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 year apps due from Mercedes-Benz, all of which are designed to allow users on the move to learn more about the Mercedes of their choice.
A select few other automakers have been on the car-specfic app bandwagon for a while - Nissan lets Leaf drivers coordinate some of their car's functions via a smartphone app, and GM offers similar for the 2011 Chevrolet Volt.
We're expecting more and more carmakers to offer applications for their vehicles. They're not only a good marketing tool, but a useful way of allowing customers to interact with the products even when they don't have internet access or can't make the trip to a dealership.
In lieu of the CLS app, why not check out Motor Authority's preview of the car?