Hi , I recently purchased a 2018 a6 avant with the tour pack. One of the options within the pack is the high beam assist, which according to various websites is a sensor behind the rear view mirror. However I haven’t got this but when I switch the main beam on I do get the auto underneath the symbol. Just wanted to confirm if this is indeed correct as confused how this is working , I’m assuming it’s using the camera , however why does all the sites mention a sensor . I have attached a photo of what sites mention is used for the main beam assist and circled this which again as mentioned I haven’t got. Thanks In advance Mark