General Motors Co. may be the largest of Detroit’s Big Three, but it is the only one to not be represented on Automobile Magazine’s ‘2012 All-Stars’ list. The magazine, which ranked the 2012 Audi 7 the best vehicle of next year, feature vehicles from Ford Motor Co. and Chrysler Group LLC on the top 10 list, but left GM in the dark. Ford drove onto the list with its compact Focus, which was awarded car of the year by the magazine in 2000, and the highly-acclaimed Mustang Boss 302, which the magazine dubbed “the best Mustang ever.” January 2012 issue,...