D.Benefit that technology invented.

Ø  Soft suspension for cruising and allowing the driver to cruise in comfort and still enjoy a responsive car (Chris L.1994-2012).

Ø  It also moves substantially towards eliminating body roll and if used for a sportier driver will save tyre wear as well (Wikipedia May 2009) .

Ø  The continuous self-levelling function also rids suspension design of a number of unwanted compromises that commonly designers of steel-sprung cars have to incorporate: as the suspension is always functioning around one predetermined position, no matter the car's load, the various suspension-geometry issues become a much simpler equation to solve (Wikipedia May 2009).

Ø  As stated Wikipedia May 2009,the same natural law governing gases also ensures that the suspension's spring-rate (hardness) is continuously adapted to the weight it has to carry, and to infinite positions. For example, when the car is standing empty, the pressure within its spheres is in balance. If one passenger enters the car, this pressure becomes higher by the value of his weight . The car will have lost some height, so the self-leveling system immediately reacts and brings the car up to the predetermined ride height. The result is that the spring rate is kept constant, regardless of the load of the car.

Ø  Hydractive so effective is its fast-reacting brainpower. Powerful computer analysis the data acquired by speed, g-force, throttle, brakes and gearbox sensors, then decide the most suitable setting and activate the valves via solenoid and sophisticate power electronics (Mark W,1998-2011).

Ø  Happen without driver intervention,though manual selector will hold the suspension

( Stephen H,1989) .

                                  Comparison before and after with hydractive suspension.