A4 Mk2
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| 1 - | Electrical connector |
| q | For driver seat lumbar support adjustment pump -V152- |
| q | For front passenger side lumbar support adjustment pump -V153- |
| 2 - | Electrical connector |
| q | For driver seat lumbar support adjustment pressure switch -F224- |
| q | For front passenger seat lumbar support adjustment pressure switch -F225- |
| 3 - | Solid foam block |
| q | For pneumatic components |
| q | Attached at bottom of backrest with double-sided adhesive tape |
| q | Removing and installing → Chapter „Removing and installing backrest cover and padding“ |
| 4 - | Air cushion for four-way lumbar support adjustment |
| q | Attached to solid foam block -3- with plastic plugs |
| q | Remove backrest padding in order to remove → Chapter |
| q | Lever out plastic plugs using removal lever -80-200- |
| 5 - | Lumbar support adjustment pressure switch |
| q | Driver seat lumbar support adjustment pressure switch -F224- |
| q | Front passenger seat lumbar support adjustment pressure switch -F225- |
| q | Remove backrest padding in order to remove → Chapter |
| 6 - | Y-piece |
| q | For pneumatic hoses to valve blocks |
| 7 - | Valve block for lumbar support adjustment |
| q | Lumbar support adjustment valve block on driver side -N209- |
| q | Lumbar support adjustment valve block on front passenger side -N210- |
| q | Remove backrest padding in order to remove → Chapter |
| 8 - | Valve block for seat and backrest bolster adjustment |
| q | Valve block for driver seat and backrest bolster adjustment -V378- |
| q | Valve block for front passenger seat and backrest bolster adjustment -V379- |
| q | Remove backrest padding in order to remove → Chapter |
| 9 - | Lumbar support adjustment pump |
| q | Driver seat lumbar support adjustment pump -V152- |
| q | Front passenger side lumbar support adjustment pump -V153- |
| q | Remove backrest padding in order to remove → Chapter |
| q | Secured with rubber strap -11- and plastic plugs -10- |
| 10 - | Plastic plug |
| q | Lever out using removal lever -80-200- |
| 11 - | Rubber strap |
