This 1952 Mercedes-Benz 300 S is one of 203 examples built with Cabriolet A coachwork during three years of production and was invoiced to its first owner in Coahuila, Mexico, on December 5, 1952. Beginning in 1961, the car passed through a series of Mexico City owners, including a 16-year span under the stewardship of architect Francisco Artigas…