When collectors descend upon California’s annual Pebble Beach Concours d’Elegance car show this month, all eyes will be on a prized 1936 Mercedes-Benz 540K Special Roadster. Up for sale as part of Gooding & Co.’s headlining auction, the vehicle, once owned by Prussian baroness Gisela von Krieger, is set to bring upwards of $10 million to realize a new record for the marque. Bidding begins August 18; goodingco.com