If it is round, it is probably the humidity sensor for your auto climate control.
There is a thread about changing this sensor with one that allows rain sense wipers AND auto climate. While you are at it, swap out your rear view with one that has the auto high beam camera.
I did the upgrade and used JScan. The menu on my 8.4 showed up immediately. Not working yet but going to let it rest over night. JScan - adaptation Radio user setting Rain sensitive wipers on/off Everything work out ok with it? Did you order part 68298334AA and did it come with the gel pack...
5thgenrams.com
Mine does that too, that may just be a safety feature that if you don’t have traction control AEB won’t work . (Maybe something about the tires needing traction control to stop correctly in an emergency )
5thgenrams.com