Active Head Restraints - Mercedes-Benz 2009 CLS-Class Operator's Manual

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PRE-SAFE takes action in:
Emergency braking situations, e.g. if the
R
Brake Assist System (BAS) (
activated.
Critical dynamic driving situations, e.g.
R
when the vehicle is understeering or over-
steering because it has exceeded its phys-
ical limitations or in case of evasive
steering maneuvers at speeds above
approximately 85 mph (140 km/h).
When you are driving faster than 20 mph
®
(30 km/h), PRE-SAFE takes the following
measures in such situations:
The front seat belts are pre-tensioned auto-
R
matically.
If the passenger seat is in an unfavorable
R
position, it will be adjusted to a better posi-
tion.
If the vehicle is in a critical dynamic driving
R
situation, the door windows and the tilt/
sliding sunroof also close until only a small
gap remains.
If the closing procedure of the tilt/sliding
sunroof or door windows is blocked, the
tilt/sliding sunroof or door windows will
stop and open slightly.
Once the hazardous situation is over without
an accident occurring, the seat belt pre-ten-
sioning is deactivated. You can readjust all of
Y page 66) is
the settings made by PRE-SAFE
If the seat belts do not release:
X
Adjust the seat backrest or seat slightly to
the rear until the seat belt tension is dimin-
ished.
The locking mechanism releases.
! When moving the seats, make sure there
are no items in the footwell or behind the
seats. Otherwise, you could damage the
seats.

Active head restraints

The active head restraints are intended to
offer the driver and front passenger increased
protection from whiplash-type injuries. In the
event of a rear-end collision, the active head
restraints on the driver's and front passen-
ger's seats are designed to move forward in
the direction of travel, providing the head with
increased support earlier on in the collision
sequence. The active head restraints move
forward whether the seat is occupied or not.
G Warning!
Do not attach any objects (e.g. hangers) to
the head restraint posts. Otherwise, the
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.
active head restraints may not be able to
function properly or offer the intended
degree of protection they were designed for
in the event of a rear-end collision.
If the active head restraints have been trig-
gered in an accident, the active head
restraints must be reset. Otherwise, the
active head restraints cannot offer any addi-
tional protection in the event of another rear-
end collision.
For information on resetting the activated
active head restraints, see "Resetting acti-
vated head restraints" (
You cannot remove the active head restraint
on the driver's and front passenger's seats.
For removal contact an authorized Mercedes-
Benz Center.
G Warning!
Only use seat or head restraint covers
which have been tested and approved by
Mercedes-Benz for your vehicle model.
Using other seat or head restraint covers
may interfere with or prevent the activation
of the active head restraints and/or the
Safety and security
Occupant safety
Y page 305).
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