For the rear, apparently you can test with spring pressure on but likely only with badly worn. People use different methods to compress the spring to take off tension when not air suspension including creative ways to connect to top of a bottle jack.

I'm about to replace all my back control arms and should have some very helpful details to share. (including the actual reason behind inside tire wear); spoiler alert, not camber.

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