Removing and installing module carrier with air cushions — AUDI

🧭 Before you start

Fits: Audi A8 D4 (4H, 2010–2017)

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• Ignore (items 1, 2 and 4).

📋 Procedure

1. Remove backrest cover panel .
2. Equipment version with backrest fan: Remove backrest fan .
3. Unplug electrical connector (5) and move clear wiring at module carrier.
4. Press the control unit (3) for the front multi-contour seat upwards slightly to disengage at the module mount (arrow). [Note: Ignore (items 1, 2 and 4).]
5. Sever pneumatic lines leading to lumbar support air cushions at the following locations :

6. Move clear control unit for multi-contour seat (front) with remaining pneumatic lines still connected. [Note: Genuine replacement parts are supplied with short line sections which are connected to the pneumatic lines with line connectors.Before disconnecting the pneumatic lines, transfer the length of the line sections from the genuine replacement part to the part to be removed and separate at exactly this location.]
7. Unplug electrical connector (3).
8. Press the valve block (4) for the massage mat upwards slightly to disengage at the module support (arrow).
9. Lay aside the valve block for the massage mat with the pneumatic lines (1) and (2) connected.
10. Repeat procedure on opposite side of backrest.
11. Cut through cable ties and move clear electrical wiring harness and pneumatic lines at lumbar support module carrier.
12. If fitted, move clear rubber collar (2) at lumbar support module carrier.
13. Disengage the backrest cover at the bottom from the backrest frame in the area of the bolted joint and unscrew the bolt (1).
14. Disengage the module mount (3) with lumbar support air cushions upwards from the head restraint frame (arrows) and detach to the rear.

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