Rare 1929 Mercedes become world's second most expensive car Fri Sep 3, 5:38 PM ET LONDON (AFP) - An ultra-rare 1929 Mercedes has become the second most expensive car the world has ever seen after selling at a British auction on Friday for 4.18 million pounds (6.16 million euros, 7.43 million dollars). The 7.1 litre SSK sports car -- bought by a collector in 1941 for just 400 -- was sold to an unidentified European phone bidder during the sale in Sussex, southeast England, auctioneers Bonhams said. The Mercedes, in near-original condition, was one of 38 cars discovered in barns...