I had the exact same issue,and believe it or not the sensor was picking up the number plate,which by complete fluke I found and sorted without taking it to the money grabbing main dealers
Injectors need cleaning and a new seal needs applying and will be good to go. providing your aren’t getting smoke from the exhaust it’s just a small issue.couple of hours work max
Hi it may be worth looking at purchasing the obd eleven vag as I know you can alter the lighting with that app.whether you can adjust the drl with the 2015 I’m not sure.ive owned my a7 bitdi for almost a month now and i love it.what a beauty of a car.ive been looking at car play and from what I’ve seen they’re all very similar in the way they work and install and cost.About £450 will get you the kit