The Mercedes-Benz S family of luxury cars is one of the most influential ever made. The S has largely been built as a four door luxury sedan, but has also been offered as a coupe or convertible in certain generations. As one of Mercedes' flagship models, the S has introduced groundbreaking safety innovations, as well as established a standard of engineering and refinement that many other marques measure up to. While only officially christened as the S-Class in 1973, S models trace their origin to 1954. The Mercedes-Benz S lineage is as follows: W180 (1954-1959), W128 (1958-1960), W111 (1959-1971), W112 (1961-1967), W108/W109 (1965-1973), W116 (1973-1980), W126 (1980-1991), W140 (1992-1999), W220 (2000-2006), W221 (2007-2013), W222 (2014-2020), and W223 (2021-).