2009 Seat Leon 5D airbag

Seat belts21
Safety First
Controls and equipment
Practical tips
Technical Data
travelling just before the impact. This example applies not only to frontal acci-
dents, but to all accidents and collisions.
The danger of not using the seat belt
The general belief that the passengers can protect them-
selves with their hands in a minor collision is false.
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 one's hands. In a frontal collision,
unbelted passengers are thrown forward and will make violent contact with
the steering wheel, dashboard, windscreen or whatever else is in the way
⇒
fig. 8 .
The airbag system is not a substitute for the seat belts. When triggered,
airbags provide only additional protection. All passengers (including the
driver) must wear seat belts properly during the trip. This will reduce the risk
of severe injuries in the event of an accident – regardless of whether an
airbag is fitted for the seat or not.
Note that airbags can be triggered only once. To achieve the best possible
protection, the seat belt must always be worn properly so that you will be
protected in accidents in which no airbag is deployed.
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 front
occupants ⇒fig. 9 .
Fig. 8 A driver not
wearing a seat belt is
thrown forward violently.
Fig. 9 The unbelted rear
passenger is thrown
forward violently, hitting
the driver wearing a seat
belt.
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Seat belts
22Seat belts protection
Passengers not wearing seat belts risk severe injuries in the
event of an accident.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.
Passengers wearing their seat belts correctly benefit greatly from the ability
of the belts to absorb kinetic energy. The front part of your vehicle and other
passive safety features (such as the airbag system) are also designed to
absorb the kinetic energy released in a collision. Taken together, all these
features reduce the releasing kinetic energy and consequently, 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. Accident statistics
have shown properly that wearing seat belts is an effective mean of substan-
tially reducing the risk of injury and improving the chances of survival in a
serious accident. Furthermore, properly worn seat belts improve the protec-
tion provided by airbags in the event of an accident. For this reason, wearing
a seat belt is required by law in most countries.
Although your vehicle is equipped with airbags, the seat belts must be
fastened and worn. The front airbags, for example, are only triggered in some
frontal accidents. The front airbags will not be triggered during minor frontal
collisions, minor side collisions, rear collisions, rolls or accidents in which the
airbag trigger threshold value in the control unit is not exceeded.
Therefore, you should always wear your seat belt and ensure that your
passengers have fastened their seat belts properly before you drive off!
Safety instructions
on using seat belts
If seat belts are used correctly, they can reduce the risk of
injury in an accident.– Always wear the seat belt as described in this booklet.
– Ensure that the seat belts can be fastened at all times and are not damaged.
WARNING
•If the seat belts are worn incorrectly or not at all, the risk of severe inju-
ries increases. The optimal protection from seat belts can be achieved only
if you use them properly.
Fig. 10 Driver wearing
the seat belt properly: is
secured by the belt in
sharp braking
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Seat belts27
Safety First
Controls and equipment
Practical tips
Technical Data
– Press the upper part of the shoulder belt guide and hold it in this
position ⇒page 26, fig. 16 .
– Move the shoulder belt guide up or down until you have adjusted the seat belt ⇒ page 24.
– After adjusting, pull the shoulder belt sharply to check that the catch on the shoulder belt guide is engaged securely.Incorrectly fastened seat belts
Incorrectly worn seat belts can cause severe injuries.Seat belts can provide optimal protection only if the belt web is
properly worn. The seat belts must be fastened exactly in the order
described in this chapter. An incorrect sitting position impairs
substantially the protection a seat belt offers and can lead to severe
or fatal injuries. The risk of severe or fatal injuries is especially
increased when a deploying airbag strikes an occupant who has
assumed an incorrect sitting position. As driver, you are responsible
for all vehicle occupants, especially children. Therefore:
– Never permit anyone to assume an incorrect sitting position in the vehicle while travelling ⇒.
WARNING
•An incorrectly worn seat belt increases the risk of severe injuries.•Before every trip, instruct your passengers to adjust their seat belts
properly and to wear them during the trip.•Read and always observe information and warnings concerning the use
of seat belts ⇒page 22.
