Photo: Pebble Beach Concours d'ElegancePebble Beach, CA -- A 1938 Mercedes-Benz 540K Autobahn Kurier claimed Best of Show honors in a field of 230 cars at Sunday’s Pebble Beach Concours. The event marked the conclusion of Car Week on the Monterey Peninsula.Owned by Arturo and Deborah Keller, the car’s win...