interior's heated air with the outdoors. The solar roof was originally intended to assist in charging the vehicle's battery, but the system was configured to only power ventilation when it was found that the battery-charging configuration created electromagnetic interference that affected the radio. A new remote air-conditioning feature allows the driver to activate the air conditioner prior to entering the vehicle. Advanced Technology Package: includes the Navigation Package while adding a Pre-Collision System, Dynamic Radar Cruise Control, Lane Keep Assist and Intelligent Parking Assist. Plus Performance Package: announced in June 2011. This package includes a seven-piece body kit, 17-inch alloy wheels, special badging, and rear anti-sway bar. The car was also lowered by at the front and at the rear. Other options include Safety Connect, while LED headlamps come standard on the Prius V trim. In the U.S., the Environmental Protection Agency (EPA) tested the XW30 based on the revised 2007 testing procedures, resulting in the following scores: city driving, highway driving, combined. The Prius XW30 was the most efficient car powered purely by liquid fuel available in the U.S., based on the official rating. Only the discontinued first-generation Honda Insight attained higher fuel efficiency: (for manual/no air conditioner option). In the U.S., the EPA measures a vehicle's air-borne pollution based on hydrocarbons, nitrogen oxides, carbon monoxide, particulate matter and formaldehyde before assigning them a score. In most states, the XW30 Prius is rated Tier II Bin 3. In 2009, Toyota Prius experienced two consecutive year over year sales decrease to 139,682 units in the U.S., from 181,221 units in 2007. 2011 facelift In 2011 (for the 2012 model year), the third-generation Prius Liftback received modest style and equipment changes. The exterior changes included updated headlamps, revised tail lamps, and revised front fascia and bumper. The Prius could be equipped with an updated infotainment system featuring the optional Toyota Entune suite of connectivity features. Other updates included a 6.1-inch touch-screen, AM/FM CD player unit, a USB port for iPod connectivity, auxiliary input jack, Bluetooth hands-free phone capability and streaming audio. For the U.S. market, only the Prius Two, Three, Four and Five trim levels were offered. The Prius Two gained new 15-inch wheel covers and standard LED Daytime Running Lights (DRL). The Prius Three added a standard three-door Smart Key entry system, and the Prius Four featured standard auto on/off headlamps. The Prius Four also provided enhanced comfort with new