Multi-Contour Seat Pneumatic Components Assembly Overview

Multi-Contour Seat Pneumatic Components Assembly Overview

• Repair instructions and test methods for pneumatic components. Refer to => [ Repair Instructions and Test Methods for Front Seat Pneumatic Components ] Repair Instructions and Test Methods for Front Seat Pneumatic Components.






1 Seat bolster inflation adjustment

• If equipped

• Assembly Overview, refer to => [ Seat and Backrest Bolster Adjuster Assembly Overview ] Seat and Backrest Bolster Adjuster Assembly Overview

• Removing and Installing, refer to => [ Seat Bolster Adjuster ] Seat Bolster Adjuster

2 Driver seat multicontour seat compressor (V439)

• Front passenger side front passenger multicontour seat compressor (V440)

• Assembly Overview, refer to => [ Multicontour Seat Compressor Assembly Overview ] Multicontour Seat Compressor Assembly Overview

• Removing and Installing, refer to => [ Compressor Multicontour Seat Compressors V439/V440 ] Compressor Multicontour Seat Compressors V439/V440

3 Backrest bolster inflation adjuster

• If equipped

• Assembly Overview, refer to => [ Seat and Backrest Bolster Adjuster Assembly Overview ] Seat and Backrest Bolster Adjuster Assembly Overview

• Removing and Installing, refer to => [ Backrest Bolster Adjuster ] Backrest Bolster Adjuster

4 Check valve

• Depending on the version, separate component or integrated in the multi-contour seat control module

• Remove the external check valve if installing a multicontour seat control module that contains a check valve. Refer to the => electronic parts catalog

• Installed position: the arrow on the check valve must point toward the control module.

5 Massage mat

• integrated in the backrest cushion; if defective replace backrest cushion => [ Backrest Cover and Backrest Cushion for Multi-contour Seat, Separating and Connecting ] Backrest Cover and Backrest Cushion for Multi-contour Seat, Separating and Connecting

• If equipped

• Assembly Overview, refer to => [ Backrest Cushion with Massage Mat Assembly Overview ] Backrest Cushion with Massage Mat Assembly Overview

• Removing and Installing, refer to => [ Backrest Cover and Backrest Cushion for Multi-contour Seat, Separating and Connecting ] Backrest Cover and Backrest Cushion for Multi-contour Seat, Separating and Connecting

6 Driver side multicontour seat control module (J873)

• Front passenger side right front multicontour seat control module (J872)

• The connection for the restrictor is deleted on the Original Replacement Part with an integrated check valve and the separate check value must be removed. Refer to the => Parts Catalog

• Assembly Overview, refer to => [ Front Multicontour Seat Control Module, Lumbar Support air Cushion Module Carrier and Backrest Fan Assembly Overview ] Front Multicontour Seat Control Module, Lumbar Support air Cushion Module Carrier and Backrest Fan Assembly Overview

• Removing and Installing, refer to => [ Multi-Contour Seat Control Modules J873/J872 ] Multi-Contour Seat Control Modules J873/J872

7 Valve block 1 in the driver seat (N475)

• for massage mat

• Front passenger side valve block 1 in front passenger seat (N477)

• If equipped

• Assembly Overview, refer to => [ Backrest Cushion with Massage Mat Assembly Overview ] Backrest Cushion with Massage Mat Assembly Overview

• Removing and Installing, refer to => [ Valve Blocks N475/N476/N477/N478 for Massage Mat ] Valve Blocks N475/N476/N477/N478 for Massage Mat

8 Pulsation damper

9 Module carrier with air cushions for lumbar support

• Cannot be disassembled

• Assembly Overview, refer to => [ Front Multicontour Seat Control Module, Lumbar Support air Cushion Module Carrier and Backrest Fan Assembly Overview ] Front Multicontour Seat Control Module, Lumbar Support air Cushion Module Carrier and Backrest Fan Assembly Overview

• Removing and Installing, refer to => [ Module Carrier with Air Cushions for Lumbar Support ] Module Carrier with Air Cushions for Lumbar Support

10 Valve block 2 in the driver seat (N476)

• for massage mat

• Front passenger side valve block 2 in front passenger seat (N478)

• If equipped

• Assembly Overview, refer to => [ Backrest Cushion with Massage Mat Assembly Overview ] Backrest Cushion with Massage Mat Assembly Overview

• Removing and Installing, refer to => [ Valve Blocks N475/N476/N477/N478 for Massage Mat ] Valve Blocks N475/N476/N477/N478 for Massage Mat