The intervals on a tdi are as follows: (please note that Seat change there mind on a regular basis)
10k - oil change
20k - oil and pollen filter + brake fluid
30k - oil change
40k - oil change, pollen filter, air filter, fuel filter and brake fluid change
50k - oil change
60k - oil and pollen filter + brake fluid + timing belt and tensioner
70k - oil change
80k - oil change, pollen filter, air filter, fuel filter and brake fluid change
This time last year the air filter was supposed to be replaced at every 20k interval aswell as the pollen, the timing belt is now changed every 4 years instead of 6 (regardless of milage) and there is now talk of pollen filter replacement every 10k.