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Lutz's Cadillac puts on a better show than Lutz

"Hi, I'm Bob Lutz, and this is the Cadillac CTS-V Drive Challenge." General Motors Co.'s marketing chief dons his monogrammed helmet and puts Cadillac's 550-horsepower sedan through some warm-up laps at Monticello Motor Club, a members-only track. In what might have passed as a dismissible moment of Lutz braggadocio, "Maximum" Bob has challenged anyone with a four-door sedan to beat his 2010 CTS-V. Though not a showman by trade, Lutz is bankable for amusing, bald-faced assessments of his employer, his critics and the auto industry at large.

GM improves, Toyota slips as industry sales decline eases

Ford, Honda and General Motors posted their smallest sales declines of the year in April, while Nissan and Toyota had their largest, as the industry improved from depressed levels of February and March. Drops of 33 percent at Ford Motor Co. and GM were in line with analysts' forecasts, as was American Honda's 25.3 percent slide.

Mercedes-Benz E63 AMG wagon headed to North America

Mercedes-Benz officials confirmed on Thursday that the 2012 E63 AMG wagon will be part of the North American lineup. Slated to arrive in October, the high-performance wagon will get the same 5.5-liter twin-turbocharged, direct-injection V8 that debuted in the 2012 E63 AMG sedan at the New York auto show in March. It produces 518 hp and 516 lb-ft of torque.