( http://www.TFLcar.com ) Car manufacturers and journalist often play a cat and mouse game when it comes to snapping photos of prototype cars on public roads before the new cars are officially introduced at the world's auto shows. In this video we go in search of new prototype spy photos of cars in Colorado at 14,000 ft above sea level. Many international car manufactures bring their cars to the Colorado Rockies for high altitude testing. In this video we got lucky and captured both Mercedes-Benz and Volkswagen prototype cars testing on some of the highest roads in the world.