I have a 2.0L B6 saloon 2001-2004 petrol, it has a rattle that seems to come from the upper back of engine where there is a chain the drives the second rocker shaft. The motor is behaving normally except for this "rattle". I have recoded a short video/sound for the rattle using my smartphone but it is mp4. Any ideas please! To listen to the rattle: http://www.youtube.com/watch?v=dOb-ab62EMI