Pre-Safe; System - Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual

56 Occupant safety
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PRE-SAFE

system

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PRE-SAFE (anticipatory occupant protection)
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PRE-SAFE is able to detect certain critical driv-
ing situations and implement pre-emptive meas-
ures to protect the vehicle occupants.
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PRE-SAFE can implement the following meas-
ures independently of each other:
Tightening the seat belts on the driver's seat
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and front passenger seat.
Closing the side windows.
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Vehicles with sliding sunroof: close the sliding
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sunroof.
Vehicles with memory function: move the front
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passenger seat to a more favourable seat
position.
Vehicles with memory function in the rear
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compartment: move the outer rear seats to a
more favourable seat position.
Vehicles with multicontour seat: increase the
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air pressure in the seat side bolsters of the
seat backrest.
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PRE-SAFE Sound: provided that the multime-
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dia system is switched on, generates a brief
noise signal to stimulate the innate protective
mechanism of a person's hearing.
* NOTE Damage caused by objects in the
footwell or behind the seat
The automatic adjustment of the seat position
may result in damage to the seat and/or the
object.
Stow objects in a suitable place.
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Reversing the PRE-SAFE ® system measures
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
You will need to perform certain settings yourself.
If the seat belt pre-tensioning is not reduced,
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move the seat backrest back slightly.
The locking mechanism releases.
P223 0288 02
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Function of PRE-SAFE PLUS (anticipatory occu-
pant protection plus)
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PRE-SAFE PLUS can detect certain impacts, par-
ticularly an imminent rear impact, and take pre-
emptive measures to protect the vehicle occu-
pants. These measures cannot necessarily pre-
vent an imminent impact.
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PRE-SAFE PLUS can implement the following
measures independently of each other:
Tightening the seat belts on the driver's seat
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and front passenger seat.
Activating the rear hazard warning lights at a
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higher flashing frequency.
Increasing brake pressure when the vehicle is
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stationary. This brake application is cancelled
automatically when the vehicle pulls away.
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
System limits
The system will not initiate any action in the fol-
lowing situations:
when reversing
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