mine has a sunroof which means no aircon right
Nope! mine has both! they were both options on the early GTI I think. I went and looked at a 1.8T the other week and it didnt have traction control or air con or sunroof.....
mine also has both and traction

there were both options through the life of the mk4 and become standard around 2002 time.
if you've got climate you'll know, air con is indicated by the A/C button under the middle dial