Barcelona’s Auto Trade on a Roll

BARCELONA, Spain — In the middle of the rolling coastal mountains near this Mediterranean seaport a huge auto plant sprawls. The SEAT plant, which serves as the headquarters of Spain’s only domestic automaker, makes four different models, three under SEAT brand names and the Audi Q3, which is part of the family of cars produced by Volkswagen of Germany, which acquired control of the Spanish company in 1986. Most of the plant’s production is bound for export markets in Europe, Asia and Latin America.