And Williams told us: "Look - no hands! It's the first car in the world that lets you drive hands-free. It's incredible."
He climbed into the hot seat at Vauxhall parent company General Motors' development centre in Frankfurt, Germany. The technology is officially called the Innovative Driver Assistance Programme - but if it sounds dull, the car certainly is not. Lasers in its headlights and foglamps, plus a camera in the rear view mirror, 'read' the road 150 metres ahead. The camera detects the white lines and feeds the data to a 'brain' in the boot which instructs a motor to operate the steering, while the lasers gauge and maintain a safe distance from other vehicles.
As the lead car on GM's test track pulled off, so did the Vectra, holding a 25-metre gap through a twisting course, the steering wheel moving on its own. And in a stopping test, the driver in front hit the brakes, and the £1million car pulled up with room to spare. GM says the package will go on sale after 2010, adding up to £1,500 to a Vectra's price.