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|Production||1974 to 1990|
The OM617 engine family was a straight-5 Diesel automobile engine from Mercedes-Benz used in the 1970s and 1980s. It is closely related to the straight-4 OM616. Starting in 1978, a turbocharger was fitted to engines used in the 300SD. The OM617 is considered to be one of the most reliable engines ever produced, and is one of the key reasons for Mercedes' popularity in North America in the 1980s, as it was powerful and reliable compared to other automotive diesels of the 1980's.
The OM617.910 was a 3.0 L (3005 cc) engine. Power output was 80 hp (59 kW)@4000rpm. It was first used in the W115 chassis. The engine was left unchanged in 1977, when the W115 was replaced by the W123. An upgraded version, the OM617.912, was introduced in 1979 rated at 88 hp (65 kW)@4400rpm.
- 80 PS (79 hp/59 kW)
- 88 PS (87 hp/65 kW)
The revised OM617.950 displaced 3005 cc. The addition of a turbocharger raised the power output to 110 hp (82 kW). In 1978, the OM617.950 was mated with the Mercedes-Benz W116 to produce the North American market-only 300SD, the world's first production turbodiesel sedan.
- 1978-1979 Mercedes W116 300SD
The OM617.951 was introduced in 1979 and displaced 2998 cc, using a 90.9 mm bore and 92.4 mm stroke. Power output was 125 hp (91 kW). Torque was rated at 180 lb·ft (244 N·m).
The OM617.952 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 lb·ft (244 N·m).
- 123 PS (121 hp/91 kW)