Additional side impact protection

Oct 28, 2020
Stuttgart

New protective features for a severe lateral impact are introduced with the new S-Class. A suspension-based function has been added to the innovative PRE-SAFE® Impulse Side: when a side impact threatens, the vehicle body can be raised by the E-ACTIVE BODY CONTROL suspension (optional) within a few tenths of a second.

PRE-SAFE® Impulse Side, an innovation in the Experimental Safety Vehicle ESF 2009, had its world production premiere in 2015. The idea: to make use of the time before the impact, the system moves the occupant away from the door panel and towards the centre of the vehicle just before an impending side collision. To do this, the system inflates the air chambers in the side bolsters of the backrest within a fraction of a second when an imminent side impact is detected. This impulse not only moves the occupant away from the danger zone, increasing the distance from the door, as the impulse is also moderately transferred to the occupant. It mitigates the forces acting on him/her during a lateral impact. This can substantially lessen the load exerted on the ribcage by the side collision, and greatly reduce the risk of injury.

Mercedes-Benz has now added a new function of PRE-SAFE® Impulse Side to its measures in the pre-accident phase: when a side impact threatens, the vehicle body can be raised by the E-ACTIVE BODY CONTROL suspension (optional) within a few tenths of a second. Radar sensors are used to recognise a potential side crash. The actuator is the
E-ACTIVE BODY CONTROL suspension, which can raise the body upwards by up to 80 millimetres. This reduces the loads on the door structures, as the door sill can absorb more of the energy thanks to its higher position. As a result, deformation of the passenger cell and the loads acting on the occupants can be reduced.

During a severe side impact, the new centre airbag positions itself between the driver and front passenger seat, reducing the risk of their heads making contact It is integrated into the driver's seatback in the middle of the vehicle.

The centre airbag is triggered when a severe side collision is recognised and certain conditions are met. The main factors for deployment are the direction of impact, impact side, and front passenger seat occupancy.

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