The true pillarless hardtop design, with all side glass down, is a defining feature owners specifically buy the car for. The rear seat is praised as genuinely comfortable and usable, unlike a 2+2, though access is awkward; the coupe is described as a far more personalized experience than the sedan.
Pillarless profile and rear-seat comfort
Mercedes-Benz S-Class Coupe / CL (C140) · driving