Mercedes-Benz SL-Class
Overview
 
The Mercedes-Benz SL is a grand tourer
Grand tourer
A grand tourer is a high-performance luxury automobile designed for long-distance driving. The most common format is a two-door coupé with either a two-seat or a 2+2 arrangement....

 manufactured by Mercedes since 1954. The designation SL derives from the German Sport Leicht, or Sport Lightweight — and was first applied to the 300SL
Mercedes-Benz 300SL
The Mercedes-Benz 300SL was introduced in 1954 as a two-seat, closed sports car with distinctive gull-wing doors. Later it was offered as an open roadster...

 'Gullwing' named also after its gullwing or upward-opening doors.

The term SL-Class refers to the marketing variations of the vehicle, including the numerous engine configurations spanning five design generations.
The 300SL roadster
Roadster
A roadster is a two-seat open car with emphasis on sporty handling and without a fixed roof or side weather protection. Strictly speaking a roadster with wind-up windows is a convertible but as true roadsters are no longer made the distinction is now irrelevant...

 succeeded the Gullwing in 1957.
 
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