OM 612

The OM 612 is a 2.7L inline-five diesel engine that was produced from 1999 to 2006. It was the first Mercedes-Benz diesel engine to feature common rail direct injection, and it was also one of the first diesel engines to meet the Euro 4 emissions standards. The OM 612 was known for its smooth operation, low fuel consumption, and high torque output. It was used in a variety of Mercedes-Benz vehicles, including the Sprinter van, the Vito van, and the M-Class SUV.

OM 647

The OM 647 is a 2.7L inline-five diesel engine that was produced from 2004 to 2010. It is essentially an updated version of the OM 612, with a number of improvements, including a new variable geometry turbocharger and a revised common rail injection system. The OM 647 was even more fuel-efficient and powerful than the OM 612, and it was also cleaner, meeting the Euro 5 emissions standards. The OM 647 was used in a variety of Mercedes-Benz vehicles, including the Sprinter van, the Vito van, and the V-Class minivan.

OM 642

The OM 642 is a 3.0L V6 diesel engine that was produced from 2005 to 2023. It is a highly advanced engine that features a number of innovative technologies, including common rail direct injection, a variable geometry turbocharger, and a counter-rotating balance shaft. The OM 642 is known for its excellent performance, fuel efficiency, and refinement. It was used in a wide range of Mercedes-Benz vehicles, including the S-Class sedan, the E-Class sedan, the ML-Class SUV, and the GLE-Class SUV.

OM 651

The OM 651 is a 2.1L inline-four diesel engine that was produced from 2008 to 2023. It is a successor to the OM 646 diesel engine, and it features a number of improvements, including a new common rail injection system, a variable geometry turbocharger, and a new emissions control system. The OM 651 is known for its excellent fuel efficiency and low emissions. It was used in a variety of Mercedes-Benz vehicles, including the C-Class sedan, the E-Class sedan, and the GLK-Class SUV.

All four of these Mercedes Sprinter diesel engines are highly regarded for their reliability, performance, and efficiency. They have been used in a wide range of Mercedes-Benz vehicles, and they have helped to make Mercedes-Benz a leader in the development of diesel engine technology.

Here is a table comparing the four engines:

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