Belt tension devicesFunction of the belt tension device
During a frontal collision, the seat belts on the front seats are
retracted automatically.The seat belts for the front occupants are equipped with belt tension devices.
Sensors will only trigger the belt tension devices during severe head-on,
lateral and rear collisions, and only if the seat belt is actually being worn. This
retracts and tightens the seat belts, reducing the forward motion of the occu-
pants.
The belt tension device can be triggered only once.
The belt tension devices will not be triggered in the event of a light frontal,
side or rear collision, if the vehicle overturns or in situations where no large
forces act on the front, side or rear of the vehicle.
Note
•If the belt tension devices are triggered, a fine dust is produced. This is
normal and it is not an indication of fire in the vehicle.•The relevant safety requirements must be observed when the vehicle or
components of the system are scrapped. A qualified workshop is familiar with
these regulations and will be pleased to pass on the information to you.Service and disposal of belt tension devicesThe belt tension devices are components of the seat belts that are installed
in the seats of your vehicle. If you work on the belt tension devices or remove
and install parts of the system when performing other repair work, the seat
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Airbag system29
Safety First
Controls and equipment
Practical tips
Technical Data
Airbag systemBrief introductionWhy wear a seat belt and assume the correct sitting position?
For the inflating airbags to achieve the best protection, the
seat belt must always be worn properly and the correct sitting
position must be assumed.For your own safety and the safety of the passengers, please ensure
the following before driving:
– Always wear the seat belt properly ⇒page 19.
– Adjust the driver's seat and the steering wheel correctly ⇒page 10.
– Adjust the front passenger seat correctly ⇒page 11.
– Adjust the head restraint correctly ⇒page 13.
– Use the correct child restraint syst em to protect children in your
vehicle ⇒page 44.The airbag is deployed at high speed in fractions of a second. If you have an
incorrect seating position at the time the airbag is deployed, it could cause
you critical injuries. Therefore, it is essential that all passengers in the vehicle
assume a correct sitting position while travelling.
A sharp braking before an accident may cause a passenger not wearing a seat
belt to be thrown forward into the area of the deploying airbag. In this case, the inflating airbag may inflict critical or fatal injuries on the occupant. This
also applies to children.
Always maintain the greatest possible distance between yourself and the
front airbag. This way, the front airbags can completely deploy when trig-
gered, providing their maximum protection.
The most important factors that will trigger an airbag are: the type of acci-
dent, the angle of collision and the speed of the vehicle.
Whether the airbags are triggered depends primarily on the vehicle deceler-
ation rate resulting from the collision and detected by the control unit. If the
vehicle deceleration occurring during the collision and measured by the
control unit remains below the specified reference values, the front, side
and/or curtain airbag will not be triggered. Take into account that the visible
damage in a vehicle involved in an accident, for whatever reason, is not an
indication as to why the airbags had been triggered.
WARNING
•Wearing the seat belt incorrectly or assuming an incorrect sitting posi-
tion can lead to critical or fatal injuries.•All occupants, including children, who are not properly belted can
sustain critical or fatal injuries if the airbag is triggered. You should always
transport all children up to 12 years of age on the rear seat. Never transport
children in the vehicle if they are not restrained or the restraint system is
not appropriate for their age, size or weight.•If you are not wearing a seat belt, if you lean forward or to the side while
travelling or assume an incorrect sitting position, there is a substantially
increased risk of injury. This increased risk of injury will be further
increased if you are struck by an inflating airbag.•To reduce the risk of injury from an inflating airbag, always wear the
seat belt properly ⇒page 19.
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Airbag system
30•Always properly adjust the front seats.
The danger of fitting a child seat on the front passenger seat
Rear-facing child seats must never be used on the front
passenger seat when the front passenger airbag is enabled.An enabled front airbag on the front passenger side is potentially a major
danger to a child. The front passenger seat is life threatening to a child if
he/she is transported in a rear-facing child seat. You should always transport
all children up to 12 years of age on the rear seat.
If a rear-facing child seat is secured to the front passenger seat, an inflating
airbag can strike it with such great force that critical or fatal injuries may
result.
