The Mercedes-Benz OM648 engine is a 3.2 Litre, Straight-Six

Straight-6

The straight-six engine or inline-six engine is a six-cylinder internal combustion engine with all six cylinders mounted in a straight line along the crankcase...

 (I6) 24-valve

Valve

A valve is a device that regulates, directs or controls the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but are usually discussed as a separate category...

, cast iron

Cast iron

Cast iron is derived from pig iron, and while it usually refers to gray iron, it also identifies a large group of ferrous alloys which solidify with a eutectic. The color of a fractured surface can be used to identify an alloy. White cast iron is named after its white surface when fractured, due...

 block diesel engine

Diesel engine

A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...

 manufactured by the Mercedes-Benz

Mercedes-Benz

Mercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...

 division of Daimler AG as a replacement for the previous Mercedes-Benz inline-5 and -6 engines.

The engine features common rail

Common rail

Common rail direct fuel injection is a modern variant of direct fuel injection system for petrol and diesel engines.On diesel engines, it features a high-pressure fuel rail feeding individual solenoid valves, as opposed to low-pressure fuel pump feeding unit injectors...

 fuel injection

Fuel injection

Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....

 and a variable nozzle turbocharger

Turbocharger

A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...

. The injection system operates at 1,600 bar (23,000 psi).

Power output is 150 kW (204 PS; 201 hp) @4200 RPM and 500 N·m (369 lb·ft) of torque from 1,800-2,600 RPM.

Mercedes claims this engine will propel the E320 CDI to 60 mph in 6.6 seconds. All while managing 27+ city MPG and 37+ Highway MPG

Oil specification MB 229.51 or MB 228.31 is recommended and has a service interval of 13,000 miles using the specified oil.

Technical specifications

Displacement	Bore	Stroke	Cylinders	Valves	Power	Torque	Applications
rowspan="3"|3222 cc	88.0 mm	88.3 mm	straight-6 Straight-6 The straight-six engine or inline-six engine is a six-cylinder internal combustion engine with all six cylinders mounted in a straight line along the crankcase...	24	177 PS @4200 rpm	425 newton metres (313.5 ft·lbf) @1800–2600 rpm	2005 E280 CDI Mercedes-Benz W211 The Mercedes-Benz W211 is a mid-size luxury car–executive car which was produced by the German automaker Mercedes-Benz from 2002 to 2009, under the E-Class model names. The W211 models replaced the W210 E-Class models and were superseded by the Mercedes-Benz W212 in 2009...
204 PS @4200 rpm					500 newton metres (368.8 ft·lbf) @1800 rpm	2003-2006 E320 CDI Mercedes-Benz W211 The Mercedes-Benz W211 is a mid-size luxury car–executive car which was produced by the German automaker Mercedes-Benz from 2002 to 2009, under the E-Class model names. The W211 models replaced the W210 E-Class models and were superseded by the Mercedes-Benz W212 in 2009...  and 2002-2006 S320 CDI Mercedes-Benz W220 The Mercedes-Benz W220 was a series of flagship sedans which constituted the Mercedes-Benz S-Class during the early-to-mid 2000's. Development for the W220 S-Class started in 1992, with the final design being approved in 1996 spanning a total of 38 months. The completed prototypes were presented in...