The airbag modules and belt tensioners may contain perchlorate. Please comply with
legislation regarding disposal.
Proactive occupant protection system
First read and observe the introductoryinformation and safety warnings
⇒
Introduction
The proactive occupant protection system is an assistance system that initiates action to protect
vehicle occupants in dangerous situations. However, the system cannot prevent a collision.
The full range of functions of the proactive occupant protection system will be available only if the
function has been activated in the Infotainment system, no special driving profile has been selected
and there are no malfunctions
⇒
Driving profile selection and 4MOTION Active Control
,
⇒
Function
limitations
.
Basic functions
Depending on country-specific legal requirements and also on the vehicle equipment, the following
functions may be initiated, either individually or jointly, in critical situations (e.g. emergency braking
or in the case of oversteering or understeering) as of a speed of approximately 30 km/h (19 mph):
• Temporary tensioning of the fastened front seat belts.
• Automatic closing of the glass roof and side windows down to a gap, depending on the vehicle
equipment.
The belts may be tensioned individually or together depending on the respective critical driving
situations.
Additional information for vehicles with an area monitoring system (Front
Assist)
In vehicles fitted with the area monitoring system (Front Assist)
⇒
Area monitoring system (Front
Assist)
, the probability of a collision with the vehicle ahead is also calculated within the system
limits. The system can trigger the proactive occupant protection system if it detects a probable
collision or initiates strong braking.
Settings in the Infotainment system
The full range of functions of the proactive occupant protection system can be activated and
deactivated in the Infotainment system
⇒
Operation and display in the Infotainment system
.
The proactive occupant protection system will be reactivated every time the ignition is switched on.
It may not be possible to operate the setting function if the proactive occupant protection system
has already been adapted to the specific vehicle setup.
Setting in driving profile selection
In vehicles with driving profile selection, the proactive occupant protection system is adapted to the
special vehicle setup of the respective driving profile
⇒
Driving profile selection and 4MOTION
Active Control
.
Function limitations
The proactive occupant protection system will not be available, or will only be available to a limited
extent, in the following situations:
• If there is a fault in the ESC, belt tensioner or in the airbag control unit
⇒
Seat belts
or
⇒
Airbag
system
.
• When the TCS or ESC are switched off, and when the vehicle is reversing
⇒
Brake support
systems
.
• The temporary tensioning for the front passenger seat is switched off if the front passenger front
airbag is deactivated.
• If there is a system fault in the area monitoring system (Front Assist)
⇒
Area monitoring system
(Front Assist)
.
The risk of severe or fatal injuries may be increased if the seat belts, automatic belt
retractors and belt tensioners are not used correctly, or if they are repaired by a non-
professional. As a result, the belt tensioners may not be triggered when they should, or
they may be triggered unexpectedly.
• Any repairs, adjustments or removal and refitting of parts in the belt tensioners or seat
belts should always be carried out by a qualified workshop and never by yourself
⇒
Accessories, modifications, repairs and renewal of parts
.
• Belt tensioners and automatic belt retractors cannot be repaired. They must be
replaced.
WARNING
