The Lamborghini Concept S is a concept car based on the Gallardo, featuring a speedster (Barchetta) body designed by Luc Donckerwolke. It was built in 2005 and was first shown at that year's Geneva Motor Show. The Concept S was intended to be a modern interpretation of the single-seat roadsters of the past. Utilizing a 'saute-vent' (French for 'change wind') instead of a traditional windscreen, and dividing the interior into two distinct compartments by continuing the bodywork between the seats, which also serves as an air inlet feeding the mid-mounted 5. 0 L V10 engine, giving the car a distinctly futuristic look along with increasing aerodynamic flow. The rear-view mirror is even electronically retractable to allow the driver to see behind, when necessary, or to retract it into the dashboard when not needed. Though considered more of a styling exercise than a working production vehicle, the final working show car only had to be modified slightly from the original computer-aided designs. Lamborghini was rumored to be building 100 examples for customers but decided to keep it as a styling exercise. Only 2 cars were produced: the high-window prototype sits in the Lamborghini museum with no engine, while the running low-window prototype featured at Pebble Beach was up for auction on 10 December 2015 at RM Sotheby's Manhattan event "Driven by Disruption". It was expected to sell for US$2. 4 to 3 million, but failed to sell.