PRE-SAFE
®
takes the following measures
depending on the hazardous situation detected:
R
the front seat belts are pre-tensioned.
R
if the vehicle skids, the side windows and the
panorama roof with power tilt/sliding panel
are closed.
R
the front-passenger seat is adjusted if it is in
an unfavorable position.
R
for vehicles with electrically adjustable rear
seats: the outer rear seats are adjusted if they
are in an unfavorable position.
R
vehicles with a multicontour seat: the air pres-
sure in the side bolsters of the seat backrest
is increased.
R
vehicles with seat belt extenders: the seat
belts of the outer rear seats are pre-ten-
sioned.
If the hazardous situation passes without result-
ing in an accident, PRE-SAFE
®
slackens the belt
pre-tensioning. On vehicles with multicontour
seats, the air pressure in the side bolsters is
reduced again. All settings made by PRE-SAFE
®
can then be reversed.
If the seat belt pre-tensioning is not reduced:
X
Move the seat backrest or seat back slightly
when the vehicle is stationary.
The seat belt pre-tensioning is reduced and
the locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE
®
convenience function. Informa-
tion about the convenience function can be
found under "Belt adjustment" (
Y
page 47).
PRE-SAFE
®
PLUS (anticipatory occu-
pant protection system PLUS)
Introduction
PRE-SAFE
®
PLUS is only available in vehicles
with the Driving Assistance package.
Using the radar sensor system, PRE-SAFE
®
PLUS is able to detect that a head-on or rear-end
collision is imminent. In certain hazardous sit-
uations, PRE-SAFE
®
PLUS takes pre-emptive
measures to protect the vehicle occupants.
Important safety notes
The intervention of PRE-SAFE
®
PLUS cannot
prevent an imminent collision.
The driver is not warned when PRE-SAFE
®
PLUS
intervenes.
PRE-SAFE
®
PLUS does not intervene if the vehi-
cle is backing up.
When driving, or when parking or exiting a park-
ing space with assistance from Active Parking
Assist, PRE-SAFE
®
PLUS will not apply the
brakes.
Function
PRE-SAFE
®
PLUS intervenes in certain situa-
tions if the radar sensor system detects an
imminent head-on or rear-end collision.
PRE-SAFE
®
PLUS takes the following measures
depending on the hazardous situation detected:
R
if the radar sensor system detects that a
head-on collision is imminent, the seat belts
are pre-tensioned.
R
if the radar sensor system detects that a rear-
end collision is imminent:
-
the brake pressure is increased if the driver
applies the brakes when the vehicle is sta-
tionary.
-
the seat belts are pre-tensioned.
The PRE-SAFE
®
PLUS braking application is can-
celed:
R
if the accelerator pedal is depressed when a
gear is engaged
R
if the risk of a collision passes or is no longer
detected
R
if DISTRONIC PLUS indicates an intention to
pull away
If the hazardous situation passes without result-
ing in an accident, the original settings are
restored.
Automatic measures after an acci-
dent
Immediately after an accident, the following
measures are implemented, depending on the
type and severity of the impact:
R
the hazard warning lamps are activated
R
the emergency lighting is activated
R
the vehicle doors are unlocked
58
Occupant safety
Safety
