Audi's A6 and S6 earn a 5-star safety rating from the NHTSA.
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Audi is the world's second largest luxury automaker, but it's hoping that's not the case for long; in an effort to catch BMW--currently the world's number one--the German automaker is investing $17 billion through 2016, according to a report in the SF Gate.
The 2012 Audi R8 is the automaker's supercar, and the R8 GT Spyder is a limited edition enhanced version of this already impressive car.
The 2012 Audi A8 is the automaker's flagship, and the S8 is the top of the performance-inspired S line which enhances already impressive cars.