The United Auto Workers was one of Detroit's most influential players when that city was an industrial powerhouse. Now, the UAW's future may be at stake — in Chattanooga, Tennessee. For three days, employees in the Volkswagen AG plant have been voting on whether to establish a German-style works council. UAW president Bob King has warned that the union has no future if it can't organize in plants maintained in this country by foreign car makers. Dave Shepardson, Washington Bureau Chief for the Detroit News, is in Chattanooga to cover this week's vote.