Chinese EV giant BYD has launched its luxury Denza brand in Europe to compete with BMW and Mercedes.The company will initially import Denza vehicles from China but plans to start production in Hungary next month.BYD's Denza Z9 GT, a high-end electric vehicle, will be the first model to be sold in Europe.BYD aims to introduce advanced technologies in Denza vehicles before including them in lower-priced BYD-branded units.