Removing and Installing Lumbar Support

Removing And Installing Lumbar Support

Tools







Preliminary work

1. Remove cushion carrier for front backrest. Refer to Removing and installing cushion carrier for front backrest.

Removing lumbar support

Taking off foam part







1. Remove foam part -1- at the headrest.







Removing lumbar support







1. Pull off the red and blue hose -1- on the lumbar support control valve -2-.







2. Pull the red and blue hose -1- out of the backrest frame -2-.







INFORMATION: Only for seats with a memory function.

3. Pull connectors off the lumbar support sensors.







3.1. Swivel lumbar support -1- upward -arrow A-.
3.2. Pull the two sensors -2- forward behind the backrest panel -arrows B-.
3.3. Release both connectors -3- at the sensors -2- (-arrow a-) and unplug them -arrow C-.

4. Remove the two tie-wraps -2- on the lumbar support -1-.







5. Remove lumbar support -1- together with the red and blue hose -3-.

Installing lumbar support

1. Install the lumbar support -1- together with the red and blue hose -3-.







2. Secure the lumbar support -1- to the grille using two new tie-wraps -2-.

INFORMATION: Only for seats with a memory function.

3. Attach connectors to the lumbar support sensors.







INFORMATION:
- Observe installation position of connectors.
- Push red-lilac-brown connector onto the sensor at the top air cushion.
- Push red-white-brown connector onto the sensor at the bottom air cushion.

3.1. Connect the two connectors -3- to the sensors -2- (-arrow A-) until they engage securely.
3.2. Push the two sensors -2- behind the backrest panel -arrows B- and fold down the lumbar support -1- (-arrow C-).

4. Lay the red hose and the blue hose -1- on the backrest frame -2-.







INFORMATION:
- Observe the installation position of the hoses.
- Push on the blue hose onto the connection marked B and push on the red hose onto the connection marked R.

5. Slide the red and blue hose -1- onto the lumbar support control valve -2-.







6. Check the function of the lumbar support using the test cable.

Checking seat following removal

1. Connect the removed seat to the vehicle's wiring harness via test cable 9745 and test cable 9745/1.
2. Connect electric plug to control module trim panel. Removing and installing control module trim panel.
3. Connect the battery. Refer to Work instructions after disconnecting the battery.
4. Switch on ignition.
5. Carry out a function check on the seat components.
6. Switch off ignition after function test and disconnect battery.
7. Disconnect test cable 9745 and test cable 9745/1.

Fitting foam part

INFORMATION:
- Observe the installation position of the hoses.
- Make sure that the hoses are not pinched. Insert hoses exactly into the cut-outs on the foam part.

1. Fit foam part -1- at the headrest.







Subsequent work

Reworking

1. Install cushion carrier for front backrest. Refer to Removing and installing cushion carrier for front backrest.