Pre-Safe; Seat Belt Force Limiter; Automatic Comfort-Fit Feature - Mercedes-Benz 2009 S-Class Operator's Manual

The seat belt telltale will only go out if
<
both the driver's and the front passenger's
seat belt (with the front passenger seat
occupied) are fastened, or the vehicle is
standing still and a front door is opened.
For more information, see "Practical
hints" ( Y page 552).
Emergency Tensioning Device (ETD),

seat belt force limiter

The seat belts for the front seats and rear
outer seats are equipped with ETDs and seat
belt force limiters.
The ETDs are designed to activate in the
following cases:
in frontal or rear-end impacts exceeding
R
the system's preset deployment threshold
in side impacts exceeding the system's
R
preset deployment threshold on the far
side of the impact
in certain vehicle rollovers
R
if the restraint systems are operational and
R
functioning correctly, see
=
lamp ( Y page 45)
The ETDs for the front seats will only activate
if the front seat belts are fastened (latch plate
properly inserted into buckle).
The ETDs for the rear outer seats will activate
with or without the respective seat belts
fastened.
In an impact, the ETDs remove slack from the
seat belts in such a way that the seat belts fit
more snugly against the body. Seat belt force
limiters, when activated, are employed to
help reduce the peak force exerted by the
seat belts on occupants during a crash.
i The ETDs do not correct an incorrect seat
position or incorrectly worn seat belts.
The ETDs do not pull occupants back
toward the seat backrest.
G Warning!
Pyrotechnic ETDs that were activated must
be replaced.
For your safety, when disposing of the
pyrotechnic ETDs always follow our safety
instructions. These are available at any
authorized Mercedes-Benz Center.
®

PRE-SAFE

has electrically operated
reversible pre-tensioners that do not
require replacement after activation.
indicator
Automatic comfort-fit feature seat belt
An automatic comfort-fit feature for the front
seats and for the rear outer seats (only for
Safety and security
Occupant safety
vehicles with rear power seats) reduces the
retracting force of the seat belts when they
are in normal use.
Preventive occupant safety (PRE-
®
SAFE )
G Warning!
®
PRE-SAFE is intended to reduce the
effects of an accident on vehicle occupants
who are wearing their seat belt properly.
Despite having the PRE-SAFE
your vehicle, the possibility of injuries
occurring as a result of an accident cannot
be eliminated. Therefore, you should
always drive carefully and adjust your
driving to the prevailing road, weather, and
traffic conditions.
Your vehicle takes preventive measures to
better protect the occupants in the following
hazardous situations automatically.
®
PRE-SAFE takes preventive measures in
emergency braking situations, e.g. if the
R
Brake Assist System (BAS) (
activated
or when
®
system in
Y page 70) is
Z
59