Blenheim, Ontario, CANADA -- RM Sotheby’s recently announced additional featured entries for its 21st annual Arizona sale, set for Jan. 16-17 at the Arizona Biltmore in Phoenix.Photo: Darin Schnabel ©2020 Courtesy of RM Sotheby'sLeading the entries is a 1937 Mercedes-Benz 540 K Coupe that has remained in the same family’s...