I have three Land Rovers and they will self level when stopped for a minute or so and when you shut the car off.I've seen glimpses of this before, but this time I was looking right at it when it happened. I have an upward inclining driveway. I parked and walked around the front of the LR4 to enter the house. I heard a mechanical click and brief hiss. The front end lowered quickly, but in a controlled manner. I think it is the rig trying to level itself.