Here's a shot from the back seat. Note the four air valves mounted between the front seats, layed out logically so the front right valve controls the inflating/deflating of front right air bag, etc. Simply lift up on the valve to inflate and down to deflate. You can either partially inflate or deflate any bag or combo of bags or make slight adjustments either up or down depending on the terrain. The underhood Cat Tu Flow belt driven, engine oil lubed and coolant cooled compressor tries to maintain a constant 100 psi in the system using the front bumper, and 2 more tanks in the rear as a reserve. It will go from 0psi to 100psi in about 60-90 secs with all valves closed.
I'll take some pics of the rear steer joystick tonight. It's on the floor just in front of the right corner of the driver's seat, under where your right thigh would normally be.