I don't know about the 08+ cars, but on the 04's, all trims shown as remote start 'ready' just needed the right keyfobs and some dealership reprogramming to enable the feature. The existing keyless receiver and other hardware were already all in the car.
By pressing a button on the key fob, the remote start system starts your parked vehicle. Great for pre-warming or pre-cooling your vehicle. Seamlessly integrated with your vehicle's anti-theft and remote keyless entry systems.
It is the same key fob that cames with the pre-installed remote start. It states in the description that it will work!