I had a rattle coming from the centre vent area. I found this guide on the web.
http://forums.vwvortex.com/zerothread?id=2945481And stated to sort it out once and for all. I had got to step 3 and started to remove the indicated screw. I was using a magnetic torx bit holder, and started with the wrong bit, so pulled the bit back out...............
Imagine my surprise to find 2 bits on the magnetic holder, there was a T20 bit stuck to the outside.!! So when the dealer sorted out my radio last year, he left a torx bit in the dash!
So one bit up, and no rattle = Happy!