What do i need to remove to gain access to the turbo?

Also, my car is now at around 130000 KM (about 80000 miles), do you think i need to service my turbo anytime soon?

What is a good source for rebuil K03 or even K04? Or used?

 

Removing the airbox can make working on the turbo much easier. You really dont need to service a turbo. It either works or doesnt. I would wait untill it fails and then either replace it or upgrade. Theres a million sources on the net that can do either for you.