1935 Mercedes-Benz 500 K Offener Tourenwagen
- Colour
- Medium oak green with tan leather interior and green canvas top

One of only 16 Offener Tourenwagen bodies built on the Mercedes-Benz 500 K chassis, this four-passenger open tourer — chassis 123724, engine and body numbers matching — was delivered in Munich in November 1935. Discovered on a Munich used-car lot during a 1951 honeymoon trip by American collector Dr. Ralph W.E. Cox, it subsequently spent decades on display in two American museums before passing to the present owner. A comprehensive professional restoration returned it to concours condition, and the car has since earned class and Best of Show awards at major American concours events.
Ownership
- —Auction saleSold US$1,540,000
- → 1951Acquisition unknownMr. Unholzerpartial documentation
Munich-based owner from whom the car was purchased off a local used-car lot in 1951.
- 1951 → 2014Private saleDr. Ralph W.E. Coxpartial documentation
American collector and aviator who acquired the car while on honeymoon in Munich, shipped it to New Jersey, later displayed it at his Frontier Village Museum and subsequently at the Museum of Automobiles in Arkansas. His son carried out a primarily cosmetic restoration in the early 1990s.
- → 2014Acquisition unknownMuseum of Automobiles, Petit Jean Mountainpartial documentation
Arkansas museum where the vehicle was on long-term public exhibit after being transferred from Dr. Cox's New Jersey museum; the car was ultimately sold by Cox's heirs from this institution.
- 2014 →Private saleCurrent consignorpartial documentation
Acquired from Cox's heirs in early 2014 and commissioned a comprehensive mechanical and cosmetic restoration by Mercedes-Benz specialist Jim Friswold, finishing the car in medium oak green with tan leather and green canvas top.
Competition
- 20162016 Pebble Beach Concours d'EleganceClass award
Car was shown selectively by the consignor following restoration; received a class-level award.
- 20162016 Forest Grove Concours d'EleganceBest in Class and Best of Show
Served as the official poster car for this event and swept the top honors including Best of Show.
Maintenance & restoration
- —Restoration
A restoration carried out by Dr. Cox's son, described as largely cosmetic in scope, leaving the car in fundamentally original condition including what was believed to be its 1936 leather interior.
Work completed in the early 1990s; subsequent assessment found the underlying car to be largely unmolested.
- —RestorationJim Friswold
A thorough, ground-up restoration performed by a noted Mercedes-Benz specialist, finishing the car in medium oak green over a tan leather interior with a matching green fabric hood. Original identification stampings and period fittings, including Bosch lighting equipment and a Munich-made Hopako trunk, were retained.
Commissioned by the current consignor following acquisition in 2014; the original engine number tag, stamping, and body number stamp were preserved in situ.
Are you the owner of this car?
This car's public record is built from its auction and competition history. Register your ownership and privately add your own records to make it a verified Legacy Metrics passport — provenance that backs your car's value at sale and gives your insurer evidence to price against. Roy reviews and verifies every registration personally.