Test step/Test scope	Test condition	Nominal value	Possible cause/Remedy 1)
1.0 Changing backrest contour in X-direction (intensity of lower and upper air cushion).	Turn pressure adjuster for upper or lower air cushion slowly from minmum to maximum at least 5 times.	Backrest must change shape noticeably in lumbar support area.	Backrest does not change shape and pump motor in PSE control module (A37) does not run. PSE version coding incorrect, PSE (A37). Backrest does not change shape even though pump motor in PSE control module (A37/5) runs. 32 PSE/OSB 1.0, 32 PSE/OSB 2.0, 33 PSE 7.0
2.0 Changing backrest contour side bolster.	Use side bolster rocker switch to change pressure from minimum to maximum 5 times.	Backrest must change shape noticeably in lumbar support area.	Backrest does not change shape and pump motor in PSE control module (A37) does not run. PSE version coding incorrect, PSE (A37). Backrest does not change shape even though pump motor in PSE control module (A37/5) runs. 32 PSE/OSB 3.0, 33 PSE 7.0
3.0 Changing seat bottom cushion length.	Turn pressure adjuster for seat bottom cushion from minmum to maximum 5 times.	Seat cushion length must change noticeably.	Backrest does not change shape and pump motor in PSE control module (A37) does not run. PSE version coding incorrect, PSE (A37). Backrest does not change shape even though pump motor in PSE control module (A37/5) runs. 32 PSE/OSB 4.0, 33 PSE 7.0

1) Observe Preparation for Test, see 22.