WARNING: This page is about a different car, the 2021 Porsche Macan, 2020 Porsche Macan, and 2019 Porsche Macan. However, it is still accessible from the selected car via links, so may be relevant.
Pull rear lid seal -1-
off the sheetmetal flange -Arrows-
.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Rear lid seal
Remove all the old sealant from the sheetmetal flange.