The last vehicle made by GM's Holden unit rolled off a production line in Australia on Friday, bringing decades of car manufacturing in the country to an end.
Nissan has suspended production of cars for its home market over safety concerns.
The European Union is set to introduce new CO2 emissions standards in November.
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Mercedes-Benz will spend $1 billion to upgrade its production capabilities in Alabama and jump-start its electric vehicle program in the U.S.