A while back, Mini was using the image of a Mini-based Transformer robot in billboards and online. You can still go see it at their website if you click on Build Your Own>Robot.
But now there is a Citroen ad that takes the idea and goes one better--a fully animated, dancing Citroen Transformer. As if that's not enough, it even transforms using the same method as most of the Autobots: split rear half becomes the feet, front end becomes chest, rotate 180 degrees at waist so that all the recognizable car parts face front. After the Mini ad, maybe it's not so original, but big points for follow-through.