Cayman (987) F6-2.9L (2009)
2. Align wiper arm with the mark on the windscreen.
3. Screw on fastening nut -2- and push on the cover -1-. The cap must engage audibly. - Tightening torque: 19 Nm (14 ftlb.)
4. Actuate wiper motor of the rear window washer system, allow it to come to rest and check the position of the wiper arm once more.