nitro..... lol joking its when your car off you can change the gear by pushing that button
Ejecto seatoooooooooooo.....
Put your keys ion the ingnition (dont turn it on).
Then press the button, while holding the button in you can put the car in Lower gear without having to start the car.
It helps if your want to replace the radio etc and need some extra space.
Ejecto seatoooooooooooo.....