![1978 Mercedes-Benz 300 SD Turbo Diesel W116 (Automatic / 4 Gears) RWD [1972-1980]](https://i0.wp.com/i0.wp.com/autogalactic.al/wp-content/uploads/2026/01/abc-188624505.jpg?fit=700%2C467&ssl=1&resize=360,270)
The 1978 Mercedes-Benz 300 SD Turbo Diesel is a landmark model, being the world’s first turbodiesel engine passenger car produced in series. Although originally designed for the North American market to meet consumption rates (CAFE), this model became famous for its legendary durability. It is powered by the OM617.950 engine, a 3.0-liter 5-cylinder in-line unit, which produces 115 PS / 113 hp / 84.5 kW and a torque of 227 Nm . This engine gave the W116 series an unprecedented efficiency for a luxury limousine, combining heavy-duty and safe chassis with diesel fuel saving. Equipped exclusively with 4-speed automatic gearboxes, the 300 SD offers a smooth ride and long motor life that often exceeds 500,000 kilometers without major repairs.