When changing an air spring calibration may be needed (also when changing any control arm where the regulating rod is attached).

First get a photo of all four sensors; with the wheels on the best way to do this is borrow a friend's iPhone and FaceTime between them. Mute the sound or you'll have feedback hell. Then use one phone as the ROV and one as the view screen.

Take screen shots from the view screen phone.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)