The grille is replaced by a "3D display" that both displays the vintage Mercedes logo and, more importantly, shows the car's status in an instant. The cockpit adheres to the minimalist look of very early cars through projections that display context-sensitive information such as speed and navigation. You can focus your attention on running the retro tour rather than processing a sea of information. Porsche, notice.
You are unlikely to see a production version of Simplex. It does not have a windscreen or rated output, let alone the equipment needed to meet modern safety standards. This is more of an illustration of how Mercedes could recall its roots without relinquishing today's creatures. Don't be surprised if you see the projections and other elements finding their way into road cars, even in limited form.