
| Piston stroke | 88.3 mm (3.48 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminium alloy |
| Valvetrain | DOHC |
| Compression ratio | 17.5:1 (DE22 LA EVO), 18.0:1 |
| Combustion | |
| Turbocharger | Single |
| Fuel system | Common rail |
| Fuel type | Diesel |
| Cooling system | Water cooled |
| Output | |
| Power output | 65–125 kW (88–170 PS; 87–168 hp) |
| Torque output | 220–400 N⋅m (162–295 lb⋅ft) |
| Emissions | |
| Emissions target standard | Euro 4 |
| Emissions control systems | EGR, DPF |
| Chronology | |
| Predecessor | Mercedes-Benz OM611 engine |
| Successor | Mercedes-Benz OM651 engine |
The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz.