Our Audi dealership do the same and on the latest video the technician clearly says that brake wear is minimal and the pads have at least 80% remaining, not altogether surprising since the car has only done 16k miles. However the service reception sent a document in which they said that the car needed new front and rear discs and pads due to wear and that they would fit them for circa £1200! I strongly suspect that they thought that they were dealing with a female, non-technical owner since the car is registered in my wife's name. I declined their offer and resolved to watch them like a hawk in future. The dealership is part of the Lookers chain.