The A3 three-door hatchback unveiled here (the U.S. will get a four-door sedan version before 2014) will offer a slew of different engines, both gas and diesel, as well as automatic and manual transmissions.

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The trained dog reportedly sensed something suspicious about -- or near -- a vehicle parked close to the West Wing, and sat down beside the four-door sedan.

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Investigators are looking for an older-model, four-door sedan, either brown or silver, but it wasn't clear whether there were one or two suspects Thursday afternoon, Laney said.

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This fall, Saturn got the steak: a four-door sedan called the Aura that is meant to compete head-on with the passenger car leaders, Toyota Camry and Honda Accord.

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What's to be left seems to be the Mercury Milan, a four-door sedan version of the Ford Fusion, and the Mariner, the Mercury version of the Ford Escape SUV.

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More than 600, 000 visitors are expected to attend the six-day event, which includes 1500 automotive manufacturers and the announcement of 13 new models, including Porsche's first four-door sedan, the Panamera.

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For the uninitiated, a four-door coupe is essentially a sedan that adopts a sleek coupe-like roofline to afford a sportier appearance.

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Based on the A7, the four-door coupe pairs a 560-horsepower V8 engine from the S8 sedan with an AWD eight-speed automatic transmission.

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