The future of Opel and Vauxhall remains unclear after a meeting between German national and regional government officials and General Motors’ vice president John Smith.
Various reports have said that GM is still interested in finding an investor for a controlling interest in its European division or that it would prefer not to sell.
The two bidders are Canadian car parts maker Magna and Belgium-based RHJ International.
Last Friday GM’s board of directors declined to endorse a sale to either.
Reportedly GM fears that a sale to Magna would mean some of its car technologies being passed on to a rival Russian carmaker linked to Magna’s partner, the Russian state-owned lender Sberbank.