(The button with the shock absorber image ) PASM = Porsche Active Suspension Management When sudden braking is detected, the brake assist function applies maximum brake pressure to all four wheels. Maximum braking power is therefore achieved much sooner. With the braking system having been precharged, the brake pads are already in light contact with the brake discs. If you suddenly release the accelerator pedal, PSM automatically readies the braking system. PSM has been enhanced and now includes two additional functions: precharging of the brake system, and brake assist. However, it is automatically reactivated for your safety if either of the front wheels (in ‘Sport’ mode, both of the front wheels) requires ABS assistance. For an even sportier drive, PSM can be deactivated. The integrated ABS can further reduce the braking distance. When ‘Sport’ mode is selected on the optional Sport Chrono Packages, the PSM intervention threshold is raised to enable greater driver involvement – particularly at speeds of up to approximately 70 km/h (45 mph). Under acceleration on wet or low-grip road surfaces, PSM improves traction using the ABD (automatic brake differential) and ASR (anti-slip regulation) functions, giving an agile response. If this direction deviates from the desired course, PSM initiates braking interventions targeted at individual wheels in order to stabilise the vehicle. Using this information, PSM computes the actual direction of motion. Sensors continuously monitor driving direction, speed, yaw velocity and lateral acceleration. PSM, which comes as standard, is an automatic control system that stabilises the vehicle at the limits of dynamic driving performance.
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