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workshop immediately and have the roll bar
checked.
PRE-SAFE
®
system
G
Warning
The PRE-SAFE
®
system reduces the impact of
an accident on vehicle occupants, as long as
their seat belts have been fastened correctly.
Although your vehicle is equipped with a PRE-
SAFE
®
system, the possibility of injury in the
event of an accident cannot be ruled out. You
should therefore always drive carefully and
adapt your driving style to the prevailing road,
weather and traffic conditions.
PRE-SAFE
®
takes pre-emptive measures to
protect the occupants in certain hazardous
situations.
PRE-SAFE
®
intervenes:
R
in emergency braking situations, e.g. if BAS
is activated or, on vehicles with DISTRONIC
PLUS, if BAS PLUS or PRE-SAFE
®
Brake
intervenes powerfully
R
if the radar sensor system detects an
imminent danger of collision in certain
situations (on vehicles with DISTRONIC
PLUS)
R
in critical driving situations, e.g. when
physical limits are exceeded and the
vehicle understeers or oversteers severely
or when having to swerve to avoid an
obstacle at a speed above 85 mph
(140 km/h).
PRE-SAFE
®
takes the following measures
depending on the hazardous situation
detected:
R
the front seat belts are pre-tensioned.
R
under accident conditions, the front-
passenger seat is adjusted if it is in an
unfavorable position.
R
increases the air pressure in the side
bolsters of the seat cushion and seat
backrest of the multicontour seats in the
front.
R
Coupe: if the vehicle skids, the panorama
sliding sunroof and the front side windows
are closed so that only a small gap remains.
R
Cabriolet: if the vehicle skids, the front side
windows are closed so that only a small gap
remains.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE
®
slackens
the belt pretensioning. The air pressure in the
side bolsters on the multicontour seat is
reduced again. All settings made by PRE-
SAFE
®
can then be reversed.
If the seat belts are not released:
X
When the vehicle is stationary, move the
backrest or seat back slightly.
The belt pretensioning is reduced and the
locking mechanism is released.
G
Warning
Make sure that nobody can become trapped
as you adjust the seat.
!
Make sure that there are no objects in the
footwell or behind the seats when resetting
the seats. There is a risk that the seats
and/or the objects could be damaged.
More information about belt adjustment, a
convenience function integrated into PRE-
SAFE
®
, can be found in the "Belt adjustment"
section (Y page 56).
NECK-PRO head restraints
The NECK-PRO head restraints increase
protection for the driver's and front-
passenger's head and neck. In the event of a
rear collision of a certain severity, the NECK-
PRO head restraints on the driver's and front-
passenger seats are moved forwards and
upwards. This provides better head support.
G
Warning
Do not secure any objects (e.g. coat hangers)
on the NECK-PRO head restraints. Otherwise,
Occupant safety
51
Safety
BA 207 USA, CA Edition B 2011; 1; 3, en-US
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