I've heard a very strange noise coming from my GTi recently, the best way to describe it is that when I was waiting in traffic (stationary) I thought the noise was coming from the the house next to me that was covered in scaffolding! It sounded like something hard being hit with a hammer
It's nothing something that happens every day, and as I say it has happened when stationary so I'm not sure it's gearbox related (well, I hope not anyway).
Bit of a long shot, but has anyone got any idea what's going on? Just had her running nicely as well!