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Safety and Security
Occupant safety
intensity for a maximum of 60 seconds
or until the driver’s and the front
passenger’s seat belt are fastened.
If you and/or your front passenger
release the seat belt during driving, the
seat belt telltale < starts flashing
and a warning chime sounds as
described before.
If the driver’s or the front passenger’s
seat belt remains unfastened after
60 seconds, the warning chime stops
sounding, the seat belt telltale <
stops flashing but continues to be
illuminated.
After a vehicle standstill, the warning
chime reactivates and the seat belt
telltale < flashes again when the
vehicle speed exceeds 15 mph
(25 km/h).
The seat belt telltale < will only go out
if both the driver’s and the front passen-
ger’s seat belt (with the front passenger
seat occupied) are fastened, or the vehicle
is standing still and a front door is opened.
For more information, see “Practical hints”
(
୴ page 380).
Emergency tensioning device (ETD),
seat belt force limiter
The seat belts are equipped with Emergen-
cy Tensioning Devices (ETDs) and seat 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 382)
In an impact, the ETDs remove slack from
the seat belts in such a way that the seat
belts fit more snugly against the body. Seat
belt force limiters, when activated, are em-
ployed to help reduce the peak force exert-
ed by the seat belts on occupants during a
crash.
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 seats will activate with or
without the respective seat belt fastened.
i
ETDs do not correct an incorrect seat posi-
tion or incorrectly worn seat belts.
ETDs do not pull occupants back toward the
backrest.
Warning! G
A pyrotechnic Emergency Tensioning Device
(ETD) that was activated must be replaced.
When disposing of the pyrotechnic Emer-
gency Tensioning Device (ETD), our safety
instructions must be followed. These are
available at an authorized Mercedes-Benz
Center.