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For new CAFE rules, automakers place high-stakes tech bets

Game-changing 2015 fuel economy rules are forcing vehicle development teams to make high-stakes bets on expensive technologies--bets that will separate the winners from the also-rans. Not only do federal rules target a 2015 fleet average of 35.5 mpg, up from the current 27.5 mpg for cars and 23.1 mpg for light trucks; they force automakers to bet on different technology packages for each vehicle segment. Companies that do best at mixing technologies while keeping down costs will have an advantage when buyers wince at higher stickers.

First Fiat 500s will have stick shifts

The 2012 Fiat 500 , heading to U.S. dealerships later than first expected, is enduring another hiccup: The first units arriving in dealerships in late February will have manual transmissions, the company said. Moreover, only about 20 percent of the 130 Fiat dealerships will be open when those first cars arrive, said Laura Soave, head of the Fiat brand in North America, at the Detroit auto show last week.

Whitacre leaving General Motors

UPDATED--Ed Whitacre is stepping down as General Motors Co. CEO on Sept. 1.