ride quality. In 2006 Toyota introduced its Active Stabilizer Suspension System. By altering anti-roll bar stiffness, this system acts to reduce body tilt during cornering, keeping the vehicle more level during turns and improving handling, as opposed to the natural tendency of a vehicle to roll due to the lateral forces experienced during high-speed maneuvering. The active stabilizer system relies on vehicle body sensors and electric motors. The first production usage of this system was introduced in August 2005 with the Lexus GS430 sport sedan. Porsche Cayenne introduced Porsche Dynamic Chassis Control (PDCC), a system with active roll-bars in 2007 (on European market). In 2011, the third generation Mercedes-Benz M-Class introduced a similar system: ACTIVE CURVE SYSTEM. Range Rover Sport introduced Dynamic Response active anti-roll bars. Mercedes-Benz S-Class Active Body Control system uses another approach: the computer uses sensors to detect lateral load, lateral force, and height difference in the suspension strut, then uses hydraulic pressure to raise or lower the spring to counter roll. This system removes the anti-roll bar. Most active roll control systems allow a small degree of roll to give a more natural feel. Toyota also uses a mechanical system called Kinetic Dynamic Suspension System (KDSS) that essentially disengages the stabilizer bars when off-road, allowing for greater vehicle articulation and ride quality. See also Panhard rod Torsion bar suspension References Canadian inventions Automotive suspension technologies Automotive safety technologies Auto parts Mechanical power control