As I said, they would be able to buy them - although for a higher price than that of a locally produced car, because of the import tariff.
No, because under my "scheme" this stuff would still be exported: Simply because producing something in one country only doesn't rule out exporting these products to all other countries. And patents on medicine? Under my "scheme", all patents on medicine and other health-related goods would become
CC 'd immediately, so that each and every pharmacy company could produce their "generic" counterparts without judicial hassle.
Anyway, I just heard on the radio that PSA plans to cut the staff in the Opel factory Rüsselsheim down to half its current number.

Under my "scheme" of a heavily controlled market economy, this would be impossible: Either the owner keeps all employees, except those they have a valid reason to get rid off (and it's not up to them to decide which reason is valid, but up to unions and state) -- or the factory will become 100% state-controlled, and the employees can return to their working places anyway...