 Changes to the stock vehicle included low-mounted rear spoiler, increased power to by a remapped ECU, a modified air intake and exhaust system and revised supercharger settings.A special version of the XF Diesel S was announced in 2009 for the UK police car market, with the first police force orders in 2010.Its emergency vehicle equipment included a roof-mounted light bar with 3,600 light elements, side alley lights, blue and white strobing LEDs in the grille and blue flashing LEDs along the side of the car, blue and red flashing LED lights in the rear light clusters.