BLENHEIM, O.N.- RM Auctions, the world’s largest collector car auction house, will celebrate the 125th anniversary of Mercedes-Benz at its Monterey, California sale next month by presenting the most important collection of Mercedes-Benz motor cars ever offered at public auction. The highly-anticipated two-day sale, scheduled August 19 – 20, will present 13 magnificent examples from the world-famous German marque, spanning over 80 years of production. Headlining the spectacular offering is an extraordinary 1937 Mercedes-Benz 540 K Spezial Roadster, chassis 154140 from the private collection of Sam and Emily Mann, recently displayed at the gala opening of Mercedes-Benz’s new Manhattan flagship store. One of just a select few built with the most desirable configuration of high door, long tail and covered rear spare, of which it is believed just three examples survive, the ultra-rare 540 K is expected to establi