The SL-Class of Mercedes-Benz models is just one of the many Classes produced by the brand throughout the years. The grand tourer sports cars were first introduced back in 1954. The "SL" stands for super light and the cars were made to target performance enthusiasts in the post-war American market. There have been many different marketing variations of the vehicle and a range of models to come out of the lineup. One of these models was the SL 400 . The SL 400 was a car that was introduced in 2015 and featured a V6 biturbo engine. The car received a facelift in 2017 and was renamed the SL 450 on the American market. You want to be sure you're using the right OEM parts and accessories on your Mercedes, so get them from our site here for your SL 400 .