So today I was driving in some heavy rain in my 2011 528i and a "fog light malfunction" warning popped up. I did not have my fog lights on at the time the error message occurred. It lasted about 20 minutes and then dissapeared. I later stopped and turned on the fog lights and they were illuminated properly. Has anyone else had this happen? Any ideas as to why this message would randomly come up and then dissapear later? I haven't changed any of my bulbs recently. Thanks.