I have mine at 100%, no flickering at all but I also didn't see a difference between 100% and 75%. Also, I didn't notice a difference at all when just DRL's are one, seems this brightness change only affect the brightness when parking lights are on and/or headlights. Just the standard DRL's stay bright no matter what values I change it to... 10% or 100%. Only when I flip the dial into parking mode (activating the marker lights) that I see a change in those DRL's. Anyone else getting the same results?