Mercedes names often have a meaning. SL == Sport Leicht - Sport Light The number generally refers to the volume of the engine, e.g. SL 350 => 3.7 L engine S

Mercedes names often have a meaning. SL == Sport Leicht - Sport Light The number generally refers to the volume of the engine, e.g. SL 350 => 3.7 L engine SL 500 => 5.0 L engine That's true for many Mercedes (SLK - Sport Leicht Kurtz) Mercedes C - Coupé. You also have Mercedes A and B with the underlying meaning "it's a small Mercedes", etc. Generally speaking car names make sense within the brand.