The whimsical but surprisingly dark world of Rube Goldberg machines
theverge.com
theverge.com
http://en.wikipedia.org/wiki/W._Heath_Robinson
I had to look up Rube Goldberg when I started getting exposed to more US culture. But it has a direct translation into UK culture, W. Heath Robinson had a similar reputation for drawing absurd, complicated machinery.
"It was also the era of increasing automation, and increasing concern about automation, exemplified in Charlie Chaplin’s 1936 masterpiece Modern Times. One of the film’s dystopian curiosities, the Billows Feeding Machine, invented by Mr. J. Widdecombe Billows, has a distinctly Rube Goldbergian quality to it — this is likely no coincidence, as Goldberg and Chaplin were friends. "The Billows Feeding Machine will eliminate the lunch hour, increase your production, and decrease your overhead," the film’s narrator announces. "Don’t stop for lunch: be ahead of your competitor." A factory worker is strapped into the feeding machine by his neck; the device malfunctions spectacularly."
It's still a cool vid tho.
Edit: Watched it again, it is clearly cg.
Edit: the part that tells me the most is near the end when they show the full console, and then the speakers on dowel rods.
I have also seen the 'making of...' short film about 'Cog' and that, too, confirms that CG was not used to create the machine. All the interactions between the car parts are genuine physical interactions.
I believe you're correct about post-production, though. It seems from the references in the Wiki article that the usual editing and manipulation took place, but none of that added any fake car parts or fake interactions.