729219 Removing and installing motor for rear vertical adjustment

WM 729219 Removing and installing motor for rear vertical adjustment

Technical values









Preliminary work

1. Remove front seat. => 720119 Removing and installing front seat - section on "Removing"
2. Secure seat on the mounting frame.





Seat on mounting frame

=> Engine transmission repair stand WW-MG 600/v
=> Seat cushion and backrest mount
3. Remove cover for backrest. => 722619 Removing and installing cover for backrest - section on "Removing"

Removing motor for rear vertical adjustment

WARNING

Danger of injury and material damage if airbag units are not handled correctly.

-> Always observe the safety regulations for handling airbag units. => Safety regulations for handling airbags and.
-> The airbag unit must always be stowed so that the airbag opening faces upwards.
-> If removed for an extended period, the airbag unit must be kept in a locked place.
-> Switch off ignition and leave ignition key in. Disconnect battery. Route or isolate the ground strap so that all contact with a ground carrier (e.g. body, seat frame) is avoided. => Work instructions after disconnecting the battery.
-> After the battery is disconnected, always wait for 1 minute before disconnecting the airbag plugs.





Installation position

1. Remove support.





Removing support

1.1. Unscrew fastening screw -3- and remove support -2-.
2. Remove inner pivot axis.





Removing inner pivot axis

2.1. Unscrew fastening screw -4- and remove it.
3. Remove outer pivot axis.





Removing outer pivot axis

3.1. Undo nut and take off fastening screw -5-.
4. Open up seat frame.





Opening seat frame

5. Remove motor.





Removing motor

5.1. Unscrew fastening screws -6-.
5.2. Remove motor -1- and clip -7-.

Information

- Only disconnect the plug axially from the positioning motor. Otherwise the retaining lugs can break off and a secure plug lock cannot be guaranteed.

6. Pull off connector.





Pulling off connector on height adjustment motor

Installing motor for rear vertical adjustment





Installation position

1. Connect connector.





Connecting connector to the motor

2. Install motor.
2.1. Insert motor -1- into the seat frame using the positioning pins and align it.
2.2. Screw in fastening screws -6- and tighten to the specified tightening torque.
=> Tightening torque: 18 Nm (13 ftlb.)+/-2 Nm (+/-1.5 ftlb.)





Installing Motor

2.3. Fit clip -7-.
3. Fold down seat frame.





Folding down seat frame

4. Install outer pivot axis.
4.1. Insert pivot axis -5- and tighten nut to specified tightening torque.
=> Tightening torque: 28 Nm (21 ftlb.)+/-3 Nm (+/-2.0 ftlb)





Installing outer pivot axis

5. Install inner pivot axis.
5.1. Insert pivot axis -4- and tighten to the specified tightening torque.
=> Tightening torque: 28 Nm (21 ftlb.)+/-3 Nm (+/-2.0 ftlb)





Installing inner pivot axis

6. Install support.
6.1. Fit support -2- on seat frame.
6.2. Insert fastening screw -3- and tighten to the specified tightening torque.
=> Tightening torque: 25 Nm (19 ftlb.)+/-2 Nm (+/-1.5 ftlb.)





Installing Support

Subsequent work

1. Install cover for backrest. => 722619 Removing and installing cover for backrest - section on "Installing"
2. Remove seat from mounting frame.
3. Install front seat. => 720119 Removing and installing front seat - section on "Installing"
4. Teach motor end positions in the control unit.
4.1. For vehicles with seat memory, move the seat once to all end positions.