Emergency Tensioning Retractor
(ETR)
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 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 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, 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.
Airbags
The driver airbag (1) is located in the
steering wheel hub. The passenger
airbag (2) is located in the dashboard
ahead of the passenger. In conjunction
with wearing the seat belts with
emergency tensioning retractors (4),
the airbags can provide increased
protection for the driver and
The most effective occupant restraint
system yet developed for use in
production vehicles is the seat belt. In
some cases, however, the protective
effect of a seat belt can be further
enhanced by an airbag.
For seat belt and emergency tensioning
retractor safety guidelines see Safety
Guidelines in Index.
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| Categories | Mercedes-Benz Manuals, Mercedes-Benz S-Class Manuals |
|---|---|
| Document Type | Free Auto PDF Vehicle Owner's Manual Download |
| Tags | Mercedes-Benz S500, Mercedes-Benz S600, Mercedes-Benz W140 |
| Download File |
|
| Document File Type | |
| Publisher | bayhas.com |
| Wikipedia's Page | Mercedes-Benz S-Class |
| Copyright | Attribution Non-commercial |
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