Trunk / Liftgate: Testing and Inspection

Eliminating Noise Symptoms - Reworking Balancing Weight For Rear Lid






General information

Symptoms
Noises in the rear lid area.

Causes and remedial action
Noises may occur due to the balancing weight being excited because of different chassis settings.
In the event of a complaint, this problem must be remedied by reworking the balancing weight using a repair kit.

Tools and materials
987.512.925.00 Repair kit for balancing weight -> REPAIR KIT FOR BALANCING WEIGHT

Preliminary work
1. Remove trim panel for rear lid. Refer to Removing and installing trim panel for rear lid "Removing"

Reworking balancing weight for rear lid
1. Unscrew fastening screws -1- and remove balancing weight -2- from the rear lid -3- ( -arrow- ).






2. Drill off buffer stops -1- on the balancing weight -2- using a 10 mm drill bit. The rotational speed for this step should be approx. 250 rpm.






3. Stick foam rubber rings (4 x Dia 60 mm) -1- onto the drilled-off buffer stops -2-.






4. Stick foam rubber rings (2 x Dia 50 mm) -1- onto the stops on the rear lid -2- in the area of the balancing weight threaded joint.






5. Stick on washers.






5.1. Stick washers M6 -1- onto the bottom of the rubber mountings -2- using a commercially available adhesive.
5.2. Stick washers M10 -3- onto the top of the rubber mountings.

6. Stick buffer stops -1- onto the top washer -2-.






NOTE:
- Coat the fastening screws with Loctite 241 screw-locking lacquer.
- When screwing on the balancing weight for the rear lid, use an open-ended wrench on the buffer stops to prevent them from turning.

7. Position balancing weight -2- on the rear lid -3- and secure with the fastening screws -1-. -> Tightening torque: 9.7 Nm (7 ftlb.)






Subsequent work
1. Install trim panel for rear lid. Refer to Removing and installing trim panel for rear lid on "Installing"