Wonky Air Suspension!

My air suspension seems to be, well, not level.
I can't decide whether it's the offside front that is over inflating or the nearside rear that is under inflating, but all airbags do inflate and I can't hear any leaks. Any ideas?
So basically, the drivers side front sits slightly higher than the rest yet the passenger side rear sits slightly lower than all the rest. I'm confused!

To see whether it is indeed not level, park it on as flat a surface as you can find, and measure from ground level to the centre of wheel arch for each wheel.

That will tell you whether you have a problem or not, and if you do then a recalibration of the system should do the trick, either thru main dealer, independant or yourself if you have the PC/electronics skills.

Ta very muchly.