2007 Mercedes S-Class Owner's Manual - Page 59

Safety and Security Occupant safety When using a seat belt to secure infant or toddler restraints or children in booster seats, always follow the child seat manufacturer's instructions. i The ETDs for the front seats will only activate if the front seat belt is fastened (latch plate properly inserted into buckle). The ETDs for the rear outer seats will activate with or without the respective seat belt fastened. Warning! G A pyrotechnic emergency tensioning device (ETD) that was activated must be replaced. When disposing of the pyrotechnic emergency tensioning device, our safety instructions must be followed. These are available at your authorized Mercedes-Benz Center. PRE-SAFE® has electrically operated reversible pre-tensioners that do not require replacement after activation. Emergency tensioning device (ETD), seat belt force limiter The seat belts for the front and rear outer seats are equipped with emergency tensioning devices and belt force limiters. The ETD is designed to activate in the following cases: in frontal or rear-end impacts exceeding the system deployment threshold in certain vehicle rollovers if the restraint systems are operational and functioning correctly, see = indicator lamp ( page 552) In an impact, emergency tensioning devices remove slack from the belts in such a way that the seat belts fit more snugly against the body. Belt force limiters, when activated, are employed to help reduce the peak force exerted by the seat belts on occupants during a crash. 58