The S is to the XF what Mercedes’ AMG E53 is to the regular E-Class. A more powerful variant with sportier characteristics, the S gains bigger wheels and unique styling cues, as well as more supportive front seats. Numerous badges also feature inside and out to help tell it apart further. Besides a large increase in power and a much higher price tag, the S model also adds more standard safety features. Lane-keep assist, active blind-spot monitoring and rear cross-traffic warnings systems, as well as forward-collision warning and prevention with automatic emergency braking, are the stand-out features included as standard here.