The "300 SD" in Mercedes-Benz 300 SD refers to three models in several of the marque's series.

The first, a "base" 300 SD sedan, ran from 1978 to 1980. It was a member of Mercedes-Benz Series 116 (W 116 D 30 A) and part of the nascent Mercedes-Benz S-Class. The car incorporated a four-stroke, in-line, five-cylinder diesel engine with an exhaust turbocharger, a single overhead camshaft, and a Bosch five-plunger injection pump. Paired with a standard four-speed automatic transmission, it could produce 111 horsepower. After 1979, engine output rose to 121 horsepower.

The second, the Mercedes-Benz 300 SD Turbodiesel, debuted in 1980 and ran until its discontinuation in 1985. It was also a sedan and a member of the Mercedes-Benz S-Class, except one in Mercedes-Benz Series 126 (W 126 D 30 A). It, too, had a four-stroke diesel I5 engine, and turbocharger, cam, fuel-injector, and transmission specs were similar. However, the car achieved 121 horsepower at the outset, until late 1982, when output got a bump to 125 horsepower.

The final model, another base-style 300 SD, was available for the 1991, 1992, and 1993 model years. It was a sedan in Mercedes-Benz Series 140 (W 140 D 35 A) and also in the Mercedes-Benz S-Class. This car, however, had a turbocharged four-stroke, inline-six diesel engine with an emissions control system containing an oxidizing catalyst. Cam and gearbox specs may have been the same, but the injection pump was now a Bosch six-plunger type. Engine output was 150 horsepower. In 1993 and 1994, the model became the Mercedes-Benz S 350 Turbodiesel.

Searching for Mercedes-Benz 300 SD parts? Be sure to get the genuine article. Unlike what the aftermarket manufactures, your OEM designs its parts specifically for its classic cars, guaranteeing that they'll fit yours.

Where to Buy Genuine OEM Parts for Mercedes-Benz 300 SD Models Online

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