I was wondering if someone could point me in the direction or explain to me what the differences are between the years from the 2006 models up to the 2009 models of the IS250. What packages did they offer and what did the packages include. Im looking at purchasing a 2007 IS250 AWD and would like to know what my options are. Did the 2007 come with HID headlights? Any help would be greatly appreciated.