OP, make sure you have have everything in writing and pics when you return and make them sign for a copy. Make sure you make note of the time you called them after the pick up of the car. However, I'm sure they will claim you must have done something to the car after you left the dealership. Either way it's documented for BBB.
2011 Shelby Convertible w/SVT Performance & Electronics Packages
2011 Shelby GTS V6 Convertible, AT, CAI, Aluminum DS, 3.73, Tune