OM 617

The OM617 engine family was a straight-5 Diesel automobile engine from Mercedes-Benz 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.

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
  • 1976-1979 300D
  • 1976-1979 300D Long
  • 1976-1979 300CD
  • 1976-1979 300TD
• 88 PS (87 hp/65 kW)
  • 1979-1985 300D
  • 1979-1985 300D Long
  • 1979-1985 300CD
  • 1979-1985 300TD

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 from 1978 to 1980. It was the world's first turbocharged production diesel sedan.

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Mercedes-Benz OM617.95

OM617.951

Mercedes-Benz OM617 in 300SD

The OM617.951 also displaced 2998 cc with a 90.9 mm bore and 92.4 mm stroke. Power output was 123 hp (91 kW) at first but rose to 125 hp (92 kW) in 1983. Torque was rated at Mal:Auto ft.lbf.

Applications:

• 123 PS (121 hp/91 kW)
  • 1981-1983 Mercedes-Benz W126 300SD Turbo
• 125 PS (123 hp/92 kW)
  • 1983-1985 Mercedes-Benz W126 300SD Turbo

OM617.952

The revised OM617.952 also displaced 3.0 L but was now 2998 cc with a 90.9 mm bore and 92.4 mm stroke. Power output was 123 hp (91 kW) at first but rose to 125 hp (92 kW) in 1983. Torque was rated at Mal:Auto ft.lbf.

Applications:

• 123 PS (121 hp/91 kW)
  • 1982-1985 300D Turbo
  • 1982-1985 300CD Turbo
  • 1981-1985 300TD Turbo