Really, there's not a great deal of new stuff here. Based on the number plates, this is a different vehicle from the one we saw back in March, which we originally identified as the upcoming replacement for the Land Rover Freelander/LR2. The details, though, appear largely the same. The biggest distinction we can see between the March tests and this are the US-spec headlights, which add amber reflectors at their sides. Based on these shots, it does seem as if the C-X17 should be a fairly poised road vehicle, as the engineers hustle it around the 'Ring.
Of course, as soon our spies can capture images of a production-bodied C-X17, we'll be sure to pass those on to you. Until then, take a look up top for images of the Range Rover-bodied Jaguar as it tests at Germany's Nürburgring. You can also scroll down for our March images for the C-X17 mules testing on public roads.