Removing and Installing Motor For Lumbar Support

723619 Removing And Installing Motor For Lumbar Support






Preliminary work
1. Remove cushion carrier for front backrest.

NOTE: Only for vehicles with adaptive sports seats.

2. Remove left air cushion for backrest.

Removing motor for lumbar support






1. Unscrew the four fastening screws -1- and remove support for backrest side part -2-.






Taking off foam part






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






Removing motor for lumbar support
1. Pull the white hose -1- off the control valve for lumbar support -2-.






2. Pull the white hose -1- out of the backrest frame -2-.






3. Release plug connection -1- (-arrow a-) and disconnect it -arrows B-.






4. Take motor for lumbar support -2- out of the backrest frame (-arrow C-) and pull the hose -3- along with the motor out of the backrest frame -arrow D-.

Installing motor for lumbar support
1. Push hose -3- into the backrest frame -arrow A- and insert motor for lumbar support -2- into the backrest frame -arrow B-.






2. Push plug connection -1- together -arrows C- until it engages securely.
3. Lay the white hose -1- on the backrest frame -2-.






4. Push the white hose -1- onto the control valve for lumbar support -2-.






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.
3. Connect 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

NOTE: 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.






Installing support for left backrest side part

NOTE: Observe hose routing.

In vehicles with lumbar support, make sure the hoses are routed correctly in the area of the backrest side support.

1. Insert support for backrest side part -2- and secure with the four fastening screws -1-.






2. Route wire harness for airbag -1- as shown behind the backrest side part support -2-.






Subsequent work
1. Install right air cushion for backrest.
2. Install cushion carrier for front backrest.