Audi 'TDI injection' by Bartle Bogle Hegarty

Audi ... promotes fuel injection technology
Audi ... promotes fuel injection technology

Audi has followed its "we've unboxed the box" campaign with a TV spot promoting the fuel efficiency of its cars.

The 40-second ad, created by Bartle Bogle Hegarty, uses images of droplets of liquid passing through the eyes of needles to visually represent its TDI technology.