There are a series of switches that mean certain conditions must be met before you can shift the car
1) the key has to be in the ignition -or you can't shift.
2) the brake must be engeged, so there is a switch behind the brake pedal
3) the switch on the shifter has to get the information to release the shifter.
If any one of those conditions aren't met, it won't allow you to shift.
Woe to him who builds his palace by unrighteousness,his upper rooms by injustice,making his countrymen work for nothing...Does it make you a king to have more and more cedar?Did not your father have food and drink?He did what was right and just,so all went well with him. He defended the cause of the poor and needy,and so all went well...But your eyes and your heart are set only on dishonest gain,on shedding innocent blood and on oppression and extortion. Jer 22:13, 15-17