S3 8p service requirments

Depends what was changed on the last service..
 
It should have had 3 services by now, so this will be its 4th which will be a major, unless its long life which it will be its second which also will be major with the additional of brake fluid, pollen filter (yes, this isn't changed in service) and haldex.
 
As above and if you have Stronic the auto box oil will be changed.