So it seems like the dimming and brightening only happens when the headlights are on. Its been cloudy so I still can't say if that's a contributing factor
Thank you all! To my knowledge the lights are fine and working as they should. It was cloudy and pouring the day I noticed it and I was wondering if that was related. There are no items on the dash. I too saw a thread suggesting that it's a feature. I'll see what happens when my lights are not in the auto position and report back.
So it seems like the dimming and brightening only happens when the headlights are on. Its been cloudy so I still can't say if that's a contributing factor