Mercedes-Benz introduced their W112 sedan in 1961. Marketed as the 300 SE, these cars were based on the W111 Fintail, yet featured a more well-appointed interior, more standard options, and Mercedes' M189 3.0L inline 6 engine. In 1963, Mercedes introduced the SE Lang, which featured a long wheelbase. These 300SE sedans filled the gap at the top of Mercedes' model range between the 300d Adenauer and the Mercedes 600. Built until 1965, W112 sedans were not as massively produced as their W111 siblings, with only 6,748 short and long wheelbase examples made.