Therefore we strongly recommend you to transport children on the rear seats.
That is the safest place for children in the vehicle. Alternatively, the front
passenger airbag can be disabled with a key-operated switch ⇒page 42.
When transporting children, use a child seat appropriate to the age and size
of each child ⇒page 44.
For those vehicles that do not include a key lock switch to turn the airbag off,
an Authorised Service Centre must be consulted.
WARNING
•If a child seat is secured to the front passenger seat, the risk to the child
of sustaining critical or fatal injuries in the event of an accident increases.•Never secure a rear-facing child seat to the front passenger seat if the
front passenger airbag is enabled. The child can suffer critical or fatal inju-
ries when the front passenger airbag is triggered.
•An inflating front passenger airbag can strike the rear-facing child seat
and hurl it with great force against the door, the roof or the backrest.•For those vehicles that do not include a key lock switch to turn the
airbag off, an Authorised Service Centre must be consulted.•If, under special circumstances, it is necessary to transport a child in a
rear-facing child seat on the front passenger seat, it is absolutely essential
that you observe the following safety measures:
−Disable the front passenger airbag ⇒page 42, “Deactivating
airbags*”.
− The child seat must be approved by the child seat manufacturer for
use on a front passenger seat with front or side airbag.
− Follow the installation instructions given by the child seat manufac-
turer and observe the safety instructions ⇒page 44, “Child safety”.
− Before properly installing the child seat, push the front passenger
seat completely backwards so that the greatest possible distance to
the front passenger airbag is ensured.
− Ensure that no objects prevent the front passenger seat from being
pushed completely back.
− The backrest of the front passenger seat must be in an upright
position.
Warning lamp for airbag and belt tension device system

This warning lamp monitors the airbag and belt tension
device system.The warning lamp monitors all airbags and belt tension devices in the
vehicle, including control units and wiring connections.
WARNING (continued)
WARNING (continued)
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Airbag system31
Safety First
Controls and equipment
Practical tips
Technical Data
Monitoring of airbag and belt tension device system
Both the airbag and belt tension device systems operation is constantly
monitored electronically. Each time the ignition is switched on, the warning
lamp
 lights for several seconds and the display in the instrument panel*
shows AIRBAG / TENSIONER .
The system must be checked when the warning lamp
 :
•does not light up when the ignition is switched on,•after the ignition is switched on, it turns off after 4 seconds,•it turns off and then lights up again after the ignition is switched on,•lights up or flashes while the car is moving.
In the event of a malfunction, the warning lamp remains on continuously. In
addition, depending on the malfunction, a fault message appears in the
display of the combi-instrument for approx. 10 seconds and a short acoustic
sig nal is giv en . I n th is e ve nt, yo u s hould ha ve a q ua lif ie d wor ks hop che ck th e
system immediately.
If any of the airbags are de-activated by the Authorised Service Centre, the
indicator lights for several seconds more after the verification and will turn off
if there is no fault.WARNING
•If there is a malfunction, the airbag and belt tension device system
cannot properly perform its protective function.•If a malfunction occurred, have the system checked immediately by a
qualified workshop. Otherwise, in the event of an accident, the airbag
system and belt tension devices may not be triggered, or may not be trig-
gered correctly.
Repairs, maintenance and disposal of the airbagsThe parts of the airbag system are instal led in various places in your vehicle.
If you work on the airbag system or remove and fit parts of the system when
performing other repair work, parts of the airbag system may be damaged.
The consequence may be that, in the event of an accident, the airbag inflates
incorrectly or does not inflate at all.
The relevant safety requirements must be observed when the vehicle or
components of the airbag are scrapped. The specialist workshops and the
Vehicle disposal centres are familiar with these requirements.
