At one stage I suspected the o-ring on the pressure switch and replaced it, causing the accumulator to be re-filled and a computer reset to default.

After the reset the height returned to normal, but it drops as soon as the car is switched of for longer than 15 minutes. What is funny about the whole thing is that the front only dropped between 10-15mm and both sides at the same time. a Check of the links and connection points with soapy water reveals no bubbles, therefore I suspect the problem to be somewhere else. Computer, Air Bags, Control unit, Valve body or compressor can all be culprits.

The next flippen thing that happens after a few of these "get up and go" sessions is the error message of "air suspension inactive" appears, the height selector button sticks to normal and the front stops lifting - again a Reset is needed!!

Can a leaky air bag leaks to a point and then stops and both at the same time?

I hope there is an answer to this problem as I am getting frustrated with BMW and their suspension.