Emergency Tensioning Retractor (Etr) - Mercedes-Benz G Series Operator's Manual

Emergency tensioning retractor (ETR)

The seat belts for the front seats and outboard
passenger seats are equipped with emergency
tensioning retractors. These tensioning retractors are
located in each seat belt buckle and become
operationally ready with the key in starter switch
position 1 or 2.
The emergency tensioning retractors are designed to
activate only when the seat belts are fastened during
frontal impacts exceeding the first threshold of the SRS
and in rear impacts exceeding a preset severity level.
They remove 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, angled impacts, roll-
overs, certain side impacts, or other accidents without
sufficient frontal or rear impact forces, the emergency
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 tensioning retractor see
page 71.
Restraint systems
Instruments
Operation
and controls
Instrument
Driving
cluster display
Note:
The emergency tensioning retractors for the driver and
front passenger seats will only deploy if the front seat
belts are buckled.
The rear center automatic two point seat belt is not
equipped with an emergency tensioning retractor.
65
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