In 1954, Mercedes-Benz introduced the W180. Considered to be the beginning of the S-Class lineage, the W180 was available with a 2.2L inline engine. This engine was available in two versions which corresponded with the two variants available: the 220a and the 220 S. The 220 S was available in three bodystyles: sedan, coupe, and cabriolet, while the 220a was only available as a sedan. The Mercedes W180 was built until 1959.