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.