I used to have a car (2011 Toyota Yaris) that had electronic headlight level adjustment with a knob on the dashboard. However, my 2016 Toyota RAV4 hybrid apparently has automatic adjustment, so there's no knob.
How can this automatic adjustment work? I mean, if it's based on gravity, the lights would be completely incorrectly adjusted if driving up or down a hill.
Is there some kind of level measurements in all four springs of the car, allowing knowing how much load the back wheels and the front wheels have?
If the automatic headlight level adjustment was non-operating for some reason, what could the cause be?