Technical data

30
Passenger protection
The mode of operation
The AKS is triggered only by a collision at the
vehicle's rear. In the event of a frontal crash, its
triggering is prevented by a safety block.
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Impeding weight
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Headrests
The front seats in the Phaeton are fitted with an
active headrest system (AKS). Through a forward
displacement of the headrests and the ensuing
avoidance of relative accelerations between the
shoulders and the head, this system lowers the
risk of cervical spine injury in the event of a
crash. The reversible system continues to be fully
operable after the triggering of the AKS.
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The full range of functions as well as the correct protective function of the active headrest system
requires a body-specific seat setting for the respective occupants.
If an accelerating force in the travelling direction
is applied to the rear of the vehicle, the move-
ment of the occupants is delayed by inertia. The
body is therefore pushed into the seat. Due to this
increased pressure on the backrest, a bent lever
is turned in a way which causes the headrest to
move upwards and forwards. This direction is
determined by a rail guide in which the headrest
is located.