The Skryp in the boot of the VW Polo Sedan

If there is nothing extra in the trunk, and the sound stays, the creak is likely to produce a foam seal for the tools. To eliminate the creak, you can simply wipe the seal, as well as the trunk lid in the place of contact with the water seal with soap, and repeat the procedure periodically. Also creaking in the trunk area can create retainer retainers.