I have a Range Rover L322 on a 03 plate "air suspension inactive" came on after leaving the car parked for a couple of hours. It was fine before this. I'm a retired mechanic so thought I'd check a few things to see if I could see what the problem was & noticed that the passenger side air bag was completely deflated but all the other corners are fine (i.e. hard). The light on the hight control switch is also out & was working fine before. The rocker switch for the hight has no effect. The air bag looks OK & may have been changed recently as the car has 98000 miles on it but no cracks in the air bag. Anyone got any ideas what could have caused this to happen or a possible cure or things worth checking?