Maybe I'm moving fully into my Ed Asner stage of life, but I am concerned about running over people in parking lots. We have a 2006 Prius that generates a beep-beep-beep sound when backing up...except that it is only audible inside the car, not outside (go figure). We also have a MB B-class EV which is always in silent running mode (zero sound) when backing-up. The zero sound is very compelling, but seems a bit dangerous. Do any of you share my paranoia, and if so what are the possibilities for types of sounds, eg; I think they could be pre- programmed, or app accessed like ringtones, or no messing around just NTSB approved. I do favor the beep- beep-beep sound as it is universally known for backing-up. When backing out of a tight parking space at a grocery store with all ages wandering and darting about, it seems only prudent to give some warning to them while I'm concentrating on exiting and focussed on the front as well as the rearview camera. Any thoughts?