Mercedes M-Class W163
since 1997 release
Repair and operation of the car
+ Mercedes-Benz cars of a class M (W163)
- Governing bodies and methods of safe operation
First 1500 km
+ Access, protection
- Elements of security systems
Instructions for use means of passive safety of the driver and passengers
Adjustment of seats
Adjustment of provision of a steering wheel
System of additional safety (SRS)
Danger of poisoning with monoxide of carbon (SO)
+ Car equipment, arrangement of devices and governing bodies
+ Methods of operation and auxiliary systems
+ Current leaving and service
+ Cooling systems, heating and air conditioner
+ A power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Transmission line
+ Brake and auxiliary systems
+ Suspension bracket and steering
+ Onboard electric equipment
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System of additional safety (SRS)
Enter number of the devices and components forming system of additional safety (SRS):
In an instrument guard of the car the special control lamp of SRS (see the Section Combination of Devices, measuring instruments and control lamps and light indicators) intended for the warning of the driver of the refusals revealed by system of self-diagnostics in system of additional safety is built in. Depending on a car complete set operation of a control lamp testifies to possible malfunctions of modules of frontal/side safety cushions or devices of an automatic emergency tension of seat belts.
Principle of functioning of frontal safety cushions
Modules of frontal safety cushions are built in in a stupichny part of a steering wheel and in the panel the right part of the dashboard, directly over the main ware box.
Sensors of the directed overloads react to excess of some extreme value which can arise at strong head-on collision. On a signal of sensors the control unit includes gas generators of safety cushions, causing their instant filling.
As signals on operation of both safety cushions arrive from the same sensors, both pillows work at the same time. However the probability of initiation of only one of pillows is not excluded. It becomes possible when the size of the directed overloads which arose at collision was on the verge of the range of sensitivity of sensors. In this case seat belts provide rather reliable protection of the driver and forward passenger while the effect of operation of a safety cushion is minimum.
The full duration of process takes with sensors of overloads before production of gas from pillows fractions of a second the moment of giving of a signal. Operation of pillows happens so quickly that the human ear simply is not capable to apprehend cotton of gas generators when filling pillows.
Principle of functioning of side and head safety cushions
Modules of side safety cushions are built in in the panel of side doors of the car. The locations of both side pillows are usually marked with the inscriptions "SIDE AIRBAG".
Gas generators of head pillows are located on side edges of the ceiling panel.
At strong side blow sensors of the directed overloads fix excess by the arising loadings of some threshold value and give information signal on the control unit which develops the command for operations of a gas generator of the corresponding side safety cushion. At the same time, if the blow was come from the outside a passenger seat, the corresponding side pillow will work even at absence on the passenger's seat.
For ensuring the greatest efficiency of protection which is provided by safety cushions the driver and the passenger sitting on a front seat have to sit directly and to be fastened by seat belts.
Order of functioning of a control lamp of refusals of SRS
At inclusion of ignition (the ignition key is turned in situation 2) the control lamp lights up for a short time, then at once dies away that confirms about serviceability of functioning of all knots of system.
In the presence of the listed above malfunction signs the additional security system can refuse at failure of the car.
Seat belts with automatic emergency natyazhitel
Emergency automatic natyazhitel equipped returnable devices of three-anchor seat belts of front seats and side places of a back seat of the second row. Are put by Natyazhiteli in action at the strong frontal overloads arising at head-on collision and provide instant selection of a weak point of belts therefore tapes of the last densely cover a body sitting, in considerably degree increasing degree of protection of the driver and forward passenger.
Activation of natyazhitel happens only at considerable frontal overloads. Operation of modules is followed by loud cotton and small smoking.
It is necessary to notice that refusals of operation of natyazhitel at head-on collision in most cases are explained not by malfunction of system, and the fact that the overloads arising at blow do not reach threshold value at which activation of modules is made.
Maintenance of the SRS elements
Safety cushions and devices of an automatic emergency tension of seat belts, practically do not need regular checks and maintenance. However the owner of the vehicle equipped as appropriate has to mean the next moments:
By transfer of the car to other person it is necessary to inform without fail the last on all established SRS elements with the indication of the corresponding points of the instruction on rules of use of the car.