[ajsnigrutin]

You might be joking now, but:

https://www.ebay.com/p/20004588697

[seoulmetro]

I drove a 40+ year old car for a while and it had one of these. Great feature, except that in old cars they always need to be at max these days due to all the street lights, etc.

Now it's been replaced with headlight moving knob in newer cars, which is more awesome.

[stirfish]

My panel brightness knob is also the button that resets the trip meter.