[M3 n X5M]

Originally Posted by advantage20

There are indeed cyclical trends and if we go even further back we can find various crossover concepts, like for instance sedans with SUV treatment, which if re-introduced today would seem like a totally new niche (actually Scott was reporting such a project being considered by BMW and I think it would be cool, a la Audi Allroad but in sedan form).

Fact is that the first stock 4 door with genuine coupé silhouette in modern era is the Merc CLS launched in 2004.

You are right, if we look back at that model, it is the car in the 21st century that first uses the Coupe platform with a 4 door configuration.