Разработчик: Audi

Так называется система тросов, которой связаны силовой агрегат, рулевая колонка и натяжители ремней безопасности. При сильном ударе, когда двигатель "уходит" с креплений назад, он натягивает тросы, которые перемещают через механическую тягу в доли секунды сдвигает рулевую колонку вперед от водителя и обеспечивают дополнительное натяжение ремней безопасности.

The 100/200 models from '88 feature a seat belt tensioning system. The system is entirely mechanical, using the mass (inertia) of a displaced engine/transmission to tension both front seat belts to hold the front passengers firmly in place. The system operates independently of the front driver's side airbag. The Pro-con 10 system consists of two Teflon coated stainless steel bowden cables that are wound around the seat belt retractors in opposite direction of the normal rotation. The cables run through the body, and are looped around a cable guide incorporated into the top of the transmission. The cables are then anchored to securing brackets on opposite sides in the engine compartment.

The system only operates in the event of a front end collision at impact speeds above approximately 15 miles per hour. At lower vehicle speeds, impact energy is absorbed through deformation of the car body alone. The system works on the principle of a block and tackle. The cable path to the seat belt retractors is twice as long as the relative movement between the engine and vehicle body. In the event of a frontal collision, the reeling in of the front seat belts occurs at twice the speed of the vehicle's front end deformation.

If a front end collision occurs, and the engine moves rearward, the cables are tensioned at the transmission. The cables, which are connected to the seat belt retractors, tighten the seat belts by turning the retractors backwards. After an accident in which the system has been activated, the belts will no longer be able to be reeled in by the automatic retractors. When this occurs, or if the seatbelts need replacement for any other reason, the seat belts, retractors, and cables must be replaced as a unit.

The seat belt system also incorporates a knee bar beneath the steering wheel (the glove box on the passenger side) to prevent submarining (sliding beneath your seatbelt) during a frontal impact. Seatbelt height is adjustable for front passengers on the B-pillar on each side, to provide better support in an accident.

The front seats have a ramped (upwardly sloped) lower seat cushion and generous bolsters on both the sport seats and optional comfort seats, to help hold front seat passengers in place during an impact. Rear outer seats include 3-point seatbelts, while the center seat has a lap belt. Mounting points are also provided for a top tether for a child seat on the rear seat.