Over the last three decades, there's been a common thread making Mercedes designs instantly recognizable and a lot of credit for that belongs to MBZ design boss Peter Pfeiffer. After forty years at Mercedes-Benz, and thirty years overseeing design, Pfeiffer is headed for retirement within the next 12 months. It was under Pfeiffer's pen that Mercedes turned out some of its most important cars. Vehicles like the 190, the W126 S-Class, original E-Class, and more recent work like the R, M, and G-class non-cars, to name a few. Gorden Wagener, president of Mercedes-Benz Advanced Design in North America is a name being bandied about as Pfeiffer's replacement, and Mercedes will be making an official announcement soon. After such a long stint under the same chief, it will be interesting to see whether Mercedes design changes, and if so, how those changes will be received by the public.