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System of additional safety (SRS)

The number of devices and components that form the system of additional safety (SRS) comprises:

1. Two front (front) airbag. Driver airbag module is placed in the hub of the steering wheel. Passenger airbag placed into a special cavity in the right side of the instrument panel of a vehicle. The locations of the two pads are marked with warning labels ?�SRS AIRBAG?�;
2. Four side airbags front and rear seats. The modules are mounted side airbags in the corresponding car door;
3. Head airbags (curtain) safety, placed along the side edges of the roof panel, and provides additional protection to the driver and all passengers in side impact and rollover;
4. Direction sensor overload, triggered when a severe frontal / side impact;
5. Electronic self-diagnostic system, which is when the ignition sensor provides continuous testing overload Control Unit, gas generators and airbag wiring connecting the respective circuits;
6. Automatic emergency tightener mounted in the return device front seat belt;
7. The indicator lamp failure SRS, built in in the instrument panel;
8. Emergency autonomous power supply, designed to duplicate the main system power supply in the event of its failure during a collision.

The dashboard of the car mounted a special warning lamp SRS (see. Section A combination of devices, gauges and warning lights and indicator lights), designed to warn the driver identified self-diagnostic system failure in the system additional security. Depending on the vehicle operation control lamp indicates the possible fault modules front / side airbags or emergency tensioning devices, automatic seat belts.

The principle of operation of the front airbags

In no case do not carry young children in the front seat passenger airbag equipped car! This applies also to the installation on the front seat of a special child seat.

For weak collisions and roll-over front air bags do not have to operate.

Modules are front airbags mounted in the hub of the steering wheel and in the right panel of the dashboard, directly above the main glove compartment.

The module driver's front airbag (1) is mounted in the hub of the steering wheel (in the style cover relevant marking)

The module of the passenger's front airbag (2) is mounted in the right side of the instrument panel (in the style cover applied appropriate marking)

Sensors designed to respond to accelerations exceeding a certain limit, which may occur during a severe frontal collision. At a signal from the sensor control unit includes the airbag gas generators, causing their instant content.

During the collision the seat belt holds the offset from the lower torso sitting. Front airbags help prevent injury to the driver and front passenger as a result of the impact of the head and chest against the steering wheel / dashboard.

Airbags are activated at the moment of the collision; immediately after the operation of the airbag gas is vented, allowing the driver to maintain an adequate overview

Since both signals to actuate the airbags come from the same sensor, both airbags are activated simultaneously. However, there is a possibility of initiation only one of the cushions. This becomes possible when the magnitude of the problems in the collision directed overloads on the verge of the range of sensitivity of the sensors. In this case, the belts provide sufficient protection for the driver and front seat passenger, while the effect of the airbag deployment is minimized.

Immediately after the operation and performance of its functions, the gas cushions are produced, allowing the driver to maintain visibility and freely manipulate all vehicle controls.

The total duration of the process from the moment the sensor signal overloads before the release of the gas from the airbag takes a fraction of a second. Operation of pillows is so fast that the human ear can not perceive a cotton pillow when filling gas generators.

After a car accident in which the airbag deployment has occurred, the volume of the car interior looks a little smoky. This is actually a suspension of a fine powder, which is usually poured by shell cushions folded. People with respiratory disease may experience some discomfort from airborne gaseous products allocated gas generators of pillows.

The principle of operation of the side and head airbags

Modules side airbags mounted in the side door panel of the car. The locations of the two side airbags are usually marked with inscriptions ?�SIDE AIRBAG?�.

Modules are front side airbags (3) mounted in the front door panel of the car directly above the armrests

Modules rear side airbags (4) mounted in the rear door panel of the car directly above the armrests

FINANCE head airbag located on the side edges of the roof panel.

FINANCE head airbag located on the side edges of the roof panel

If a strong side impact sensors directed overloads arising load is exceeded a certain threshold value and output data signal to the control unit, which generates a command corresponding to the operation of the gas generator side airbag. Thus, if the blow fell from the passenger seat, the corresponding side air work even in the absence of the passenger seat.

