This year's auto show in Detroit could set the stage for a shake-up in the fiercely competitive — and hugely profitable — luxury car scene. That's because there's a new kid on the block, and its name is Cadillac.
The General Motors company says its new small, high-performance ATS will allow it to compete for the first time with Audi, Mercedes-Benz and BMW. But getting a brand-new luxury car like the ATS ready for market can be a grueling process.