There are many reasons for removing the turbo on your GTI Mark 4, from replacing it to upgrading to a larger turbo to give the engine more power. It is not a quick or easy job, but can be done by a DIY mechanic if you take your time, have the right tools and follow the instructions. This job can take a while for a novice, so make sure you have the car in a secure and weather safe area before you start.
I can not stress this enough: get a digital camera and take lots of pictures before and during this job, document wire and vacuum routing plus anything you feel unsure of, this can only help when it comes time to put everything back together.
There are several steps that need to be preformed on other parts of the car before you begin removing the turbo. We have covered all of these in separate articles so I am not going to include them here, as this will be a long enough project as it is. Please refer to all the prep work articles contained here on Pelican Parts.