Emergency Tensioning
Retractor (ETR)
The seat belts for the front seats
are equipped with emergency ten
sioning retractors. These tension
ing retractors are located in each
belt’s inertia reel and become
operationally ready with the key in
steering lock position 1 or 2.
The emergency tensioning re
tractors are designed to activate
only when the seat belts are
fastened during frontal and front
angled impacts exceeding the first
threshold of the SRS. They re
move slack from the belts in such
a way that the seat belts fit more
snugly against the body restricting
its forward movement as much as
possible.
In cases of other frontal impacts,
roll-overs, certain side impacts,
rear collisions, or other accidents
without frontal forces, the emer
gency tensioning retractors will not
be activated. The driver and
passengers will then be protected
by the fastened seat belts and
inertia reel in the usual manner.
For seat belt and emergency ten
sioning retractor safety guidelines
see
Safety Guidelines
in Index.
Airbags
The most effective occupant re
straint system yet developed for
use in production vehicles is the
seat belt. In some cases, however,
the protective effect of a seat belt
can be further enhanced by an
airbag.
The driver airbag (1) is located in
the steering wheel hub. The pas
senger airbag (2) is located in the
dashboard ahead of the passen
ger. In conjunction with wearing
the seat belts with emergency
tensioning retractors (4), the
airbags can provide increased
protection for the driver and
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Содержание C 220 1996
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