Lexus started 2015 by redesigning their best-selling IS 250 compact sedan, offering updated interior and exterior enhancements, improved cabin room, more trunk space and better steering and tuning as well as new safety features. The ES 350 rolled onto showroom floors with standard HID headlamps and new NuLuxe upholstery. Meanwhile, the Siri Eyes Free iPhone integration was added to most vehicles in the lineup. An eight-speed automatic transmission with paddle shifters was added to the GS 350, while the GX 460 got a new exterior style with LED head lamps and fog lamps, a new touchscreen interface, trailer sway control and collision mitigation system. The RX 350 got a new collision mitigation system as well as a new rear 15-volt power, as did the RX 450h.