Removing and Installing Motor For Backrest Adjustment

728919 Removing And Installing Motor For Backrest Adjustment






Preliminary work
1. Remove cushion carrier for front backrest.

NOTE: Only for vehicles with adaptive sports seats.

2. Remove right air cushion for backrest.

Removing motor for backrest adjustment






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






Removing motor for backrest adjustment
1. Unclip inner spring for backrest frame -1- at the drive shaft -2- (-arrows B-) and swivel it upwards (-arrow C-).






2. Turn plug connection -3- approx. 90 ° anti-clockwise -arrow D- and remove it from the backrest frame -arrow E-.
3. Release plug connection -3- (-arrows a-) and disconnect it -arrows F-.
4. Unscrew the two fastening screws -1- and remove motor for backrest adjustment -2-.






5. Pull drive shaft -1- out of the gear mount -2- and check for damage.






Installing motor for backrest adjustment
1. Insert the drive shaft -1- into the gear mount -2- by twisting slightly.






2. Push motor for backrest adjustment -2- onto the drive shaft by twisting slightly and secure with the two fastening screws -1-.






3. Push plug connection -3- together -arrows A- until it engages securely.






4. Insert plug connection -3- into the backrest frame -arrow B- and turn approx. 90° clockwise -arrow C-.
5. Swivel inner spring for backrest frame -1- downwards -arrow D- and clip in at the drive shaft -2- (-arrows E-).

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.

Installing backrest side support

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. Fit backrest side support -2- and screw down with the four fastening screws -1-.






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