Removal and installation the trim from the threshold side
Switch off the ignition. Unscrew screw "1" (2 Nm). Press the expansion rod "2" inward from the expansion piston "3" and remove the piston. Detach the trim from the seat by moving it outward. Disconnect the wiring harness from the driver's seat lumbar support adjustment switch "E176" "4" and from the driver's seat adjustment control panel "E470" "5". Disconnect the wiring harness from the trim.
Removal and installation switches
The following switches are installed in the lining on the threshold side: the driver's seat lumbar support adjustment switch "E176", the driver's seat position control panel "E470".
Switch off the ignition. Remove the trim from the threshold side. Carefully disconnect button "1" using the puller "T10236" from the lumbar support adjustment switch "3". Unscrew screws "2" (1 Nm) and remove the lumbar support adjustment switch "3" from the trim. Carefully disconnect button "4" using the puller "T10236" from the seat position control panel "6". Unscrew three screws "5" (1 Nm) and remove the seat position control panel "6" from the trim.
Removal and installation the trim bracket from the threshold side
Remove the trim from the threshold side. Disconnect the trim in the area of screw "1" and lift the cushion slightly. Unscrew screw "1" (8 Nm). Unscrew screw "2" (8 Nm). Unscrew two screws "3" (8 Nm). Remove bracket "4" from the seat frame.
Removal and installation the seat longitudinal adjustment mechanism
Instructions: The seat longitudinal adjustment motor cannot be replaced separately. It is supplied together with the lower seat frame.
Remove the head restraint. Move the seat as high as possible. Fit the seat repair bracket -VAS 6136- on the test stand -VAS 6095-. Remove the front seat. Secure the seat to the bracket -VAS 6136-. Remove the front seat belt buckle. Remove the trim on the tunnel side. Remove the trim on the sill side. Remove the wiring harnesses from the lower seat frame. Remove the bracket for the trim on the sill side. Disconnect the wiring harness from the seat longitudinal adjustment motor. Unscrew screw "1" of the height adjustment drive from the seat frame on the sill side. Secure the socket of the lead screw "2" against turning. Unscrew screws "5" and "6" located at the front. Unscrew screws "3" and "4" located at the rear.
Using an upward movement, remove the headrest base "1" from the lower seat frame "2".
Installation
Insert the seat cushion base "1" into the lower frame "2".
Instructions: The threads of the new screws are coated with microcapsules with a locking agent, so the screws must be replaced after each unscrewing. Before installing new screws, clean the threads of the corresponding nuts. In order not to damage the threads in the threaded and support bushings, tighten all screws by hand.
Screw in and tighten the rear screws "3" and "4" to a torque of 22 Nm. Remove the stopper of the lead screw socket "2" installed during removal. Screw in and tighten the screw "1" of the height adjustment drive fastening to a torque of 18 Nm. Screw in and tighten the front screws "5" and "6" to a torque of 22 Nm. Connect the wiring harness to the electric motor for adjusting the longitudinal position of the seat. Further installation is carried out in the reverse order.
Removal and installation the backrest adjustment drive
Fit the seat repair bracket -VAS 6136- to the test stand -VAS 6095-. Remove the front seat. Secure the seat to the bracket -VAS 6136-. Remove the front seat belt buckle. Remove the trim on the tunnel side. Remove the trim on the sill side. Disconnect the two wiring harnesses of the seat backrest drives at the bottom of the seat frame. Remove the wiring harnesses from the seat frame. Remove the seat backrest. Secure the backrest to the bracket -VAS 6136-. If present, remove the folding table from the backrest. Remove the cushion and the backrest cover of the front seat. Disconnect the wiring harness from the backrest adjustment motor. Unscrew screw "1" (7.5±1 Nm). Unscrew nut "2" (8±1 Nm).
Remove the drive shaft "1" from the backrest "arrow". Remove the backrest adjustment drives "2" from the seat backrest.
Removal and installation the cushion tilt adjustment drive
Remove the head restraint. Move the seat as high as possible. Fit the seat repair bracket -VAS 6136- on the test stand -VAS 6095-. Remove the front seat. Secure the seat to the bracket -VAS 6136-. Remove the front seat belt buckle. Remove the trim on the tunnel side. Remove the trim on the sill side. Remove the wiring harnesses from the lower seat frame. Disconnect the wiring harness from the seat fore/aft adjustment motor. Disconnect the wiring harness from the seat cushion angle adjustment motor. Unscrew screws "5" and "6" at the front. Disconnect the seat from the lower frame at the front and fold it back.
Unscrew screw "1". Unscrew the "arrow" screws and remove the electric motor.
Secure lead screw "2" from turning using pliers and unscrew the screw. Unscrew lead screw "2" from nut "3".
Installation
Screw the lead screw "1" of the drive "2" as deeply as possible into the nut "3". Screw it in by hand (but don't delay) screw "4" into the lead screw.
Instructions: Tighten screw "A" to the proper torque only after installing the seat in the car and connecting it to the on-board network.
Secure the drive with screw "1", (6±2 Nm). Further installation is carried out in the reverse order. The seat is installed by you and connected to the on-board network. Lower the cushion, using the mechanism for adjusting its tilt, and simultaneously tighten screw "4" with a torque of 8±1 Nm.
Removal and installation the height adjustment drive
Remove the head restraint. Move the seat as high as possible. Fit the seat repair bracket -VAS 6136- on the test stand -VAS 6095-. Remove the front seat. Secure the seat to the bracket -VAS 6136-. Remove the front seat belt buckle. Remove the trim on the tunnel side. Remove the trim on the sill side. Remove the bracket for the trim on the sill side. Remove the wiring harnesses from the lower seat frame. Disconnect the wiring harness from the height adjustment motor. Unscrew screw "1" (18±2 Nm). Unscrew screw "2" (6±2 Nm). Remove drive "3" from the seat frame.
Removal and installation lumbar support (with electrical adjustment in 4 directions)
Install seat repair bracket -VAS 6136- on test stand -VAS 6095-. Remove front seat. Secure seat to bracket -VAS 6136-. Remove front seat belt buckle. Remove trim on tunnel side. Remove trim on sill side. Disconnect two seat backrest drive wiring harnesses at the bottom of seat frame. Remove wiring harnesses from seat frame. Remove seat backrest. Secure backrest to bracket -VAS 6136-. If present, remove folding table from backrest. Remove front seat cushion and backrest cover. Disconnect wiring harnesses from lumbar support adjustment motors. Drill out rivet "1" on backrest. Turn lumbar support "2" and disconnect it from backrest frame. Remove lumbar support "2" from both mounting sockets "3" and "4" located in the upper front part of the backrest frame.
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