Smart Technologies smart forfour 454 - Manual (Page 34)

Observing occupant restraint systems
Guidelines for Rescue Services, smart, 2006 Page 33
Rescue
Seat belts
The seat belt buckles can usually be opened
normally after a crash.
However, it is often easier to cut the belts at an
easily accessible point. In this way the rescue
crew do not need to lean over the casualty, which
might cause further discomfort or injury.
Furthermore, leaving the belt buckle fastened
provides the police with evidence that the belt
was being worn.
Emergency tensioning retractors
The emergency tensioning retractors are acti
vated in frontal collisions with a sufficiently high
deceleration acting in the longitudinal direction
or in rear end collisions with a sufficiently high
acceleration acting in the longitudinal direction.
The emergency tensioning retractors are inte
grated into the seat belt inertia reel mechanisms.
Because different activation strategies are used
the retractors may therefore be triggered both
when the belt is being worn and when it is not.
i When the emergency tensioning retractors
are activated, the belt is retracted by max.
150 mm. The retractors cannot be triggered
after the battery has been disconnected.