We begin to remove the seal from the flanging from the joint.
We skip the new seal behind the trunk lid hinges,...
... evenly distribute it around the perimeter of the opening, without putting it on the flanging. We connect the ends of the seal in the middle of the back panel.
We put the seal on the flanging of the rear panel, starting from the joint, and then around the entire perimeter. Finally we upset the seal with a hand or with light blows of a mallet.