DETROIT — Saturn will launch a line of hybrid vehicles to be called the Green Line Series starting in mid-2006, according to www.Edmunds.com/. The first model will be the 2007 Vue Green Line SUV crossover outfitted with a stop/start device that shuts off the engine at stoplights to conserve fuel. It will have a so-called “mild” hybrid system, yielding roughly a 10-percent savings in fuel economy, compared with the Vue’s conventional gasoline engine. The EPA’s fuel economy guide says the 2005 Vue with front-wheel drive gets 22 miles per gallon in city driving and 28 miles per gallon on the highway. The Vue Green Line will be joined by another unnamed Green Line vehicle. The pair will be sold alongside Saturn’s new eight-passenger crossover vehicle, which will be called the Outlook. The Outlook, like the upcoming Aura mid-size sedan, will be a 2007 model. The Green Line name is a takeoff of Saturn’s current Red Line performance variants, which include the Ion Red Line and the Vue Red Line.