Supplemental Restraint System
(SRS)
Seat belt not fastened
In cases of other frontal impacts, roll-
overs, certain side impacts, rear
collisions, or other accidents without
frontal 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.
•
first threshold exceeded: airbag
activates, but not ETR
Driver and front passenger systems
operate independently from each other.
Emergency Tensioning
Retractor (ETR)
For seat belt and emergency ten-
sioning retractor safety guidelines see
Safety Guidelines in Index.
The seat belts for the front seats
are equipped with emergency
tensioning retractors. These tensioning
retractors are located in each belt's
inertia reel and become operationally
ready with the key in steering lock
position 1 or 2.
The SRS uses two crash severity levels
(thresholds) to activate either the ETR
or airbag or both. Activation depends
on exceeding the thresholds and
fastening of the seat belt.
The emergency tensioning retractors
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.
Seat belt fastened
•
first threshold exceeded:
ETR activates
•
second threshold exceeded:
airbag also activates
50
| Categories | Mercedes-Benz Manuals, Mercedes-Benz S-Class Manuals |
|---|---|
| Document Type | Free PDF Owner's Manual Download. |
| Tags | Mercedes-Benz 300SE, Mercedes-Benz 400SE, Mercedes-Benz 500SEL, Mercedes-Benz W140 |
| Model Year | 1992 |
| Download File |
|
| Document File Type | |
| Publisher | mbusa.com |
| Wikipedia's Page | Mercedes-Benz W140 |
| Copyright | Attribution Non-commercial |
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