2009 Mercedes SLR McLaren Owner's Manual - Page 75

Safety and Security Occupant safety and if the vehicle speed once exceeds 15 mph (25 km/h), the seat belt telltale < starts flashing and a warning chime sounds with increasing intensity for a maximum of 60 seconds or until the driver's and passenger's seat belts are fastened. If the driver's or the passenger's seat belt remain unfastened after 60 seconds, the warning chime stops sounding. The seat belt telltale < stops flashing but continues to be illuminated. The seat belt telltale < will only go out if both the driver's and the passenger's seat belt (with the passenger seat occupied) are fastened, or the vehicle is standing still and a door is opened. For more information, see the "Practical hints" section ( page 312). Emergency Tensioning Device (ETD), seat belt force limiter The seat belts are equipped with emergency tensioning devices and seat 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 side collisions exceeding the deployment threshold on the far side of the impact if the restraint systems are operational and functioning correctly, see 1 indicator lamp ( page 60) in certain vehicle rollovers if the system determines an additional degree of protection The ETDs will only activate if the seat belts are fastened (latch plate properly inserted into buckle). In an impact, ETDs remove slack from the seat belts in such a way that the seat belts fit more snugly against the body. Seat belt force limiters reduce the force exerted by the seat belts on occupants during a crash. Warning! G An ETD that was activated must be replaced. When disposing of the ETD, our safety instructions must be followed. These are available at any authorized Mercedes-Benz Center. 75