Wired.com has the behind the scenes on this DieHard Battery commercial featuring Gary Numan:
Over three days in the desert, a team of six engineers worked on 24 cars and removed the batteries from each. Instead, they connected them all together to a central computer and a keyboard. The horns inside the cars were removed and instead an MP3 player was used to tune it. The entire set-up was hooked to one DieHard battery.
Numan is playing his 1979 hit song “Cars.”