on the right side of the headlight switch is another switch, that has a picture of a car with three LEDs and an UP and DOWN buttons... that is the manual regualtion of the ground clearance. the DOWN button puts the car into ACCESS mode, when all 4 corners of the car are lowered to fascilitate the entry/exit into the car.

if your car is lower than normal by itself, without you lowering it, than something is leaking air, either the bags are defective (more likely) or the valve are bad... since all 4 are lowered at the same lavel (based on your brief description) there could be other issues... You need to have the system tested, or give us more details