Adding to the feeling of stability and security is the standard Porsche Traction Management (PSM) system. Along with permanent all-wheel drive, it helps to ensure the 2006 Porsche Cayenne Turbo S rarely stumbles on its way to terrifying your passengers. Under most driving conditions, 62 percent of the power is delivered to the rear wheels and 38 percent to the fronts, but should PSM detect slippage, it uses sensors to measure speed, lateral acceleration, steering angle and how far down you have the gas pedal jammed to make appropriate adjustments. It’s capable of transferring up to 100 percent of engine’s power to either the front or rear axle for maximum traction.