A 1938 540K Cabriolet is to cross the block of Bonhams' Mercedes-Benz auction in Stuttgart on March 28 with a valuation of $2.2m-2.8m.

The 1938 Mercedes-Benz 540K Cabriolet was built as a lighter version of the 500K

Very few were ever built, making it one of the most desirable cars of its era. The auction will feature other rare examples from the marque, including a 1960 300 SL Roadster.

Michael Bock, head of Mercedes-Benz classic and customer centre, commented: "Unique and authentic vehicles - that is the idea we share, both Mercedes-Benz and Bonhams. Originality plays an important role in our philosophy."

"After the successful auction last year we will once more offer an appropriate stage for Bonhams. Classic car collectors and visitors of the museum will once again be given a taste of exciting auctions."

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