How to reset the service indicator:
Connect VAG COM tool.
Which will open this window:
Enter the appropriate channel number in the Channel number field. (charts below) It should give you a value in the stored value field. If not, don't worry. Enter the new value in the New value field. Remember that you have to use KMs, not Miles. Also, enter only the thousands. For 5000km, enter 0005. For 15,000km, enter 0015 and so on. Click Test. Then click Save, and you are done.
Then: (this depends on what year car you have:)
For 2000 on: