From my handbook:
Every 12 months your car requires an inspection Service
Which always includes an Oil Change Service as well.
However if your car completes
15,000kn (10,000 miles)
before the end of the 12-month period it must be taken for an Oil Change Service.
If anual mileage exceeds
30,000km (20,000 miles),
the inspection Service must be carried out for every 30,000 km (20,000 miles) instead of once a year.
Every 24 months, the brake fluid must be changed.
Oil Change Service
:arrow: Engine oil changed, oil filter renewed.
:arrow: Brake pad thickness checked
:arrow: Service indicator reset.
Inspection Service
:arrow: Engine oil changed and filter renewed
:arrow: Engine checked visually for leaks
:arrow: All components that influence exhaust emissions must be checked
:arrow: Exhaustsystem checked for leaks or damage
:arrow: Concentration of antifreeze in coolant checked, coolant topped up as necessary.
:arrow: Data stored in fault memory of self diagnosis systems checked
:arrow: Brake pad thickness checked
:arrow: Brake system visually checked for leaks or damage
:arrow: Brake fluid level checked depending on brake pad wear
:arrow: Gearbox final drive, C.V. joint boots visually checked for leaks or damage
:arrow: Steering knuckle ball joint sealing boots checked for leaks or damage
:arrow: Tread depth and wear pattern of all tyres including spare checked. Tyre pressure checked as necessary.
:arrow: Battery acid level checked and topped up with distilled water as necessary.
:arrow: Trackrod ends checked for play and looseness: sealing boots checked.
:arrow: Door arresters and lock cylinders lubricated.
:arrow: Door locks, locking knobs and child safety locks checked
:arrow: Lighting turn signals, hazard warning lights, dashboard warning lamps and horn checked.
:arrow: Windscreen wipers and washer, headlight washer system (if fitted), washer nozzles and park position of wipers checked and adjusted as necessary, washer fluid topped up as necessary.
:arrow: Service indicator reset.
:arrow: Road test final check.
Work carried out every 30,000 km (20,000 miles) in addition to the Inspection Service
:arrow: Dust and pollen filter/pollution filter for vehicle interior renewed.
:arrow: Guide rails for sun roof cleaned and sprayed with silicone lubricant.
:arrow: Manual gearbox final drive oil level checked and topped up as necessary.
:arrow: Headlight settings checked and adjusted as necessary
:arrow: Underbody sealant visually checked for damage.
:arrow: Oil changed in Haldex coupling (Audi TT Quattro only)
Work carried out every 60,000 km (40,000 miles) in addition to the Inspection Service and the 30,000 km (20,000 mile) service
:arrow: Air filter element renewed and housing cleaned
:arrow: Fluid level in power steering and central hydraulic system checked.
:arrow: Automatic transmission final drive oil level checked and topped up as necessary.
:arrow: Haldex filter and oil changed (I added this - it's not in the handbook but should be!)
Every 60,000 km (40,000 miles) or every 3 years
:arrow: Spark plugs renewed if car is run on unleaded fuel. If leaded fuel spark plugs must be renewed every 15,000 km (10,000 miles)
Every 120,000 km (80,000 miles) in addition to the Inspection Service:
:arrow: V-belt and ribbed V-belt renewed (4-cylinder petrol engines, not for Audi A3)
Every 180,000 km (115,000 miles) in addition to the Inspection Service
:arrow: Toothed belt for camshaft drive renewed (5-valve per cylinder 4-cylinder petrol engines). (This is generally accepted to be very optimistic and it should really be changed at about 50,000 miles or if over 5 years of age.)
EDIT: Audi briefly reduced this period to 40k miles and 4 years. Copies of these letters are available. Audi later retracted this advice and reverted back to the original schedule. Some unfortunate people who have had their cam belt snap at 60k or 80k etc. miles have had a free replacement engine as a good will gesture from Audi. If this happens to you please ask!
From 1st August 2008 (last confirmed 4th January 2009) Audi CS are giving the following advice:
The early TT (e.g. APX engine) cam belt service interval is 120k miles or 5 years whichever is sooner.
All Audi vehicles later than 2004 year of manufacture, fitted with cam belts, are now recommended to have the belt changed at every 75k miles or 5 years whichever is sooner (but it was stressed that this only applied to vehicles manufactured since 2004).
It is worth repeating that the Audi advised service interval (especially for an ealy TT e.g. APX) is considered by many to to be too optimistic and that the cam belt should really be changed at about 50,000 miles or 5 years of age.
Additional work every 24 months
:arrow: Brake fluid changed (at same time as Inspection Service)
Additional work after 36 months and then every 24 months
:arrow: Emissions test.
Additional work after 14 years
:arrow: Airbag system renewed.