Mercedes-Benz W189

The Mercedes-Benz W189, marketed as the 300d, was a four-door luxury tourer that Mercedes-Benz produced between 1957 and 1962 as its flagship, equivalent to the modern S-Class and Maybach. It was introduced in August 1957 as the enlarged successor of the W186 300c, on the same X-frame chassis, with modernised bodywork, a unique pillarless hardtop configuration and a 3.0 litre M189 straight-six with Bosch mechanical direct injection that produced 180 PS. It was available as a saloon and as a cabriolet, with a three-speed Borg-Warner automatic transmission as standard. Often called the Adenauer after Chancellor Konrad Adenauer, who used six custom versions of it and the W186, it was succeeded in 1963 by the 600.