pimp my roc wrote:go on then!!!!
I found the wipers would rattle even when the car wasn't moving but in gear, so if you park up, start the engine, move it to D leave the handbrake on but release the brake, at this stage the car wants to move forward but can't but the gear is now engaged therefore its rev-ing a lot more to keep the bite - Do not press the accelerator.
If you hear the rattle, ask your other half/friend/neighbour to push down on the wiper (outside) or if you can't find anyone to assist. Turn the engine off, turn the key 1 one, push the wipers leaver down once, this will leave them open for cleaning, then start your car and repeat the steps above.
If you still hear the rattle then it's something else, what makes you think its the pan sunroof?
Remember you can only test the wipers if you hear the rattle if it only occurs when moving try turning the wipers on then and see if it makes a difference. I found that leaving it in D didn't always replicate it, depends on how you parked up (i.e. if its half on the kerb then there will be less vibration)
That's the best way to describe how to investigate the wipers issue, if you have any questions then please let me know and I'll try to help as much as I can.
I too have the sunroof but nothing led me to believe the rattle was coming from that.
It may not just be the cold weather maybe an issue with the way they are positioned on the windscreen - the VW service centre said, if there is an issue with them then VW should cover it under warranty but they would need to investigate it first.
I tell you something though its f*cking annoying when it starts happening.