Seat belts19
Safety FirstOperating instructionsPractical tipsTe c h n i c a l D a t a It is easy to explain how the laws of physics work in the case of a head-on
collision: when a vehicle starts moving Ÿpage 18, fig. 5, this is a certain
amount of energy known as “kinetic energy” both in the vehicle and in the
occupants.
The higher the speed and the greater the weight of the vehicle, the more
energy there is to be absorbed in an accident.
The most significant factor, however, is the speed of the vehicle. If the speed
doubles from 25 km/h to 50 km/h, for example, the kinetic energy is multi-
plied by four.
The amount of “kinetic energy” depends on the speed of the vehicle and the
weight of the vehicle and its passengers. The higher the speed and the
greater the weight of the vehicle and the occupants, the more energy there is
to be absorbed in an accident.
Passengers not wearing seat belts are not “attached” to the vehicle. As a
result, in a frontal collision they will continue to move forward at the speed
their vehicle was travelling just before the impact until something stops
them! Because the passengers in our example are not restrained by seat
belts, all of the passengers' kinetic energy has to be absorbed at the point of
impact Ÿpage 18, fig. 6.
At speeds of 30 km/h to 50 km/h, the forces acting on bodies in a collision
can easily exceed one tonne (1000 kg). At greater speed these forces are even
higher.
This example applies not only to frontal accidents, but to all accidents and
collisions.
Dangers of not using the seat belt
Many people believe that the occupants can protect themselves with their
hands in a minor collision. This is false!
Fig. 7 A driver not
wearing a seat belt is
thrown forward violently.
Fig. 8 The unbelted rear
passenger is thrown
forward violently, hitting
the driver wearing a seat
belt.
Seat belts 20
Even at low speeds, the forces acting on the body in a collision are so great
that it is not possible to brace oneself with just one's arms and hands. In a
frontal collision, unbelted passengers are thrown forward and will make
violent contact with the steering wheel, dash panel, windscreen or whatever
else is in the way Ÿpage 19, fig. 7.
The airbag system is not a substitute for seat belts. When triggered, airbags
provide only additional protection. Airbags do not deploy in all types of acci-
dent. All occupants (including the driver) must be wearing seat belts properly
during the trip, even if the vehicle is equipped with airbag systems. This will
reduce the risk of critical or fatal injuries in the event of an accident – regard-
less of whether an airbag is fitted for the seat.
The airbag is only deployed once. To achieve the best possible protection, the
seat belt must always be worn properly so that you will be protected in acci-
dents in which no airbag is deployed. Vehicle occupants not wearing belts
could be thrown from the vehicle and sustain even more severe or fatal inju-
ries.
It is also important for the rear passengers to wear seat belts properly, as they
could otherwise be thrown forward violently in an accident. Rear passengers
who do not use seat belts endanger not only themselves but also the driver
and other occupants Ÿpage 19, fig. 8.Seat belt protection
Wearing a correctly fastened seat belt can significantly change the situation.
Properly worn seat belts hold the vehicle occupants in the correct sitting posi-
tions and substantially reduce the kinetic energy in the event of an accident.
Seat belts also help to prevent uncontrolled movements that could lead to
severe injuries. In addition, properly worn seat belts reduce the danger of
being thrown from the car Ÿfig. 9.
Passengers wearing their seat belts correctly benefit greatly from the ability
of the belts to absorb kinetic energy. The front crumple zones and other
passive safety features (such as the airbag system) are also designed to
absorb the kinetic energy generated in a collision. Taken together, all these
features reduce the energy released and decrease the risk of injury.
Our examples describe frontal collisions. Of course, properly worn seat belts
substantially reduce the risk of injury in all other types of accidents. This is
why it is so important to fasten seat belts before every trip, even when just
driving “around the corner”. Ensure that your passengers wear their seat
belts as well.
Fig. 9 Drivers with prop-
erly worn seat belts will
not be thrown forward in
the event of sudden
braking.
Airbag system33
Safety FirstOperating instructionsPractical tipsTe c h n i c a l D a t a
Airbag system
Description and function of the airbag
The airbag can protect vehicle occupants in the event of an accidents, cush-
ioning the movement of the occupants in the direction of the collision in
frontal and side accidents.
Deployed airbags fill with a propellant gas. This causes the airbag covers to
break and the airbags to deploy extremely quickly in their entire deployment
space within fractions of a second. When an occupant with the seat belt prop-
erly fastened puts pressure on the inflated airbag, the propellant gas escapes
to absorb the force of the impact and slow the movement. This reduces the
risk of severe or fatal injuries. Airbag deployment does not mean that other
types of injury such as swelling, bruising, burns and skin injuries can be ruled
out.
Airbags do not protect the arms or the lower part of the body.
The most important factors for triggering the airbag are the type of accident,
the angle of impact, the vehicle speed and the characteristics of the object
the vehicle hits. Therefore, airbags are not triggered every time the vehicle is
visibly damaged.
The airbag system is designed to be triggered in collisions with a severe
impact. The front, curtain, side and knee airbags may be triggered under
special circumstances. The scope of any visible damage to the vehicle is not
an indication of airbag deployment.
Airbags act in conjunction with three-point seat belts in the event of certain
accidents, when the vehicle deceleration rate is severe enough to trigger the
airbags. Airbags only deploy once and only under certain circumstances. Seat
belts remain present to offer protection in situations where airbags are not
triggered or where they have already deployed. For example, when a vehicle
hits another after an initial collision or is hit by another vehicle.The airbag system is an integral part of the car's passive safety system. The
airbag system can only work effectively when the occupants are wearing their
seat belts correctly and have adjusted the head restraints properly
’
Ÿpage 10.
Vehicle safety components
The following safety equipment makes up the vehicle safety design to reduce
the risk of severe and fatal injuries. Depending on the vehicle equipment,
some equipment may not be fitted in the vehicle or may not be available in
some markets.
xOptimised seat belts for all seats.
xBelt tension devices for the driver and front passenger and, where appli-
cable, on the outer seats of the second row of seats in combination with the
side airbags.
xFurthermore, belt tension limiters for the driver's and front passenger's
seat belt.
xBelt height adjustment for the front seats and, where applicable, the
outer seats of the second row of seats.
xSeat belt warning lamp
xFrontal airbags for driver and passenger.
xSide airbags for the driver, front passenger and, where applicable, the
outer seats of the second row of seats.
xLeft and right curtain airbags.
xOne airbag for the driver's knees.
xAirbag control lamp T.
xPASSENGER AIR BAG / &