Mercedes GLA W212 X156 owners manual page 59

text version of content this owner's manual page from owners manual to the vehicle Mercedes GLA, year of production 2013:

Occupantsafety 57 If the restraint system control unit detects anor do they provide an indication of air bag moresevereaccident,furthercomponentsofdeployment. the restraint system are activated independ- The vehicle can be deformed considerably, ently of each other in certain frontal collision without an air bag being deployed. This is the situations: case if only parts which are relatively easily deformed are affected and the rate of decel- RFrontairbagsaswellasdriver'sandfront- eration is not high. Conversely, air bags may passenger knee bags be deployed even though the vehicle suffers RWindowcurtainairbag,ifthesystemdeter- Safety onlyminordeformation.Thisisthecaseif,for minesthatdeploymentcanofferadditional example, very rigid vehicle parts such as lon- protection to that provided by the seat belt gitudinalbodymembersarehit,andsufficient Thefront-passenger front air bag is activated deceleration occurs as a result. or deactivated depending on the person on If the restraint system control unit detects a the front-passenger seat. The front- side impact or that the vehicle is rolling over, passenger front air bag can only deploy in an therelevantrestraintsystemcomponentsare accident if the PASSENGERAIRBAGONindi- activated independently of one another cator lamp is lit. Observe the information on depending on the apparent type of accident. the PASSENGERAIRBAGindicator lamps If thesystemdeterminesaneedforadditional (Y page 43). protection for the vehicle occupants, the Your vehicle has two-stage front air bags. EmergencyTensioningDevicesaredeployed. During the first deployment stage, the front RSideimpactairbagsonthesideofimpact, air bag is filled with propellant gas to reduce independently of the Emergency Tension- the risk of injuries. The front air bag is fully ing Device and the use of the seat belt on deployed with the maximum amount of pro- thedriver'sseatandouterseatsinthesec- pellant gas if a second deployment threshold ondrow is reached within a few milliseconds. The side impact air bag on the front- The deployment threshold of the Emergency passenger side (front) deploys in the fol- TensioningDevicesandtheairbagaredeter- lowing situations: minedbyevaluatingtherateofvehicledecel- eration or acceleration which occurs at vari--the OCS system detects that the front- ouspoints in the vehicle. This process is pre-passenger seat is occupied or emptive in nature. Deployment should take -the belt tongue is engaged in the belt placeingoodtimeatthestartofthecollision. buckle of the front-passenger seat The rate of vehicle deceleration or accelera- RWindowcurtainair bag on the side of tion and the direction of the force are essen- impact, independently of the use of the tially determined by: seatbeltandindependentlyofwhetherthe front-passenger seat is occupied Rthedistribution of forces during the colli- sion RWindowcurtainairbagsonthedriver'sand front-passenger side in certain situations Rthecollision angle whenthevehicle rolls over, if the system Rthedeformationcharacteristicsofthevehi- determinesthatdeploymentcanofferaddi- cle tional protection to that provided by the Rthecharacteristicsoftheobjectwithwhich seat belt the vehicle has collided iNotallairbagsaredeployedinanacci- Factorswhichcanonlybeseenandmeasured dent. The different air bag systems work after a collision has occurred do not play a independently of each other. decisive role in the deployment of an air bag, Z

owners manual Mercedes GLA

owners manual Mercedes GLA - year of production: 2013 - Mercedes GLA W212 X156 owners manual EN