Famous for its swarms of scooters, Vietnam is seeing auto sales surge amid the rapid expansion of a young, style-conscious middle class after 15 straight years of economic growth of over 5 percent. While major regional car markets Indonesia and Thailand saw annual declines in auto sales last year, Vietnam’s leapt 43 percent, Vietnam Automobile Manufacturers Association (VAMA) data shows. Toyota, Mercedes-Benz, Ford and Honda reported solid annual sales increases, despite high import taxes.