This isn't actually my belief, but I got someone else to believe that the little bumps that are on the buttons on the steering wheel are brail for blind people to use.
A childhood belief about cars

others believed things like this
- I used to think that drivers accelerated by turning the steering wheel.Anon
- Because of cartoons, I thought that to drive you'd just turn the steering wheel back and forth constantly. — Mitsuki
- When my wife was a kid, she used to think that highway speed bumps were for the blind.Anon
- I once thought that there were little mice under the wheel on Wheel of Fortune making the wheel move— Kara
- I used to belief that women had babies by pressing their belly buttons!— amy
- My older brother told me that speed bumps were really dead people covered in cement.— Trina