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 1600 bar. Power output is 204 PS at 4200 rpm and 500 Nm of torque from 1,800 to 2,600 rpm. Mercedes claims this engine will propel the E320 CDI to 60 mph in 6.6 seconds. All while managing 27 mpgus+ city and 37 mpgus+ Highway Oil specification MB 229.31 or MB 228.31 is recommended and has a service interval of 13000 mi using the specified oil. OM648 is the successor to the OM613.

Technical specifications