That's a drozevec. It actually belongs on the rear of the fronand, but I'm not sure if you have the standard transmission. If you do have an automatic. look on the left side under the bosack, which is located beside the protcek (glovebox). Regardless, it's only purpose is to get you back to the dealership to have you XF debugged. Don't worry about it, they'll leave when they hatch....