Chinese marques accounted for the bulk of sales as other international brands pulled out. Some, including Mercedes-Benz Group AG, Nissan Motor Co. Ltd., Hyundai and Renault SA initially had buyback clauses, according to the Russian government and media reports, which would theoretically allow them to reclaim plants at a discounted price. It will not be straightforward. The head of AvtoVAZ, Russia’s biggest car producer, has said that its former owner, Renault, would need to pay compensation of at least 112.5 billion rubles to cover the investment made since it quit Russia, if the French automaker wanted its stake back.