BMW has spent a low double-digit million euro amount this year to prepare for Brexit, Peter told journalists during a virtual roundtable discussion on Thursday.

"The auto industry association ACEA has estimated that it could cost carmakers and suppliers 10 to 11 billion euros," Peter said.

"We need tariff-free trade. And even then, it needs to be seamless. We have a just-in-time manufacturing system so the administrative processing at customs needs to be efficient."

Furthermore Britain should continue to keep pace with European Union emissions requirements so that carmakers can offer the same cars in all European markets, Peter said.

Strong demand for electric and hybrid cars has helped BMW stay ahead of projected fleet emissions reduction targets for 2020, Peter said.

(Reporting by Edward Taylor; editing by Thomas Seythal)