Automotive apps are all the rage, but it's a special kind of car that gets an app all to itself. The luxury 2012 Mercedes-Benz CLS-Class four-door coupe is just such a car, and a free app available through the Apple App Store allows owners and potential owners to access information about the car through their iPads. Information available through the app includes vehicle data with associated images and videos, as well as virtual tours taking you around the interior and exterior. An "Explore" option allows users to customize a CLS to their tastes. The app is the first in a series of 2012 model...