Hi all, I've just bought (today, not yet collected) an SLK with AMG bumpers and headlamp washers. When I tried to get them working, they wouldn't, with the main beam lights on of course! I checked behind the flap and the mechanism is there so they're not blanking plates. Does anyone have any experience of what the problem may be? Or is there are separate switch, something I'm doing wrong? Any help greatly appreciated. John