Hi all, I'm currently looking a WM2 Caprice and recently took one for a test drive. One thing i noticed which bothered me was the rear demister light. Pressing the button to turn it on would make a little symbol appear on the display. But it would dissapear by itself about 15-20 seconds later. I think the demister was still running when the symbol was gone. (not 100% thought) Just wondering if this is normal or a fault.