Mighty Mercedes-AMG GT S takes on Porsche

Mercedes may have covered its luxury bases at the LA Auto Show 2014 with the opulent Mercedes-Maybach, but there's plenty of performance on tap too from the new Mercedes-AMG GT S. The bright yellow coupe is rear-wheel drive and will hit forecourts in the spring of 2015, with Mercedes' sports division looking to take on Aston Martin, Porsche, and Audi …