The GTi has electronic 'eyes' that use radar and laser sensors in the grille to 'read' the road and send the details back to its computer brain. A sat-nav system tracks its exact position with pin-point precision to within an inch. The car can then work out the twists and turns it has to negotiate - before setting off at break-neck speed through a laid out course on a test track. On a race circuit, it drove itself faster and more precisely than the VW engineers could manage - and can accelerate independently up to its top speed of 150mph.
To prove it is no trick, guests were invited to design for themselves a variety of different courses - using road cones - and then watch the car fly around them on its own at a test track near their world headquarters in Wolfsburg in northern Germany.