What car was unveiled in autumn of 2007 at the Frankfort Motor Show as a replacement for the Jaguar S-Type?
Jaguar C-XF: The Jaguar C-XF (for Concept-XF) was a concept car that was designed to showcase the preliminary styling cues of the yet to be announced Jaguar XF. Jaguar C-XF:  The C-XF was unveiled in the 2007 North American International Auto Show with the production XF announced in the autumn of 2007 at the Frankfurt Motor Show. Jaguar XF:  It was first unveiled in autumn 2007 as a replacement for the Jaguar S-Type.
Jaguar XF