US automakers Ford and Chrysler recalled on Friday hundreds of thousands of vehicles, most of them in North America, to fix faulty software and mechanical problems.
General Motors' Chevrolet unit swept car and truck of the year honors but Ford's use of aluminum in its F150 sparked new debate on the first day of the Detroit auto show Monday.
Shares in Fiat soared on Thursday after it announced it would take full control of Chrysler, with optimism for the historic deal's potential outweighing concerns over its cost.