Cadillac's 2013 ATS sedan, the smaller sibling to the CTS, is anything but a secret at this point. In fact, the company has just loosed another video and a set of exclusive photos to document the ATS's testing at the Nurburgring.

Check out the video and gallery for a peek inside the testing and validation process of the new smaller luxury sedan's performance tuning. You'll see some fast driving, hear the engine at full song, and see some early bits of the car's interior--it's our best look at the car to date. If it's just not enough for you, relax, there'll be more coming: a full web series of videos will be making its way to Cadillac's Facebook page soon.