That extended Q7 is not from Audi, but from a refit factory. There is only one series, which seems to be modified in 4.2. The length is about 10 meter, and the price should be between 200-300W w.

The Royal Luxury Car Modification Company from new york recently launched their latest product: 14-seat ultra-luxury extended Audi Q7! Like their previous 14-seat Range Rover, British finidi QX56 and Hummer, the new Q7 shows its luxurious atmosphere in their hands as much as possible. Including a full set of discos, glare lights, snake-shaped leather sofa, car-mounted mobile bar, double 17-inch LCD screen, and jet door.