This is the Maybach Landaulet Study, a half-chop concept for very rich people with a taste bypass, which would appear - if they're interested in a giant white Maybach in the first place -to be most of them, What you're looking at is a landau let: a covered chauffeur's cabin followed by wind-in-the-wallet open roofed rear chairs.
It amounts to a huge sliding fabric arrangement for the rear roof module of a 612bhp Maybach 62S, allowing rear seat VIPs to either wave to adoring fans or be spat at by vagrants. The driver gets a sombre black interior, as be fits his station, while the interior for the upper-crust passenger of choice is swathed in white 'Seychelles' leather, piano lacquer and black granite - entirely practical when some disgruntled plebeian uses it as a) a really big wheelie bin for his half-eaten kebab or b) a toilet.
The most astounding fact is not even that the floor is actually carpeted in white velour, but that if there's enough interest in the car, Maybach is considering a small production run, price on application. Is anyone but Paris Hilton really interested?