Despite standing untouched for 60 years, the S-Type Mercedes-Benz still runs perfectly.
It was one of the world’s fastest cars when it rolled off the production line in 1928, reaching 100mph comfortably.
The car has stayed with the same family since new – but was parked in a lock-up in the 1950s and has never been driven since.
With its Ferdinand Porsche designed engine, the S-Type was one of the earliest mass produced luxury sports cars.
Collectors hailed the battleship grey convertible as ‘an incredible find’.
Automotive expert Rupert Banner said: ‘It has literally been off the radar. No one knew such an untouched and archaic vehicle this old existed.’
The unidentified owner’s grandfather was one of the earliest buyers of the car, having purchased it from The British Mercedes Ltd in London.
Its bodywork was crafted by London-based coachbuilders Cadogan Motors and its original blue upholstery is still intact.
It is set to go under the hammer at Bonhams’ Goodwood Revival sale on September 15./metro.co.uk/