Seat Frames: Adjustments Audi A3 8P facelift

SEAT HEIGHT ADJUSTMENT HANDLE

Removing

Scheme 7

Remove the front seat bolts and tilt the seat as far back as possible.

Note. The electrical connectors for the front seat must not be loosened.

Push seat height adjustment handle down and hold in this position.

Using a narrow screwdriver, press clips -1- inward -arrow A- and remove seat height adjustment handle -2- from lever -arrow B-.

Installation

Scheme 8

Installation is reverse of removal, but note the following

Make sure the clip springs -2- (quantity: 2) -3- are positioned on outside of lever -1-.

LUMBAR SUPPORT ADJUSTMENT MOTOR, VERSION 2

Removing

Scheme 9

Note. When replacing the lumbar support adjustment motor, the four-way lumbar support must not be at an end position.

Remove backrest cover panel. Refer to BACKREST COVER .

Disconnect the connector -1-.

Disengage retaining bracket -2- using a screwdriver and remove actuator -3- upward.

Installation

Installation is performed in reverse order of removal, noting the following

1. The lumbar support adjustment motor can be installed in one position only.

SEAT HEIGHT ADJUSTMENT UNIT

Removing

Remove the seat. Refer to FRONT MANUAL SEAT .

Secure the seat on the VAS 6136. Refer to FRONT SEAT, INSTALLING ON VAS 6136 .

Remove side trim on sill side. Refer to SILL SIDE TRIM .

Remove nut -5-.

Scheme 10

Remove bolts -2, 3, 6-.

Remove seat height adjustment unit -1- and retaining plate -4-.

Note. If the seat height adjustment unit is being exchanged, remove the bolts -arrows- and remove the lever -7-.

Installation

Installation is reverse of removal, but note the following

Note. Ensure that electrical connections are pushed in as far as stop and engage with a click.

Disconnect the battery ground wire with the ignition switched on. Refer to [For engine(s) CBRA, BPY, CCTA, CBFA] Removal and Installation .

Note. If Airbag Malfunction Indicator Lamp (MIL) -K75- indicates a fault after installation, DTC memory must be checked, deleted and checked again.

FRONT SEAT WITH FAULTY FORWARD/BACK ADJUSTMENT MOTOR

Removing

Scheme 11

Note. Removing the driver seat is described. Removing the passenger seat is identical.

Bring headrest into lowest lock position.

Move the seat as far up as possible.

The seat cannot be moved as far up as possible, disconnect the upper frame from the seat pan lower frame. Refer to SEAT PAN, DISASSEMBLING AND ASSEMBLING .

1. The sill side trim -1- is removed. Refer to «SILL SIDE TRIM»(ref-496057-S31475727852012082100000) .

Remove the bolts -3- for the cross bar -2- on both sides.

Disconnect the electrical connector on the seat forward/back adjustment motor.

Move seat until bolts -4- (quantity: 4) are visible.

Remove the bolts -4-.

Disconnect the battery ground wire with the ignition off. Refer to [For engine(s) CBRA, BPY, CCTA, CBFA] Removal and Installation .

Disconnect the electrical connectors at the connector station in the floor. Refer to CONNECTORS, DISCONNECTING AND CONNECTING .

Connect the VAS 6235 to the side airbag electrical connector on the seat. Refer to AIRBAG ADAPTER, CONNECTING .

Raise the seat with a 2nd technician and remove it from the vehicle.

Installation

If the forward/back adjustment motor is motor: Install la new lower seat pan frame with forward/back motor. Refer to SEAT PAN, DISASSEMBLING AND ASSEMBLING .

Installation is reverse of removal, but note the following

Remove VAS 6235 only after installing seat. Refer to AIRBAG ADAPTER, CONNECTING .

Note. Ensure that electrical connections are pushed in as far as stop and engage with a click.

Connect the connector to the couplings on the connector station in the floor. Refer to CONNECTORS, DISCONNECTING AND CONNECTING .

Disconnect the battery ground wire with the ignition switched on. Refer to [For engine(s) CBRA, BPY, CCTA, CBFA] Removal and Installation .

Note. If Airbag Malfunction Indicator Lamp (MIL) -K75- indicates a fault after installation, DTC memory must be checked, deleted and checked again.

The removing and installing is described for the mechanically adjustable front power seat. It is identical for the adjustable front power seat.

SEAT ANGLE ADJUSTMENT MOTOR

Removing

Remove the seat. Refer to POWER SEAT .

Secure the seat on the VAS 6136. Refer to FRONT SEAT, INSTALLING ON VAS 6136 .

