Form 2002 BMW X5 Brochure:

"The X5's fully independant suspension delivers the comfortable ride and excellent handing for which BMW's are famous. It uses the same advanced patented suspension concepts and components found on BMW sports sedans and coups.

Passengers also enjoy a comfortable ride thanks in part to twin-tube gas pressure shock absorbers. Located as far apart as possible to mazimize cargo space, these shocks incorporate two sets of internal valves to smooth over bumps, yet still maintian remarkable firm handling. The system adjusts to uneven and shifting load weights and even takes dynamic driving maneuvers into account.

The 4.6is and the 4.4i feature air springs on the rear axle, replacing conventional steel springs. These are pressurized by an electronic motor powered compressor. Combined with the vehicle's electronically controlled self-leveling, this offers two benefits:

First, the vehicle height remains nearly constant, regardless of load.

Second, the load-bearing air springs help provide optimium ride comfort at all times."