2011 Mercedes GL-Class Owner's Manual - Page 60

58 Occupant safety ETDs/belt buckle tensioners do not correct incorrect seat positions or incorrectly fastened seat belts. ETDs do not pull vehicle occupants back towards the backrest. Seat belt force limiters, when activated, are employed to help reduce the force exerted by the seat belts on occupants during a crash. The front belt force limiters are synchronized with the front air bags, which take on a part of the deceleration force. Thus, the force exerted on the occupant is distributed over a greater area. The ETDs/belt buckle tensioners can only be activated when: Rthe Rthe in rare cases will the bang affect your hearing. The powder that is released generally does not constitute a health hazard. The + SRS warning lamp lights up. i If the belt buckle tensioners have been triggered on the front seats, the buckle will be pulled down and will be almost flush with the upper edge of the seat. The + SRS warning lamp is lit. G Warning The belt buckle tensioners on the front seats only function if the belt buckles can be pulled down unobstructed. They must not be restricted in any way. Therefore, do not grab the belt buckles and do not place any objects under the belt buckles. Otherwise, the tensioning of the belt by the buckle is restricted or will not function, and will not provide any additional protection. Safety ignition is switched on restraint systems are operational; see "SRS warning lamp" (Y page 36) Rthe belt tongue is engaged in the buckle on each of the three-point seat belts in the front Rthe front-passenger seat is occupied and the belt tongue is engaged in the buckle on the front-passenger side. The ETDs on the outside seats in the second row and on the seats in the third row are triggered independently of the lock status of the seat belts. The ETDs are triggered depending on the type and severity of an accident: Rin the event of a head-on or rear-end collision if the vehicle decelerates or accelerates rapidly in a longitudinal direction during the initial stages of the impact Rin the event of a side impact, on the side opposite the impact if the vehicle decelerates or accelerates rapidly in a lateral direction Rin certain situations if the vehicle overturns and the system determines that it can provide additional protection. If the ETDs/belt buckle tensioners are triggered, you will hear a bang and a small amount of powder may also be released. Only G Warning Pyrotechnical ETDs/belt buckle tensioners that were activated must be replaced. For your safety, when disposing of the pyrotechnic ETDs/belt buckle tensioners always follow our safety instructions. These instructions are available from any authorized Mercedes-Benz Center. The PRE-SAFE® system is equipped with electrically reversible pre-tensioners that do not need replacing after deployment.