It's all quite odd. My French dealer has recently written to me advertising the Audi 'complementary' service at 90,000 kms (56,000 miles)
or 6 years for changing the timing belt and water pump. That is for a 2006 2.0l TDI sportback. His prices, including labour are Euro 638
for the belt, and Euro 831 for both belt and water pump (for reference). In the second case, his price also includes the antifreeze.
It's 80k and the water pump should be done at the same time. I got the belt kit, water pump, alternator belt and oil service for 400 quid. All oem parts and the garage is a highly recommended specialist