2011 Mercedes R-Class Owner's Manual - Page 38

36 Occupant safety Vehicle equipment i This manual describes all the standard and optional equipment of your vehicle which was available at the time of purchase. Country-specific differences are possible. Bear in mind that your vehicle may not feature all functions described here. This also refers to safety-related systems and functions. Occupant safety Overview of occupant safety In this section you will learn the most important facts about the restraint system components of the vehicle. The restraint systems are: RSeat Safety Air bags or Emergency Tensioning Devices (ETDs), for example, could deploy inadvertently or fail to deploy in accidents although the deceleration threshold for air bag deployment is exceeded. Therefore, never modify the restraint systems. Do not tamper with electronic components or their software. i More information on the subject of children in the vehicle and child restraint systems can be found under the "Children in the vehicle" chapter (Y page 59). SRS (Supplemental Restraint System) Introduction SRS reduces the risk of occupants coming into contact with the vehicle's interior in the event of an accident. It can also reduce the effect of the forces to which occupants are subjected during an accident. SRS consists of: SRS warning lamp bags Rair bag control unit (with crash sensors) RETDs Rbelt force limiters R+ Rair belts restraint systems R"LATCH" type child seat mountings Additional protection is provided by: RChild RSRS (Supplemental Restraint System) head restraints RPRE-SAFE® RAir bag system components with: - PASSENGER air bag OFF indicator lamp - USA only: front-passenger seat with Occupant Classification System (OCS) - Canada only: front-passenger seat with BabySmart™ air bag deactivation system The protective functions of the systems work in conjunction with each other. The systems are, however, autonomous. RNECK-PRO SRS warning lamps SRS functions are checked regularly when you switch on the ignition and when the engine is running. Therefore, malfunctions can be detected in good time. The + SRS warning lamp in the instrument cluster lights up when the ignition is switched on. It goes out no later than a few seconds after the engine is started. The SRS components are in operational readiness when the + indicator lamp goes out while the engine is running. G Warning Modifications to or work improperly conducted on restraint system components or their wiring, as well as tampering with interconnected electronic systems, can lead to the restraint systems no longer functioning as intended.