E82M, if the noise occurs when idling and in neutral (foot off clutch pedal), then it is most likely the dual mass flywheel. It is common on cars with DM flywheels. The general consensus is that it's not necessarily hurting anything, but it can be annoying to listen to.
Try pushing the clutch pedal in when you hear the noise and it should go away. If you release the clutch pedal back out very slowly, the noise won't be as noticeable.