Allow the customer to turn on auto door locks on all vehicles

I had an automatic transmission Mustang and it always automatically locked the doors after driving.  I park in a dangerous city now with a manual transmission and I often forget to lock the doors.  Criminals possibly know what cars have auto lock and which don't.  It isn't too good.  I wish I could manually turn on auto locks.

I know for a fact that this car has the auto lock feature and Ford hard coded it disabled at the factory.  I wish there was some ecm update to turn it on because I don't like locking the doors myself all the time.  Why oh why doesn't Ford let the person whom purchased the vehicle do this is well beyond me.  You have to have someone hack away at the car and put in a third party alarm system to turn it on.  That isn't very appealing to me.