Mercedes-Benz 190 E 2.6 1989 Owner's Manual page 42

SUPPLEMENTAL RESTRAINT
SYSTEM (SRS)
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.
40
The emergency tensioning retractors
are designed to activate only when the
seat belts are fastened during major
frontal impacts within the shaded area
shown. They tighten the belts in such
a way that they fit more snugly against
the body restricting its forward move­
ment as much as possible.
In cases of less severe frontal
impacts, roll-overs, certain side
impacts, rear collisions, or other ac­
cidents without major 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.
For seat belt and emergency tension­
ing retractor safety guidelines, see
page 42.