Rancho Air Suspension?

I've just bought a Discovery 1 and I think it is fitted with some sort of air pressure adjustable suspension.
On the centre cubby are three buttons, one appears to control some sort of pump / compressor and the other 2 appear to vent air pressure when pressed.
On the dash are 2 gauges, which appear to be pressure, the readings on both increase when the single button is pressed and reduce when either of the other 2 are pressed ( each button seems to relate to one of the gauges).
The gauges have the name "Rancho" and they are marked "soft" at the low end and "Firm" at the high range.
Anybody any ideas what this system might be and how it should be used?

Thanks in anticipation

Martin

Hi there, personally never heard of Rancho Air suspension, BUT, i did google "Rancho Air Suspension and received plenty of entries. Try that and go on from there

hope this helps

Jim A
1996 Disco 300Tdi auto (Jaap reimport)