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Mercedes F125! concept hints at electric S-class

Here's a riddle for luxury automakers: How will big, high-powered cars fit into a world that's greener, more congested and more tightly regulated than today? Mercedes-Benz rolled out one possible answer here last month with the F125! concept car.

Reuss: GM considering 'something really fun' for Buick

Buick dealers still salivating over the Riviera concept that General Motors unveiled at last month's Shanghai auto show should take a deep breath: There's little chance that the flashy coupe will ever grace a Buick showroom. But they should view the Riviera -- which GM says points to the brand's design direction -- as a signal that GM is serious about adding pizazz to the Buick lineup now that the 110-year-old brand, which barely survived GM's bankruptcy four years ago, is getting comfortable in its born-again skin. "We've very carefully built Buick back to a brand that has respect," GM North America President Mark Reuss told Automotive News.

Lamborghini Aventador Roadster takes to the air(strip)

Lamborghini kicked off its 10-day Aventador LP700-4 Roadster media launch and dealer-education program on Monday, and it started off with a bang. Actually, with a roar. Five new Lamborghini Aventador LP700-4 Roadsters took to the south runway of one of the busiest United States airports for a photo shoot, some video and some fun.