Dean and Allyson Rogers park their 1955 Mercedes-Benz 300SL Gullwing in front of the Longhorn Grill during a rest stop.Howard KobyVintage Roadcar Articles August 1, 2016 0Copperstate 1000 Access to the full article is limited to paid subscribers only. Our membership removes most ads, lets you enjoy unlimited access to all our premium content, and offers you awesome discounts on partner products. Enjoy our premium content. See Membership Options