Lumbar Support, Driver's Side (Functional Descriptions)

Operation

Lumbar support adjustment
The adjustment switches in the switch block are used for manual adjustment of the lumbar support. The adjustment switches are located on the sides of the seats facing the door. The contour of the backrest is changed by two air cushions. They are filled by a pump and valve block.

The following adjustments can be implemented with this switches:
- Lower
- Lift
- Inflate
- Deflate

Lumbar support components
- Switch block (load-switching)
- Pump with pressure control valve
- Valve block with 4 solenoid valves
- 2 air cushions