Possibly. When I had the belt changed in mine with the water pump about eight months ago, Audi did it. With labour and parts it was 700GBP. That included coolant and anti-freeze as the front of the car had to come off and rad came out.I've got 3.0TDi. Can't see why the rads need to be disconnected to change auxiliary belt. It's right at the front of the car, not much in the way.
2.7TDi same as 3.0TDi externally, just different bits inside for smaller capacity, less power.
Chris, think your neighbour's:
got a different generation engine
needs other work doing
got a creative quote!
We might be getting our names mixed up here. As the I think this is the timing belt that is changed at the front.