Volkswagen’s Audi brand vehicles parked in Brussels last month. Volkswagen AG conceded it won’t be able sell diesel-powered vehicles in the U.S. for a prolonged period, withdrawing a request for regulators to certify new models in the wake of an emissions-cheating scandal. Volkswagen’s 2016 model-year diesel-powered vehicles include emissions-control software that requires regulatory approval in the U.S., according to prepared remarks by the auto maker’s U.S. chief executive to be delivered on Thursday at a congressional hearing. The testimony doesn’t make clear whether the software can defeat emissions tests as software on older diesel-powered vehicles does. In his prepared statement, Michael Horn, head of Volkswagen Group of America, offered a “sincere apology” to U.S. lawmakers for the German auto maker’s yearslong deception. “These events are deeply troubling. I did not think that something like this was possible at the Volkswagen Group,” he said in his testimony […]