Safety and environment | Safety · 71
For added safety, the system also read-
ies the brakes whenever a decreasing
distance to the vehicle in front is detect-
ed. The optional adaptive cruise control
and PSM interact to prefill the brakes.
Even if adaptive cruise control is inactive,
the system registers the speed of the
vehicle in front and automatically readies
the braking system. In addition, the sys-
tem alerts the driver to the decreasing
distance by briefly tugging on the
brakes.
PSM also features a trailer stabilisation
function – for a significant contribution
to car and trailer safety. Within the laws
of physics, it compensates for load
transfer caused by throttle and brake
inputs up to the maximum degree of
lateral acceleration. It also enhances the
car’s driving dynamics and directional
stability when accelerating on inconsis-
tent road surfaces.
Other features include a special control
strategy in the ABS for braking on loose
surfaces. By briefly locking the wheels,
a wedge is formed ahead of each tyre
which provides additional purchase to
help slow the car, e.g. on gravel or snow.
For a more involving driving experience,
PSM can also be disabled, but remains
active in the background.
Standard on all Cayenne models.
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