Basic functions
At the beginning of every journey, the belt is automatically pre-tensioned and the belt slack minimised when the driver or front
passenger seat belt is fastened, depending on the driving time and vehicle speed.
The following functions may be triggered individually or together in critical driving situations, e.g. in the event of emergency braking,
understeer and oversteer or minor collisions:
—Reversible belt tensioning of the fastened driver and front passenger seat belts.
—Automatic closing of the glass roof and side windows down to a gap, depending on the vehicle equipment.
—Activation of the hazard warning lights.
The belts may be tensioned individually or together depending on the respective critical driving situations.
Additional functions for vehicles with Automatic Emergency Braking (Front Assist)
For vehicles with Automatic Emergency Braking (Front Assist), the system limits also include calculation of the probability of a rear-end
collision with the vehicle in front. If the system detects that a rear-end collision is likely, or initiates severe braking, it can trigger the
proactive occupant protection system.
Additional functions for vehicles with lane change system (Side Assist)
In vehicles fitted with a lane change system (Side Assist), the probability of a collision with the vehicle following behind is also
calculated within the system limits. The system can trigger the proactive occupant protection system if it detects a probable collision
with the vehicle ahead. If the risk of a collision is detected, the hazard warning lights can also be activated with a rapid hazard warning
flashing frequency in addition to the basic function of the proactive occupant protection system.
Additional functions for vehicles with Emergency Assist
The proactive occupant protection system may be triggered in vehicles with Emergency Assist if no driver activity is detected.
Depending on the activation level, the following functions are triggered:
—Reversible belt tensioning of the driver’s fastened seat belt for a brief or extended period of time.
—Automatic closing of the glass roof and side windows down to a gap, depending on the vehicle equipment.
Additional functions for vehicles with Front Cross Traffic Assist
In vehicles fitted with Front Cross Traffic Assist, the probability of a side collision caused by a crossing vehicle is also calculated within
the system limits. The system can trigger the proactive occupant protection system if it detects a probable side collision. If the risk of a
collision is detected, the hazard warning lights can also be activated in addition to the basic function of the proactive occupant
protection system.
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.
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