Hello, especially Cabrios show that the crash safety can still be fulfilled without any problems. A waiver of the B-pillar would result in better use of space and a better overview. In addition, of course, their optical appeals. Today, bodies have been manufactured for a long time by mixed construction methods. For example, the body is completely made of aluminium, the A-pillars and the other frames of the front window, however, made of a high-strength steel alloy. Opel Meriva brings Schmetterlinstüren with them, which open up opposite to Rolls Royce. If one would now leave the B-pillar out, that would be a completely new room concept. My picture example shows a coupe, but here too must be given de Crash safety and that will definitely be it with Mercedes! So why? Cost? I’m sure that the rear doors have to be hung up somewhere. But with opposite doors you could easily do that. iben is still available, as can be seen here at the E-Class Coupe. The manufacturers often show this in studies, but in series I am not aware of a 4-door vehicle, which does not have a B-pillar. As I said, the rear door could also be hung up in the area of the C-pillar, or B-pillar, if the vehicle does not have one. The doors would then open opposite.