The Mercedes-Benz W123 is a range of executive cars produced by German manufacturer Mercedes-Benz from November 1975 to January 1986. The W123 models surpassed their predecessor, the Mercedes-Benz W114 models, as the most successful Mercedes, selling 2.7 million units before the production ended in the autumn 1985 for saloon/sedan and January 1986 for coupé and estate/station wagon.
The W123 300D has long had a reputation for longevity and operating economy. This five-cylinder oil burner transmits power to the rear wheels via a four-speed automatic, the only transmission available in US-market w123 300Ds.