Depending on how far you want to go, there are a few choices...
1- get the xenon adapter from kufatec, fit the lights and code the car to Xenon (without shutters)
2- get the xenon adapter with the shutter loom from kufatec, fit the wiring and the lights and code the car to Xenon (with shutters)
3- go the full way and install the auto levelling and headlight washer system, plus the shutter loom from kufatec and code the car to Xenon (with shutters)
'shutters' refers to the xenon high beam. On GTI xenon headlights, they have a halogen 'flash to pass' bulb and, if the headlights are on, a 'shutter' moves on the dipped beam which gives you a xenon high beam as well as the halogen high beam. If you dont wire the shutters in, youll just have a halogen main beam and wont benefit from the xenon high beam
The 2nd option is by far the easiest - thats what I have done on mine
In any case, youll need an adapter and youll need the car recoded to accept the lights