iMOTOR

Well, The Swiss auto powerhouse Rinspeed presents the ‘iChange,’ the world’s first car whose body adapts to the number of passengers on board. It's an electric powered concept car from nutty niche Swiss outfit Rinspeed. An iPhone is actually used to lock and unlock the doors as well as fire up the engine.
And at the push of a button the car changes shape, elongating mechanically from a two into a four-seater.