Mercedes-benz 2002 S 500 User Manual download pdf (Page 93)

100

101

90Restraint 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 and rear outer seats are

equipped with emergency tensioning retractors. These

tensioning retractors are located in each belt’s inertia

reel and become operationally ready with the electronic

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.

Note:

The front passenger ETR activates only if the front

passenger seat is occupied.

Heavy objects on the front passenger seat can appear to

the “SRS” to indicate the presence of an occupant in

that seat which causes the passenger front airbag to

deploy and the ETR to activate in a crash exceeding the

appropriate threshold.

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Mercedes-benz 2002 S 500 User Manual Page 93

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