The wagon has, in the past, been a vehicle for lower and middle classes. Affordable cars get made into wagons, and luxury cars don't. The SUV craze nearly killed off the wagon, but it's clearly back with a vengeance. Not only were there Mazda6 and Ford Mondeo/Fusion wagons on display at the Paris Motor Show, but Mercedes showed off the wagonized CLS and Porsche stunned the world with the Panamera Sport Turismo.