For decades, royal families, heads of state, and other dignitaries have chosen Mercedes-Benz’s limousine-like Pullman sedans to chauffeur them around in style. For the 50th anniversary of the best-known Pullman sedan, the 600, Mercedes-Maybach—the sub-brand recently relaunched by Mercedes-Benz’s parent company, Daimler AG, with the Mercedes-Maybach S600—debuted the brand-new 2016 Mercedes-Maybach Pullman at the Geneva International Motor Show this month.

Derived from luxurious open-plan railway compartments…