Air Suspension Calibration

[axelemils]

I have a hard time understanding the Air Suspension Calibration function. None of the stated values are even close to the real life measurements on my car. While the scan states that all 4 wheels are at 380mm +/- 2mm, when I measure, like the info box tells me, the front is 430mm and rear is 480mm. Is the reading wrong, am I measuring incorrectly? Like the box says, I measure from the center point of the wheel, straight up until I hit the black plastic on the fender around the wheel house. Volvo V90 CC MY18