Supplemental restraint system (SRS)
Emergency tensioning retractor (ETR)
Airbags are intended as a supplement to seat belts.
Airbags alone cannot protect as well as airbags plus
seat belts in impacts for which the airbags were
designed to operate, and do not afford any protection
whatsoever in crashes for which the airbags are not
designed to deploy.
The seat belts 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 and rear 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.
The SRS uses two crash severity levels (thresholds) to
activate either the emergency tensioning retractor (ETR)
or front airbag or both. Activation depends on the
direction and severity of the impact exceeding the
preset thresholds and whether the seat belt is fastened.
Seat belt fastened
In cases of other frontal impacts, rollovers, certain side
impacts, rear collisions or other accidents without
sufficient frontal or rear impact forces, the emergency
tensioning retractors will not be activated. The driver
and passenger will then be protected by the fastened
seat belts and inertia reel in the usual manner.
•
first threshold exceeded:
ETR activates
•
second threshold exceeded:
airbag also activates
Seat belt not fastened
For seat belt and emergency tensioning retractor safety
guidelines see page 66.
•
first threshold exceeded:
airbag activates, but not ETR
Driver and passenger systems operate independently of
each other.
Restraint systems
59
Instruments
and controls
Instrument
cluster display
Technical
data
Operation
Driving
Practical hints
Car care
Index
| Categories | Mercedes-Benz Manuals, Mercedes-Benz SL-Class Manuals |
|---|---|
| Document Type | Free Auto PDF Owners Manual Download. |
| Tags | Mercedes-Benz R129, Mercedes-Benz SL500, Mercedes-Benz SL600 |
| Model Year | 2000 |
| Download File |
|
| Document File Type | |
| Publisher | mbusa.com |
| Wikipedia's Page | Mercedes-Benz SL-Class |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Automotive readers have rated 2000 Mercedes-Benz SL500 SL600 R129 Owners Manual 5.0 out of 5.0 based on 1 product reviews. This review is great for people that bought a car second hand without a operstors manual