Two of my obsessions are old Mercedes cars and the U.S. highway system— It was only a matter of time before these precondilections met, bonded over drinks, and decided to set out on an adventure: Portland (Oregon) to Portland (Maine) avoiding not just the interstates but freeways in general. Driving secondary roads in a 1977-85 Mercedes Benz diesel.* After getting the car serviced in New England, returning through Kentucky, Arkansas, Texas, and Oklahoma where my family lived