Remove bolts -arrows-.

Scheme 12

Remove the retaining plate -4-.

Remove the bolt -2-.

Disconnect electrical harness connector -3-.

Remove the seat angle adjustment motor -1-.

Installation

Installation is reverse of removal, but note the following

Note. Ensure that electrical connections are pushed in as far as stop and engage with a click.

Disconnect the battery ground wire with the ignition switched on. Refer to [For engine(s) CBRA, BPY, CCTA, CBFA] Removal and Installation .

Note. If Airbag Malfunction Indicator Lamp (MIL) -K75- indicates a fault after installation, DTC memory must be checked, deleted and checked again.

SEAT FORWARD/BACK ADJUSTMENT MOTOR

Note. If motor is faulty, lower seat pan frame must be replaced.

Removing

Remove the seat. Refer to POWER SEAT .

Secure the seat on the VAS 6136. Refer to FRONT SEAT, INSTALLING ON VAS 6136 .

Separate the seat pan upper frame from the lower frame. Refer to SEAT PAN, DISASSEMBLING AND ASSEMBLING .

Note. The inclination adjustment motor and height adjustment motor must be installed in the new seat pan lower frame.

Remove the inclination adjustment motor -1-. Refer to SEAT ANGLE ADJUSTMENT MOTOR .

Scheme 13

Remove the height adjustment motor -3-. Refer to SEAT HEIGHT ADJUSTMENT MOTOR .

2 - Seat forward/back adjustment motor

4 - Seat pan lower frame

Installation

Install the height adjustment motor -3- that was removed in the new seat pan lower frame -4-.

Install the inclination adjustment motor -1- that was removed in the new seat pan lower frame.

Further installation is performed in reverse sequence of removal, but observe the following

Note. Ensure that electrical connections are pushed in as far as stop and engage with a click.

Disconnect the battery ground wire with the ignition switched on. Refer to [For engine(s) CBRA, BPY, CCTA, CBFA] Removal and Installation .

Note. If Airbag Malfunction Indicator Lamp (MIL) -K75- indicates a fault after installation, DTC memory must be checked, deleted and checked again.

SEAT HEIGHT ADJUSTMENT MOTOR

Removing

Remove the seat. Refer to POWER SEAT .

Secure the seat on the VAS 6136. Refer to FRONT SEAT, INSTALLING ON VAS 6136 .

Remove side trim on sill side. Refer to SILL SIDE TRIM .

Remove side trim on tunnel side. Refer to TUNNEL SIDE TRIM .

Remove the backrest. Refer to BACKREST .

Disconnect the electrical connector -4- on the seat height adjustment motor -2-.

Scheme 14

Disconnect seat pan upper frame -1- from lower frame -3-.

Remove seat pan upper frame with cover and upholstery from lower frame.

Remove the bolts -2-.

Scheme 15

Pull the height adjustment motor -1- toward the center of the seat and remove from the seat pan lower frame -3-.

Installation

Make sure the clip -arrow A- and plastic toothed segment collar -2- and the locking pins -B arrows- are inserted correctly in the holes on the fitting -1-.

Scheme 16

Make sure the plastic toothed segment is clipped to the fitting correctly.

1. The plastic toothed segment collar -arrow C- must lie evenly on the fitting.

Make sure the locking pins -A arrows- are inserted correctly in the holes -B arrows- on the link plate -1-.

Scheme 17

Further installation is performed in reverse sequence of removal, but observe the following

Note. Ensure that electrical connections are pushed in as far as stop and engage with a click.

Disconnect the battery ground wire with the ignition switched on. Refer to [For engine(s) CBRA, BPY, CCTA, CBFA] Removal and Installation .

Note. If Airbag Malfunction Indicator Lamp (MIL) -K75- indicates a fault after installation, DTC memory must be checked, deleted and checked again.

BACKREST ADJUSTMENT MOTOR

Removing

Remove the backrest. Refer to BACKREST .

Remove backrest cover panel. Refer to BACKREST COVER .

Remove cover with upholstery. Refer to BACKREST COVER AND UPHOLSTERY .

Pry off the spring washer -1- on the side of the backrest adjustment motor using a screwdriver.

Scheme 18

Remove the bolt -2-.

Remove the shaft -5- out the backrest frame far enough -arrow- until the backrest adjustment motor -3- is comes out.

Disconnect electrical harness connector -4-.

Remove the backrest adjustment motor.

Installation

Slide shaft -5- through backrest adjustment motor and backrest frame.

