Hi thank you for getting back to me. I have a had the car to multiple garages and also have a tyre pressure gauge. The 100 miles is just to make a point. I can drive all day and nothing, then nip to the shop and it will come on. Or it will come on after 1,4,50 miles. There’s not a partern it just comes on whenever. They guys at Audi can’t even decide what it is. They even tried to bypass it so it just won’t work but couldn’t.