Checking Seat-Belt Buckle Release

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Release the seat belt by pressing your finger on the button on the belt buckle.
Carry out the test procedure at least 5 times. If the belt tongue fails to jump out even just once, the entire seat belt and belt buckle must be replaced.