The Audi A8 had its Chinese launch in Guangzhou yesterday and left audiences impressed with the latest incarnation of the popular full size sedan. Interestingly, Mercedes top management were seen stalking the crowds at the Audi press launch.The Audi A8 L (long wheelbase) is 130 millimeters (0.43 ft) longer than the standard-wheelbase version. It comes with an extensive array of engines: two V6