72361900 Removing and installing motor for lumbar support
WM 723619 Removing and installing motor for lumbar support
Tools
Preliminary work
1. Remove cushion carrier for front backrest. -> 722419 Removing and installing cushion carrier for front backrest - section on "Removing" 722419 Removing and installing cushion carrier for front backrest (air-conditioned comfort seat)
Information
Only for vehicles with adaptive sports seats.
2. Remove left air cushion for backrest. -> 721719 Removing and installing air cushion for backrest - section on "Removing" 72171900 Removing and installing air cushion for backrest
Removing motor for lumbar support
Removing support for left backrest side part
Installation position of motor for lumbar support
1. Unscrew the four fastening screws -1- and remove support for backrest side part -2-.
Removing support for left backrest side part
Taking off foam part
Installation position of control valve for lumbar support adjustment
1. Remove foam part -1- at the headrest.
Taking off foam part
Removing motor for lumbar support
1. Pull the white hose -1- off the control valve for lumbar support -2-.
Pulling hose off the control valve for lumbar support
2. Pull the white hose -1- out of the backrest frame -2-.
Pulling hose out of the backrest frame
3. Release plug connection -1- ( -arrow a- ) and disconnect it -arrows B-.
Removing motor for lumbar support
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-.
Installing motor for lumbar support
2. Push plug connection -1- together -arrows C- until it engages securely.
3. Lay the white hose -1- on the backrest frame -2-.
Laying hose on backrest frame
4. Push the white hose -1- onto the control valve for lumbar support -2-.
Pushing hose onto the control valve for lumbar support
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. -> 721619 Removing and installing control module trim panel - section on "Installing" 721619 Removing and installing control module trim panel
3. Connect the battery. -> 2706IN IN -Work instructions after disconnecting the battery External Power Connection, Jump Lead Starting
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.
Fitting foam part
Installing support for left backrest side part
Information
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-.
Installing support for left backrest side part
2. Route wire harness for airbag -1- as shown behind the backrest side part support -2-.
Routing wire harness for airbag
Subsequent work
1. Install right air cushion for backrest. -> 721719 Removing and installing air cushion for backrest - section on "Installing" 72171900 Removing and installing air cushion for backrest
2. Install cushion carrier for front backrest. -> 722419 Removing and installing cushion carrier for front backrest - section on "Installing" 722419 Removing and installing cushion carrier for front backrest (air-conditioned comfort seat)