Hi, the L322 has started dropping overnight - rear to the full bottom, front just halfway down. Two days ago I disconnected the battery after rising it up to normal hight, and after the compressor had filled up the reservoir. The compressor is 1 year old.
After 2 days standing with the battery disconnected, it hasn't lowered anything, all corners look 100% fine! So no air leak, but what can cause the car to lower when the battery is connected? L460 P550e AB SWB MY24
L322 TDV8 Vogue MY07
Mini Cooper S Convertible

Almost certainly a faulty height sensor which is giving an incorrect height value to the ECU which then tries to level the car after shutdown. Have a look at the 4x4 screen and see if one of the indicator marks is off level 2012 TDV8 Vogue (L322)

Thanks Jay, will try that. Do you know if this also should be noticeable in the Gap IID tool? I used that tool to adjust the height just before I disconnected the battery, and the GAP IID tool was able to adjust the height with 10 mm down and up (all corners) without any problems. But maybe that could still be done with a faulty height sensor? L460 P550e AB SWB MY24
L322 TDV8 Vogue MY07
Mini Cooper S Convertible

Even better if you have the GAP tool. Do a guided calibration and see whay happens when left overnight? 2012 TDV8 Vogue (L322)

Hi Jay, I re-calibrated the height yesterday using the "Guided tour" in the Gap tool, and it didn't loose any height overnight. Couldn't see any obvious errors of the height sensors constants displayed in the tool during the process.

Edited:
BUT, after the car has been standing today, it has now lowered again. Weird!

I'll try to replace the relay, and then try again leaving it overnight. L460 P550e AB SWB MY24
L322 TDV8 Vogue MY07
Mini Cooper S Convertible

problem could be a worn seal in a valve block had a similar problem myself ,got a valve rebuild kit from 4x4airseals.com around £18-20 takes about hour and half to two hours .  2008 3.6 tdv8 range rover Vogue Stornoway grey - Parchment Leather

On Monday evening I replaced the relay for the air suspension, and the car has been parked since. No air leaks and car still levelled at the correct height for all 4 corners.

So I guess that it must have been just a faulty relay that caused the car to drop to the absolute bottom.
Or could it still be an intermitted seal leak in the valve block, Will? L460 P550e AB SWB MY24
L322 TDV8 Vogue MY07
Mini Cooper S Convertible

well fingers crossed all sorted ,if so nice easy quick cheap fix  2008 3.6 tdv8 range rover Vogue Stornoway grey - Parchment Leather