How do you get the head light washer to come on? I have an 05 x5 and it has this S (stands for special?) symbol on the wiper controls, and i thought hitting that will force the head light washer to come on. I tried that but only the windsheild wipers cleaner came on and does its preprogrammed dealio. Do i need to be in drive mode for this to activate the headlight washer as well? Or how in the world does it come on?