This is called the “mist” button, a dedicated button to operate the wiper exactly once, and every car I’ve ever driven had one. The button allows instant actua

This is called the “mist” button, a dedicated button to operate the wiper exactly once, and every car I’ve ever driven had one. The button allows instant actuation of the wipers. There are times when you can get hit with water or mud unexpectedly so it’s nice to have. Any other adjustment can be made at a pre-planned moment with a single tap on the touchscreen, similar to checking blind spots or such. Note that pressing “mist” also shows the wiper adjustment controls on the bottom-left corner of the screen, so you don’t have to swipe to navigate to them.