For Sale: 2015 Airstream Grand Tour, Silver Exterior, Lt Camel Interior With Black Ultra Leather, Rear And Sliding Door Screens. Class B / Thornburg, Va 2015 Airstream Interstate Grand Tour Ext Bringing The Best Qualities Of A Classic Airstream Travel Trailer To The Popular Airstream Interstate, The Grand Tour Series Offers All The Amenities And Comforts Of A Home Away From Home With The Quality, Easy Maneuverability And Convenience Of Airstream And Mercedes-benz.