2nd possibility:

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Release switch by turning it 90° and pull it out of the installation opening.
Pull operating plunger out of the switch as far as it will go.
Reinstall the switch. When installing the switch for the first time, it is essential to press it vertically against the bearing surface. It will otherwise not be possible to lock the switch (90° turn), even if great force is exerted.
NOTE: A play-free fit of the switch is no longer ensured after it has been installed and removed several times. The switch must be replaced by a new switch as soon as it perceptibly "wobbles" in its receiver.