Mercedes-Benz is preparing to show the pinnacles of its engineering and luxury prowess at the 2015 Geneva Motor Show in March.

Towering in physical size among these new vehicles is the long-awaited debut of the S-Class Pullman, according to Reuters. If you think the nearly $200,000 Mercedes-Maybach S600 (pictured above) is the ultimate in opulence available on Mercedes' flagship sedan, think again. The Pullman is the true top dog at a rumored 21-feet long and at a price of around $1 million for the armored version. Earlier patent photos suggest what this behemoth might look like.

The driver reportedly sits in a partitioned cabin up front, and the plutocratic passengers are nestled in two facing rows of seats in the rest of the extremely long body. It's possible that Mercedes might not even build the Pullman in-house and leave the duty up to Brabus. However, there's also a rumor that the massive model might not be offered in the US.

According to Reuters, the German company is also proving that it can be green by displaying the C-Class Plug-in Hybrid in Geneva. If Mercedes' display of luxury and efficiency don't strike your fancy, then the automaker is bringing some performance with its future Mercedes-AMG GT GT3 racer to the Swiss show.