As far as I know the 1.2 TSI has a water cooled charge cooler..........
Yes, that's right; cooling water flows around the turbo and through the air/water intercooler to cool the air before it enters the engine. The water then flows through a radiator at the front of the car (separate from the main one AFAIK). It is pumped round by an electric pump which is switched on and off, mainly to control the intake air temperature. In some cars (including mine) you can hear the control relay clicking as the pump is switched on and off.
Before changing all that you'd need to show that this system was incapable of cooling the intake air adequately.