I have a 2009 convertible 650i automatic. I was driving for a while yesterday and then I was in a line for a drive-through for about 20 minutes with the car on. The fan came on which to me sounds louder than any other car that I've had in the past but I don't know if this fan is normally supposed to be loud anyway. After a little while I got the error message that shows there. I'm not a mechanic and I'm going to take it to a mechanic, but I wanted to find out if there was anything that I should do in the interim to make sure that nothing happens while I'm getting to the mechanic. Also, what are the things that I should be looking for so that the mechanic doesn't screw me over in some way?