Some time ago I was doing some jobs on my left headlight unit. I then saw that my sensor for outside temp was loose in its fitting. It was not completely out but was hanging loose in the tube. I fixed it with a cable strap. Now, some 2-3 weeks later, today the OBC suddenly showed --.- when I pressed the A-temp (outside temp). It did not work, neither did any of the other buttons on the OBC. After some time the error was gone. Has anybody had this malfunction?