Sorry to rehash a thread I posted only yesterday, but I'm running out of time and my original title was vague!

Help, I need somebody, Help, not just anybody, Heeeelp!

In short. Can an Audi TT steering rack of similar year fit my 56 Plate 07 registered Audi A3 2.0 TFSI Sline Special Edition?
  1. Is it a direct replacement?
  2. Are there any additional parts or labour costs requried to do this?
  3. Any additional information I will need to have the discussion with the garage repairing my car?
Many thanks in advance to anyone able to help!