WARNING
•If repairs are not carried out by a professional, or if the airbags are used
incorrect ly, th e ris k of se vere or fatal inj uries is increas ed. T he airbags may
fail to inflate, or could inflate in the wrong circumstances.•Do not cover or stick anything on the steering wheel hub or the soft
plastic surface of the airbag unit on the passenger side of the dashboard,
and do not obstruct or modify them in any way.•It is important not to attach any objects such as cup holders or tele-
phone mountings to the surfaces covering the airbag units.•To clean the steering wheel or dash panel, you may use only a dry or a
water-moistened cloth. Never clean the dash panel and the airbag module
surface with cleansers containing solvents. Solvents cause the surface to
become porous. If the airbag triggered, disintegrating plastic parts could
cause substantial injuries.•Never attempt to repair, adjust, remove or install parts of the airbag
system.•Any work on the airbag system or removal and installation of the airbag
components for other repairs (such as repairs to the steering wheel) should
be performed only by a qualified workshop. Qualified workshops have the
necessary tools, repair information and qualified personnel.
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Airbag system
32•We strongly recommend you to go to a qualified workshop for all work
on the airbag system.•Never attempt to alter the front bumper or the body.•The airbags provide protection for just one accident; replace them once
they have deployed.
Front airbagsDescription of front airbags
The airbag system is not a substitute for the seat belts.
The front airbag for the driver is located in the steering wheel ⇒fig. 17 and
the airbag for the front passenger is located in the instrument panel
⇒ fig. 18. Airbags are identified by the word “AIRBAG”.
In conjunction with the seat belts, the front airbag system gives the front
occupants additional protection for the head and chest in the event of a
severe frontal collision ⇒ page 35, “Safety notes on the frontal airbag
system”.
In addition to their normal function of restraining the occupants, the seat
belts also hold the driver and front passenger in a position where the airbags
can provide maximum protection in a frontal collision.
The airbag system is not a substitute for seat belts, but it is an integral part
of the vehicle's overall passive safety system. Please bear in mind that the
airbag system can only work effectively when the occupants are wearing their
seat belts correctly and have adjusted the head restraints properly. Therefore,
it is most important to wear the seat belts at all times, not only because this
is required by law in most countries, but also for your safety ⇒ page 19,
“Brief Introduction”.
WARNING (continued)
Fig. 17 Driver airbag
located in steering wheel
Fig. 18 Front passenger
airbag located in dash
panel
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Airbag system33
Safety First
Controls and equipment
Practical tips
Technical Data
The main parts of the front airbag system are:
•an electronic control and monitoring system (control unit),•the two front airbags (airbag with gas generator) for the driver and front
passenger,•a warning lamp
 in the dash panel insert ⇒page 30.
The airbag system operation is monitored electronically. The airbag warning
lamp will light up for a few seconds every time the ignition is switched on
(self-diagnosis).
There is a fault in the system if the warning lamp

•does not light up when the ignition is switched on ⇒ page 30•after the ignition is switched on, it turns off after 4 seconds,•it turns off and then lights up again after the ignition is switched on,•lights up or flashes while the car is moving.
The front airbag system will not be triggered if:•the ignition is switched off,•there is a minor frontal collision,•there is a side collision,•there is a rear-end collision,•the vehicle turns over.WARNING
•The seat belts and airbags can only provide maximum protection if the
occupants are seated correctly ⇒page 10, “Proper sitting position for
occupants”.•If a fault has occurred in the airbag system, have the system checked
immediately by a qualified workshop. Otherwise, during a frontal collision
the system may fail to trigger, or not trigger correctly.
Operation of frontal airbags
Inflated airbags reduce the risk of head or chest injury.The airbag system is designed so that the airbags for the driver and front
passenger are triggered in a severe frontal collision.
In certain types of accident the front, curtain and side airbags may be trig-
gered together.
When the system is triggered, the airbags fill with a propellant gas and
deploy in front of the driver and front passenger ⇒ fig. 19. The fully deployed
airbags cushion the forward movement of the front occupants and help to
reduce the risk of injury to the head and the upper part of the body.
The special design of the airbag allows the controlled escape of the propel-
lant gas when an occupant puts pressure on the bag. Thus, the head and
chest are surrounded and protected by the airbag. After the collision, the
airbag deflates sufficiently for the front occupants to see forward.
In order to provide the desired extra protection in an accident, the airbags
have to deploy extremely rapidly (within thousandth of a second). A fine dust
Fig. 19 Inflated front
airbags
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