The OM617 engine family was a straight-5

Straight-5

The straight-five engine or inline-five engine is an internal combustion engine with five cylinders aligned in one row or plane, sharing a single engine block and crankcase...

 Diesel

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...

 automobile engine from 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...

 used in the 1970s and 1980s. With some Mercedes-Benz 300D/300SD diesels already exceeding 500,000 miles, it's considered to be one of the most reliable engines ever produced (Along with the equally famous sister engine OM616

Mercedes-Benz OM616

The OM616 engine family was a straight-4 Diesel automobile engine from Mercedes-Benz used in the 1970s and 1980s.-OM616.916:The OM616.916 was a 2.4 L engine with power output of 65 hp . In August 1978 the precombustion chamber was updated for more swirl and more efficient combustion...

).

OM617.912

The OM617.912 was a 3.0 L (3005 cc) engine. Power output began at 80 hp (59 kW) but rose to 88 hp (65 kW) in 1979.

Applications:

• 80 PS (79 hp/59 kW)
  • 1974-1976 240D 3.0 / 300D
  • 1976-1979 300D
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1976-1979 300D Long
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1976-1979 300CD
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1976-1979 300TD
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
• 88 PS (87 hp/65 kW)
  • 1979-1985 300D
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1979-1985 300D Long
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1979-1985 300CD
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1979-1985 300TD
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    

OM617.950

The revised OM617.950 also displaced 3.0 L but was now 2998 cc with a 90.9 mm bore and 92.4 mm stroke. Power output was 110 hp (82 kW). This engine was used in the W116 300SD

Mercedes-Benz W116

The Mercedes-Benz W116 was a series of flagship vehicles produced from September 1972 through 1979. The W116 automobiles were the first Mercedes-Benz models to be officially called S-Class, although earlier sedan models had already unofficially been designated with the letter 'S' - for...

 from 1978 to 1980. It was the world's first turbocharged production diesel sedan and the first sedan with a 5-cylinder engine of any kind.

OM617.951

The OM617.951 also displaced 2998 cc with a 90.9 mm bore and 92.4 mm stroke. Power output was 125 hp (91 kW). Torque was rated at 180 lbft.

Applications:

• 123 PS (125 hp/91 kW)
  • 1981-1985 300SD Turbo
    Mercedes-Benz W126
    The Mercedes-Benz W126 is a series of flagship vehicles manufactured by German automotive marque Mercedes-Benz. Premiering in September 1979 as the successor to the earlier W116 line, the W126 was the second generation of the Mercedes-Benz flagship to officially bear the S-Class name referring to...
    
    

OM617.952

The OM617.952 also displaced 2998 cc with a 90.9 mm bore and 92.4 mm stroke. Power output was 125 hp (91 kW). Torque was rated at 180 lbft.

Applications:

• 123 PS (121 hp/91 kW)
  • 1982-1985 300D Turbo
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1982-1985 300CD Turbo
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...
    
    
  • 1981-1985 300TD Turbo
    Mercedes-Benz W123
    W123 is the internal chassis-designation Mercedes-Benz used for their executive line of cars, manufactured between 1976 and 1985.The W123 models surpassed their predecessor, the W114 and W115 models, as the most successful Mercedes, selling 2.7 million cars before replacement by the W124 after 1985...