There are a number of different Classes produced by Mercedes-Benz, each designating various kinds of cars with different features. The S-Class is considered to be the flagship vehicle for the brand and features a range of cars such as luxury sedans, limos, and armored cars. The S-Class designates the "top-of-the-line" when it comes to models produced by Mercedes-Benz and they were first introduced in 1972. A lot of the brands innovations were premiered on the S-Class models. Many models rolled off the assembly line, including the S 420. The first generation of S 420 models were introduced back in 1979 as 1980 models. They were part of the W126 series in the S-Class lineup. If you're in need of parts or accessories for your S 420, you want to be sure they're OEM Mercedes-Benz parts. Find them here on our site.