Overview of occupant safety

In this section, you will learn the most important facts about the restraint system components of the vehicle.

The restraint system consists of:

seat belts
child restraint systems
LATCH-type (ISOFIX) child seat anchors Additional protection is provided by:

SRS (Supplemental Restraint System)
NECK-PRO head restraints/NECK-PRO luxury head restraints
PRE-SAFE®
Air 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 different air bag systems work independently of each other. The protective functions of the system work in conjunction with each other. Not all air bags are deployed in an accident.

WARNING Modifications to or work improperly 
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.
Air bags or Emergency Tensioning Devices/belt buckle tensioners, for example, could deploy inadvertently or fail to deploy.
Therefore, never modify the restraint systems. Do not tamper with electronic components or their software.

infants and children traveling with you in See "Children in the vehicle" for more information on infants and children traveling with you in the vehicle and restraints for infants and children.

    See also:

    General notes
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    4MATIC (permanent four-wheel drive)
    4MATIC ensures that all four wheels are permanently driven. Together with ESP®, it improves the traction of your vehicle whenever a drive wheel spins due to insufficient grip. WARNING If a ...

    Activating/deactivating
    •► To activate: press the button. The indicator lamp above the button lights up. •► To switch off: press the button. The indicator lamp above the button goes out. The co ...