Driving Side Airbag (immediately after an airbag deflates)

To ensure the greatest effectiveness of the protection afforded by the airbag, driver and passenger sitting in the front seat should sit up straight and wear seat belts.

The functioning of a control lamp of refusals SRS

When you turn on the ignition (ignition key in position 2) indicator lamp lights up briefly, then immediately goes out, confirming serviceability of functioning of all system components.

For an arbitrary control lamp is activated at any other time the owner of the car should be at the earliest opportunity to seek professional help service station company Mercedes-Benz. These situations include the following:

1. The warning lamp does not turn on when you turn the ignition key to position 2;
2. The warning lamp stays on after the engine is started;
3. The warning lamp is activated and stays in constant or flashing mode while driving.

In the presence of the above signs of malfunction additional security may fail in an emergency vehicle.

Neglect of signals SRS warning lamp can lead to very serious consequences in case of failure of airbags during a car accident!

Seat belts with automatic tensioners alert

Emergency automatic tensioners fitted reengaging trehankernyh front seat belt and lateral rear seats of the second row. Tensioners are activated at strong front overloads resulting in a frontal collision, and provide instantaneous sample slack belt, causing the tape tightly covers the body of the last sitting, greatly enhanced degree of protection for the driver and front passenger.

The tensioner (A) is built into the return mechanism assembly belt. The procedure for the use of such belts is similar to the order of use of conventional belts, equipped with inertial returnable devices. Tensioner triggering mechanism is completely transparent to the user and does not require any additional latest skills and knowledge.

Seat belt tensioner with automatic emergency A - Tensioner

Tensioners Activation occurs only when a significant front overloads. Triggering module is accompanied by a loud bang and a little smoke generation.

Eye-catching tensioners when triggered smoke is safe for human health, but with the direct inhalation can cause irritation of the mucous membranes.

It should be noted that the refusals pretensioner deploy in frontal crashes in most cases are not explained by malfunction of the system, and that arising from the impact of overload do not reach the threshold value at which the license modules.

As in the case of airbag modules of emergency tensioners are designed to fire only once and must be replaced after such assembly belts, - refer to the company's branded service station Mercedes-Benz. There are accepted all complaint about the failure of components SRS.

Maintenance items SRS

Airbags and an automatic emergency tensioning seat belts almost do not need regular inspection and maintenance. However, the owner of a suitably equipped vehicle should bear in mind the following points:

1. After the deployment of the airbags, they must be replaced with the unit control system. Do not attempt to dismantle the exhaust cushion yourself. These operations should only be performed in the workshop Car;
2. If the operation of the SRS warning lamp indicates a failure in the system, should, without delay, contact the nearest service station company's Mercedes-Benz, which will be made a full diagnosis and necessary regenerative repair of the system. Otherwise the airbag may not work when a traffic accident, and not to fulfill their protective function;
3. To work with nodes more security is permitted only by trained personnel. It is forbidden to dismantle a car airbags and emergency tightener. In case of failure SRS or after the emergency deployment of the airbags and belt tensioners need to consult a workshop of the company Mercedes-Benz for the repair or replacement of system components;
4. Do not open the units and do not change the wiring airbag systems and devices Automatic emergency tensioning seat belts - such interference can lead to involuntary triggering airbags and pretensioners and cause injury artist or bystanders;
5. Do not replace the front seats, without prior consultation at a workshop of the company Mercedes-Benz. Inaccurate or incorrect execution of replacement or removal of covers can lead to failure of operation of the side airbag in the event of a traffic accident.

When transferring a vehicle to another person should be mandatory to inform the latter of all installed elements of SRS with corresponding points of the instructions on the rules of use of the vehicle.

All models equipped with SRS at the locations of the active elements of the system established by special warning signs.