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or
R
the vehicle is stationary and a door is open
i
For more information on the 7 seat
belt warning lamp, see "Indicator and
warning lamps in the instrument cluster,
seat belt" (Y page 237).
Emergency Tensioning Devices and
seat belt force limiters
The seat belts for the following seats are
equipped with ETDs and belt force limiters:
R
driver's and front-passenger seat
R
the outer seats in the second row
R
the seats in the third row
!
If the front-passenger seat is not
occupied, do not engage the seat belt
tongue in the buckle on the front-
passenger seat. Otherwise, the Emergency
Tensioning Device could be triggered in the
event of an accident.
The belt tensioners tighten the seat belts in
an accident, pulling them close against the
body.
ETDs do not correct incorrect seat positions
or incorrectly fastened seat belts.
ETDs do not pull vehicle occupants back
towards the backrest.
Seat belt force limiters, when activated, are
employed to help reduce the force exerted by
the seat belts on occupants during a crash.
The front belt force limiters are synchronized
with the front air bags, which take on a part
of the deceleration force. Thus, the force
exerted on the occupant is distributed over a
greater area.
The belt tensioners can only be activated
when:
R
the ignition is switched on
R
the restraint systems are operational; see
"SRS warning lamp" (Y page 36)
R
the belt tongue is engaged in the buckle on
each of the three-point seat belts in the
front
R
the front-passenger seat is occupied and
the belt tongue is engaged in the buckle on
the front-passenger side.
The ETDs on the outside seats in the second
row and on the seats in the third row are
triggered independently of the lock status of
the seat belts.
The ETDs are triggered depending on the type
and severity of an accident:
R
in the event of a head-on or rear-end
collision if the vehicle decelerates or
accelerates rapidly in a longitudinal
direction during the initial stages of the
impact
R
in the event of a side impact if the vehicle
is subjected to high lateral acceleration/
deceleration.
R
in certain situations if the vehicle overturns
and the system determines that it can
provide additional protection.
If the air bags are deployed, you will hear a
bang and a small amount of powder may also
be released. Only in rare cases will the bang
affect your hearing. The powder that is
released generally does not constitute a
health hazard. The + SRS warning lamp
lights up.
G
Warning
Pyrotechnic ETDs that were activated must be
replaced.
For your safety, when disposing of the
pyrotechnic ETDs always follow our safety
instructions. These instructions are available
from any authorized Mercedes-Benz Center.
The PRE-SAFE
®
system is equipped with
electrically resettable seat belt tensioners
that do not need replacing after deployment.
58
Occupant safety
Safety
BA 251 USA, CA Edition A 2011; 1; 3, en-US
d2sboike Version: 3.0.3.5
2010-04-16T14:31:55+02:00 - Seite 58