I want to give everyone a heads up. We have seen several water pump failures on the new TSI motor. These failures are occurring on low mileage unmodified TSI's.
It sounds like a failing idler bearing but the sound is coming from the right side of the motor. If it's failing you will be able to hear it fairly easily. Although this is not a very technical explanation, it does sound like some sort of animal is in the engine.
To isolate the sound, you can take a long screw driver, place it on the pump housing and hold it to your ear similar to a stethoscope. To get the screwdriver to the pump, you can stick it though the right of the intake manifold between the runner flap actuator and the manifold.
The dealerships in our area have seen a lot of failures and had lots of new pumps in stock.
The pumps have been superseded by a new part number with a new bearing: 06H 121 026 AF
I'll do a photo 'DIY' diagnosis, removal and replacement on the next one we have in house. I'll update this thread if I find a TSB for the issue.