I finally figured out what the problem was. Yesterday, I noticed my adaptive headlights were not working. Today, when I shut off my "automatic" fog lights, I thought things looked dark. I got out and looked and saw that my left headlight is out. Now it all makes sense. The car must sense the headlight out and automatically turn the fogs on to compensate.

What I don't understand is why it doesn't tell you that you have a headlight out on the OBC display or when you push the Check Control button. The vehicle is smart enough to tell you when it needs service, but can't tell you that your headlight is out. Doesn't make sense.