[Delboy]

Looking at the schematic in that attachment if the car tries to raise its self with the compressor remove it will drop to the floor as the will be nothing downstream of the solenoid block to prevent the air escaping.

If the car is still at a sensible ride height you could disconnect the cabling from the valve block, that would prevent the air springs from discharging providing there is no leaks of course.

There is something else you could possibly try but I can not say for sure, if you go into the mmi and put the car into jacking mode then it should not try to adjust the air in the system but you can not go above 9 mph so its not going to help if you have to travel in the car and would be best if you disconnect the wiring from the valve block.