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Emergency Tensioning Retractor (ETR)
The seat belts for the front seats are equipped with emergency tensioning retractors.
These tensioning retractors are located in each belt's inertia reel and become operationally ready
with the electronic key in steering lock position 1 or 2. The emergency tensioning retractors are
designed to activate only when the seat belts are fastened during frontal impacts exceeding the first
threshold of the SRS and in rear impacts exceeding a preset security level. They remove slack from
the belts in such a way that the seat belts fit more snugly against the body restricting its forward
movement as much as possible. In cases of other frontal impacts, angled impacts, roll-overs, certain
side impacts, or other accidents without sufficient frontal or rear impact forces, the emergency
tensioning retractors will not be activated. The driver and passengers will then be protected by the
fastened seat belts and inertia reel in the usual manner. For seat belt and emergency tensioning
retractor safety guidelines see Safety Guidelines in Index.