As I am going through the B Max's Owner Manual I notice when I compare the Vehicle Menu in the manual and the Vehicle Menu in the car they don't always match. Now I understand that if you don't have an item it won't appear in your menu. I noticed that in my Vehicle Menu the Rain Sensor sub-menu is missing. I assume this menu is used in conjunction with Auto Wipers which I have. Does anyone have this menu, and if so, what is its purpose? I think I read somewhere it is used to set the wipe interval. Appreciate any info.