In the spring of 1971, the 280SL was replaced by a brand new development - the 350SL. Showing only a slight resemblance to its predecessor, this new series SL featured a body and chassis built to class-leading levels of vehicle safety, and featured styling which was to become a benchmark in Mercedes-Benz design for nearly two decades. Like the 280SL, the new SL was a two-seater, with a fully retractable roadster soft top as well as a removable hard top. First available only with a 3.5-liter V8 and ultimately culminating in the 1986 5.6-liter V8 560SL, this series was built until 1989, more than 18 years after its debut, a true testament to its popularity.