Rare Mercedes 540 K Roadster sells for more than £5million

An extremely rare Mercedes 540 K Special Roadster with an interesting wartime heritage has sold at auction for more than £5 million.

The 1939 5.4-litre model was offered by RM Sotherby's at its 2017 Arizona auction, which took place over January 19 and 20, and went to an unknown buyer for $6.6 million (£5.2 million).