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Safety and Security
Occupant safety
Emergency tensioning device (ETD),
seat belt force limiter
The seat belts for the front and rear outer
seats are equipped with emergency ten-
sioning devices and belt force limiters.
The ETD is designed to activate in the
following cases:
ț in frontal or rear-end impacts exceed-
ing the system deployment threshold
ț in certain vehicle rollovers
ț if the restraint systems are operational
and functioning correctly,
see = indicator lamp (
୴ page 552)
In an impact, emergency tensioning
devices remove slack from the belts in
such a way that the seat belts fit more
snugly against the body. Belt force limiters,
when activated, are employed to help
reduce the peak force exerted by the seat
belts on occupants during a crash.
ț When using a seat belt to secure infant
or toddler restraints or children in
booster seats, always follow the child
seat manufacturer's instructions.
i
The ETDs for the front seats will only acti-
vate if the front seat belt is fastened (latch plate
properly inserted into buckle).
The ETDs for the rear outer seats will activate
with or without the respective seat belt fastened.
Warning! G
A pyrotechnic emergency tensioning device
(ETD) that was activated must be replaced.
When disposing of the pyrotechnic emer-
gency tensioning device, our safety instruc-
tions must be followed. These are available
at your authorized Mercedes-Benz Center.
PRE-SAFE
®
has electrically operated
reversible pre-tensioners that do not require
replacement after activation.
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