Popular Science is claiming the new M3 is the first car ever with an easter egg.. hmm.. I would say our handbrake/ABS trick would qualify as an easter egg.. I'm sure there are many other cars with hidden tricks over the years.
http://www.popsci.com/popsci/auto/article/0,12543,358540,00.html
http://www.popsci.com/popsci/auto/article/0,12543,358540,00.html
