Mercedes-Benz OM651 engine
The OM651 is a family of inline-four cylinder automobile diesel engines introduced by Mercedes-Benz in 2008. Wikipedia
Compression ratio: 16.2:1
Cooling system: Water cooled
Cylinder block material: Cast iron
Cylinder head material: Aluminium alloy
Displacement: 1.8 L (1,796 cc); 2.1 L (2,143 cc)
Fuel system: Common rail
Manufacturer: Mercedes-Benz