Mercedes' $1 million S-class Pullman upstages Rolls-Royce

The S-class Pullman will get stretched.

The new extra-long Pullman version of the Mercedes-Benz S class will cost more than double the Rolls-Royce Phantom when the Pullman goes on sale next year, according to a person familiar with details of the brand's strategy.

The 21-foot-long Pullman also will be about 16 inches longer than the $474,900 extended-wheelbase version of the Phantom, making it the biggest series-produced passenger car.

The Pullman, priced at about $1 million with armor plating, will have three rows of seats. The four rear seats will face each other and be separated from a front chauffeur compartment by a partition window, according to sources.