2005 Mercedes SLK-Class Owner's Manual - Page 72

Safety and Security Occupant safety Emergency tensioning device (ETD), seat belt force limiter The seat belts are equipped with emergency tensioning devices (ETDs) and seat belt force limiters. The ETD is designed to activate in the following cases: in frontal or rear-end impacts exceeding a preset severity level. if the restraint systems are operational and functioning correctly, see "1 indicator lamp" ( page 62). 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 reduce the force exerted by the seat belts on occupants during a crash. Warning! ! Do not place objects heavier than 20 lbs (9 kg) on the passenger seat. This could cause the front air bag or head-thorax air bag on the passenger side and, with the seat belt fastened to secure the object, the ETD to deploy in a crash which exceeds the system's deployment threshold. G An emergency tensioning device (ETD) that was activated must be replaced. When scrapping the emergency tensioning device, our safety instructions must be followed. These are available at your authorized Mercedes-Benz Center. i The ETDs for the seats will only activate if the respective seat belt is fastened (latch plate properly inserted into buckle). 72