Remove the poly V-belt.
Unscrew the bolts and remove the vibration damper. When removing the vibration damper, it is not necessary to unscrew the pulley mounting bolt.

Fig. 3.1–49. Location of the mark on the vibration damper
When installing the vibration damper, check that the mark (Fig. 3.1–49) is aligned with the mark on the timing belt pulley and tighten the vibration damper mounting bolts to a torque of 22 N·m.
(Content source: the specified website AudiManual.ru)
