The dealer told me that my Acadia was equiped with autosending wipers. Meaning when it started raining they would turn on and wipe faster as it rained harder. I was unable to figure out how this worked or how to activate them. Can anyone tell me were the option would be located in the vehicle? Maybe I really don't have this option. He did make a point to say "Make sure you turn these off when you go through the car wash". Help please!