728919 Removing and installing motor for backrest adjustment
WM 728919 Removing and installing motor for backrest adjustment
Tools
Information
Installation position of motor for backrest adjustment
Installation position of motor for backrest adjustment
Preliminary work
1. Remove cover for backrest.
-> 722619 Removing and installing cover for backrest 722619 Removing and installing cover for backrest
2. Only for adaptive sports seat with air cushion in the side bolsters:
Remove air cushion for right backrest.
-> 721719 Removing and installing air cushion for backrest 721719 Removing and installing air cushion for backrest
Removing motor for backrest adjustment
Removing right backrest side-bolster support
1. Unscrew fastening screws -1- and remove the right backrest side-bolster support -2-.
Removing right backrest side-bolster support
Removing motor for backrest adjustment
1. Unclip inner spring on backrest frame -1- at the drive shaft -2- ( -arrows B- ) and swivel it upwards -arrow C-.
Removing inner spring
2. Turn plug connection -3- approx. 90° anti-clockwise -arrow D- and remove it from the backrest frame -arrow E-.
Disconnecting plug connection
2.1. Release plug connection -3- ( -arrows a- ) and disconnect it -arrows F-.
3. Unscrew the two fastening screws -1- and remove motor for backrest adjustment -2-.
Removing motor for backrest adjustment
4. Pull the drive shaft -1- out of the transmission mount -2- and check it for damage.
Removing drive shaft
Installing motor for backrest adjustment
1. Insert the drive shaft -1- into the transmission mount by turning it slightly -2-.
Installing drive shaft
2. Slide motor for backrest adjustment -2- onto the drive shaft by turning it slightly and secure with the two fastening screws -1-.
Installing motor for backrest adjustment
3. Push the plug connection -3- together -arrows A- until it engages securely.
Connecting plug connection on motor for backrest adjustment
3.1. Insert plug connection -3- into the backrest frame -arrow B- and turn it approx. 90° clockwise -arrow C-.
4. Swivel inner spring on backrest frame -1- downwards -arrow D- and clip it in at the drive shaft -2- ( -arrows E- ).
Installing inner spring
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. Remove control panel trim and plug in electric connectors on the control panel for seat adjustment.
-> 721619 Removing and installing control panel trim 721619 Removing and installing control panel trim
3. Connect the battery.
-> 2X00IN Work instructions after disconnecting the battery 2X00IN 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. Test cable 9745 and test cable 9745/1 can now be disconnected.
Fitting right backrest side-bolster support
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 right backrest side-bolster support -2- and fit fastening screws -1-.
Fitting right backrest side-bolster support
Subsequent work
1. Only for adaptive sports seat with air cushion in the side bolsters:
Install air cushion for right backrest:
-> 721719 Removing and installing air cushion for backrest 721719 Removing and installing air cushion for backrest
2. Install cover for backrest.
-> 722619 Removing and installing cover for backrest 722619 Removing and installing cover for backrest