Secure the backrest adjustment motor -3- with the bolt -2-.

Place the backrest frame to the side.

Place a wood block under the shaft -5- on the opposite side of the backrest adjustment motor.

Drive the spring washer -1- onto the shaft using a socket insert (11 mm).

Further installation is performed in reverse sequence of removal, but observe the following

Note. Ensure that electrical connections are pushed in as far as stop and engage with a click.

Disconnect the battery ground wire with the ignition switched on. Refer to [For engine(s) CBRA, BPY, CCTA, CBFA] Removal and Installation .

Note. If Airbag Malfunction Indicator Lamp (MIL) -K75- indicates a fault after installation, DTC memory must be checked, deleted and checked again.

LUMBAR SUPPORT ADJUSTMENT SWITCH

Note. Removal and installation is the same on the driver and passenger seat.

Removing

Scheme 19

Remove side trim on sill side. Refer to SILL SIDE TRIM .

Remove bolts -arrows-.

Remove the lumbar support adjustment switch -1- from the sill side trim.

Installation

To install, perform the steps used in removal in reverse order.

SEAT ADJUSTMENT ACTUATOR

Note. The seat adjustment actuator can be removed and installed with the seat installed. Removal and installation is the same on the driver and passenger seat.

Special tools and workshop equipment required

1. Trim Removal Wedge 3409

Removing

Scheme 20

Using the 3409, pry the actuator -1- out of the retainer on the seat forward/back, angle and height adjustment switch.

Installation

Installation is reverse of removal, but note the following

Make sure the actuator engages correctly with the switch.

BACKREST ADJUSTMENT ACTUATOR

Note. The backrest adjustment actuator can be removed and installed with the seat installed. Removal and installation is the same on the driver and passenger seat.

Special tools and workshop equipment required

1. Trim Removal Wedge 3409

Removing

Scheme 21

Using the 3409, pry the actuator -1- out of the retainer on the backrest adjustment switch.

Installation

Installation is reverse of removal, but note the following

Make sure the actuator engages correctly with the switch.

SEAT ADJUSTMENT SWITCH

Removing

Scheme 22

Remove side trim on sill side. Refer to SILL SIDE TRIM .

Remove the seat adjustment actuator. Refer to SEAT ADJUSTMENT ACTUATOR .

Remove the backrest adjustment actuator. Refer to BACKREST ADJUSTMENT ACTUATOR .

Remove bolts -arrows-.

Remove the switch -1- for the seat forward/back, angle, height and backrest adjustment.

Installation

To install, perform the steps used in removal in reverse order.

BACKREST ADJUSTMENT HAND WHEEL

Removing

Scheme 23

Press side panel -2- lightly in direction of backrest.

Slightly lift and disengage retaining detent -1- using a screwdriver.

Turn backrest adjustment hand wheel -3- and disengage another retaining detent.

Remove hand wheel for backrest adjustment.

Installation

Installation is reverse of removal, but note the following

Hand wheel must be pressed on until it audibly engages.

Note. If the hand wheel for backrest adjustment sits loosely on the adjustment shaft, the hand wheel for backrest adjustment must be replaced.

Removing

Scheme 24

Pull seat height adjustment handle up and hold in this position.

Using a narrow screwdriver, press clips -1- inward -arrow A- and remove seat height adjustment handle -2- from lever -arrow B-.

Installation

Installation is reverse of removal, but note the following

Make sure the clip springs -2- (quantity: 2) -3- are positioned on outside of lever -1-.

Scheme 25

1. Retaining Clip
2. Seat Height Adjustment Handle Lever
3. Seat Height Adjustment Unit Removing -- Remove the seat. Refer to «SEAT»(ref-496057-S28709605442012082100000) . -- Secure the seat on the VAS 6136. Refer to «FRONT SEAT, INSTALLING ON VAS 6136»(ref-496057-S16205627172012082100000) . -- Remove backrest and front seat pan. Refer to «FRONT BACKREST AND SEAT PAN»(ref-496057-S28615662842012082100000) . -- Remove nut -5-. -- Remove bolts -7- (quantity: 2). -- Remove the bolt -4-. -- Remove seat height adjustment unit -3- and retaining plate -6-. Installation Installation is reverse of removal, but note the following: -- Make sure the retaining plate -6- makes contact on backrest frame at -position of arrow-.
4. Bolt Tightening specification 8 Nm
5. Nut Tightening specification 12 Nm
6. Retaining Plate
7. Screws Quantity: 2 Tightening specification 8 Nm