The Mercedes-Benz OM648 engine is a 3.2 Litre, straight-6 4 valves per cylinder, cast iron block diesel engine manufactured by the Mercedes-Benz division of Daimler AG as a replacement for the previous Mercedes-Benz inline-5 and -6 engines.
The engine features common rail fuel injection and a variable nozzle turbocharger. The injection system operates at .
Power output is at 4200 rpm and of torque from 1,800 to 2,600 rpm.
Mercedes claims this engine will propel the E320 CDI to in 6.6 seconds. All while managing + city and + Highway
Oil specification MB 229.31 or MB 228.31 is recommended and has a service interval of using the specified oil.
OM648 is the successor to the OM613.