In every car I’ve ever tested this on, pushing the seek button jumps the tuner ahead until it reaches the next coherent radio station. But if you push it too fast, the tuner resets to where it was when you started.
However, you can push the Tune button as fast as you want and it doesn’t reset, but it always moves in increments of 0.2.
What is the purpose of such weird settings? Why even have a Seek button in the first place, and why does it reset when you push it fast?