1. Locate the two trunk lid torsion rods. These are located on either side of the trunk lid, near the hinges.
2. Use a 10mm wrench to loosen the nuts that hold the torsion rods in place.
3. Turn the torsion rods clockwise to increase tension or counterclockwise to decrease tension.
4. Tighten the nuts to hold the torsion rods in place.
5. Close the trunk lid and check the tension. If necessary, repeat steps 3-5 until the desired tension is achieved.