The foundation of the Mercedes OM642 is a cast aluminum engine block, a feature that is somewhat unique in the United States, where diesel engines historically employ a cast iron or, more recently, a compacted graphite iron (CGI) engine block for the material's favorable strength characteristics. At 72 degrees, the engine's cylinder configuration is relatively narrow. The combined result is an engine that is both compact and lightweight. Its small displacement and sophisticated exhaust aftertreatment system not only meets strict regulations in the U.S., but grants the engine a ULEV (ultra-low emissions vehicle) certification in most, if not all designated localities.
Mercedes-Benz 3.0L Om642 Diesel Specs
| Engine | Mercedes 3.0L OM642 | |
| Manufacturer | Mercedes-Benz (a division of Daimler AG) | |
| Applications | 2007 - 2019 Freightliner Sprinter 2500/3500/4500 2007 - 2009 Dodge Sprinter 2500/3500 2010 - 2019 Mercedes Sprinter 2500/3500 |
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| Production Site: | Daimler AG Powertrain Plant, Marienfelde, Berlin, Germany | |
| Type | 4 stroke diesel | |
| Configuration | 72° V-6 | |
| Displacement | 2.986 liters, 182.40 CID | |
| Firing Order | 1 - 4 - 2 - 5 - 3 - 6 | |
| Cylinder Map (Numbers) |  |
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| Engine Block | Cast aluminum | |
| Cylinder Head | Cast aluminum | |
| Compression Ratio | 18.0 : 1 | |
| Cylinder Bore | 3.27 in (83 mm) | |
| Cylinder Stroke | 3.62 in (92 mm) | |
| Valvetrain | Dual overhead camshaft (DOHC), 4 valves per cylinder (24v total) | |
| Fuel [1] | Ultra low sulfur diesel (ULSD), B20 biodiesel compatible | |
| Injection | Direct injection, high pressure common rail, 23,000 psi max injection pressure | |
| Aspiration | Turbocharged, variable nozzle turbocharger | |
| Engine Weight (approx) | 460 lbs | |
| Engine Oil Capacity | 13.2 U.S. qts w/ filter change (12.5 liters) | |
| Engine Oil Viscosity [2] | SAE 0W-30, 0W-40 | Suitable for all temperatures |
| SAE 5W-30, 5W-40 | Suitable in temperatures > -10° F | |
| SAE 10W-30, 10W-40 | Suitable in temperatures > 0° F | |
| SAE 15W-30, 15W-40 | Suitable in temperatures > 0° F | |
| Horsepower [3] | 188 hp @ 3,800 rpm | |
| Torque [3] | 325 lb-ft @ 1,400 rpm (peak torque maintained through 2,400 rpm) | |
[1] - Although certified for the use of biodiesel blends up to B20 Mercedes recommends limiting biodiesel to a maximum B5; a more stringent maintenance regiment is recommended for vehicles using biodiesel blends greater than B5, including more frequent engine oil and fuel filter services.
[2] - Published oil viscosity temperature ranges have been modified slightly to follow a more conventional Fahrenheit temperature scale; some uncommon oil viscosities have been omitted. For complete oil options, refer to viscosity chart in owners manual. All engine oils must meet Mercedes-Benz 228.51, 229.31, 229.51, 229.52 service specifications, as applicable.
[3] - Horsepower and torque ratings for U.S. applications; ratings offered outside U.S. applications may vary.