Why you should lock your car doors?
Also to know is, why is it a good idea to lock your doors while driving?
"There've also been incidents of forcible confinement — where a person enters the vehicle while you're stopped or driving slowly in traffic and takes over." It's a good idea to drive with doors locked, police say. "In the event of an accident where air bags are deployed, the door locks will unlock automatically."
Similarly, why you should always lock your doors?
The whole purpose of locking doors is to protect not only yourself but also the valuables in your home. While burglars don't necessarily target homes of high value due to the likelihood of security features, the more one spent on their average monthly rent or mortgage, the more often they locked their doors.
It will not lock by itself if you exit the car and walk away. HOWEVER, if you unlock the car and don't enter it(open a door), it will relock in about 30 seconds. That's the only thing it does automatically.