Emergency tensioning retractor (etr), Emergency tensioning retractor, Etr) – Mercedes-Benz 2002 G-Class User Manual
Page 68
 
65
Restraint systems
Technical
data
Instruments 
and controls
Operation
Driving
Instrument
cluster display
Practical hints
Car care
Index
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.
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.
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