Seat Leon 5D 2011 Owner's Guide

29
Seat belts
Seat belt tensioners
Function of the seat belt tensioner
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 tensioners.
Sensors will only trigger the belt tensioners during severe head-on, lateral
and rear collisions, and only if the seat belt is actually being worn. This re-
tracts and tightens the seat belts, reducing the forward motion of the occu-
pants.
The seat belt tensioner can be triggered only once.
The seat belt tensioners 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 seat belt tensioners 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. Specialised workshops are famili-
ar with these regulations, which are also available to you. 
Service and disposal of belt tensioners
The belt tensioners are components of the seat belts that are installed in
the seats of your vehicle. If you work on the belt tensioners or remove and
install parts of the system when performing other repair work, the seat belt
may be damaged. The consequence may be that, in the event of an acci-
dent, the belt tensioners function incorrectly or not at all. So that the effectiveness of the seat belt tensioner is not reduced and that
removed parts do not cause any injuries or environmental pollution, regula-
tions, which are known to the specialised workshops, must be observed.
WARNING
● Improper use or repairs not carried out by qualified mechanics in-
crease the risk of severe or fatal injuries. The belt tensioners may fail to
trigger or may trigger in the wrong circumstances.
● Never attempt to repair, adjust, remove or install parts of the belt ten-
sioners or seat belts.
● The seat belt tensioner, seat belt and automatic retractor cannot be
repaired.
● Any work on the belt tensioners and seat belts, including the removal
and refitting of system parts in conjunction with other repair work, must
be performed by a specialised workshop only.
● The belt tensioners will only provide protection for one accident and
must be changed if they have been activated.

Safety FirstOperating InstructionsPractical TipsTechnical Specifications

30Airbag system
Airbag system
Brief introduction Why 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 sit-
ting position must be assumed.For your own safety and the safety of the passengers, please en-
sure the following before driving:
– Always wear the seat belt properly ⇒ page 19.
– Adjust the driver 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 system to protect children in your
vehicle ⇒ page 46.
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 vehi-
cle 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, no matter how serious, is not a
determining factor for the airbags to have been triggered.
WARNING
● Wearing the seat belt incorrectly or assuming an incorrect sitting po-
sition 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. Children up to
12 years old should always travel on the rear seat. Never transport chil-
dren 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 sub-
stantially increased risk of injury. This increased risk of injury will be fur-
ther increased if you are struck by an inflating airbag. 

31
Airbag system
WARNING (Continued)
● To reduce the risk of injury from an inflating airbag, always wear the
seat belt properly ⇒ page 19.
● Always adjust the front seats properly.

The danger of fitting a child seat on the front passenger
seat
Rear-facing child seats must never be used on the front pas-
senger seat when the front passenger airbag is enabled. The front passenger airbag is a serious risk for a child if it is activated. The
front passenger seat is life threatening to a child if he/she is transported in
a rear-facing child seat. Children up to 12 years old should always travel 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 force that it can cause critical or fatal injuries.
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 44. When transporting children, use a child seat appropriate to
the age and size of each child ⇒ page 46.
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 in-
creases.
● 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 in-
juries if 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 back-
rest.
● 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 es-
sential that you observe the following safety measures:
–Deactivate the front passenger airbag ⇒ page 44, 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 manu-
facturer and observe the safety instructions ⇒ page 46, Child safe-
ty.
– 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 po-
sition.

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32Airbag system
Warning lamp for airbag and seat belt tensioner 
This warning lamp monitors the airbag and seat belt ten-
sioner system.
The warning lamp monitors all airbags and seat belt tensioners in the vehi-
cle, including control units and wiring connections.
Monitoring of airbag and belt tensioner system
Both the airbag and belt tensioner systems operation is constantly moni-
tored 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,
● turns off and then lights up again after the ignition is switched on,
● lights up or flashes while the vehicle 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 instrument panel for approx. 10 seconds and a short acoustic
signal is given. In this event, you should have a specialised workshop check
the 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 tensioner system cannot
properly perform its protective function.
● If a malfunction occurred, have the system checked immediately by a
specialised workshop. Otherwise, in the event of an accident, the airbag
system and belt tensioners may not be triggered, or may not be triggered
correctly.

Repairs, maintenance and disposal of airbags
The parts of the airbag system are installed in various places in your vehi-
cle. If work is carried out on the airbag system or parts have to be removed
and fitted on the system when performing other repair work, parts of the air-
bag system may be damaged. In the event of an accident this could cause
the airbag to inflate incorrectly or not inflate at all.
The relevant safety requirements must be observed when the vehicle or
components of the airbag are scrapped. Specialised workshops and vehicle
disposal centres are familiar with these requirements.
WARNING
● If repairs are not carried out by a professional, or if the airbags are
used incorrectly, the risk of severe or fatal injuries is increased. The air-
bags may fail to inflate, or could inflate in the wrong circumstances.
● Do not cover or stick anything on the steering wheel hub or the sur-
face of the airbag unit on the passenger side of the dash panel, 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. 

33
Airbag system
WARNING (Continued)
● 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 mod-
ule surface with cleaners containing solvents. Solvents cause the surface
to become porous. If the airbag triggered, plastic parts could become de-
tached and cause 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 air-
bag components for other repairs (such as repairs to the steering wheel)
should be performed only by a specialised workshop. Specialised work-
shops have the necessary tools, repair information and qualified person-
nel.
● We strongly recommend you to go to a specialised 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.
For the sake of the environment
The airbags, which are a special type of waste, must be disposed of through
an authorised service, because they contain pyrotechnic elements. 
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34Airbag system
Front airbags
Description of front airbags
The airbag system is not a substitute for the seat belts.
Fig. 17 Driver airbag lo-
cated in steering wheel
Fig. 18 Front passenger
airbag located in dash
panel 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 dash panel ⇒ fig. 18. Air-
bags 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 se-
vere frontal collision ⇒ page 37, Safety notes on the front 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 air-
bags 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.
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  on the instrument panel ⇒ page 32
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 32
● after the ignition is switched on, it turns off after 4 seconds,
● turns off and then lights up again after the ignition is switched on,
● lights up or flashes while the vehicle is moving. 

35
Airbag system
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 specialised workshop. Otherwise, during a frontal colli-
sion the system may fail to trigger, or not trigger correctly.
 Operation of front airbags
Inflated airbags reduce the risk of head or chest injury.
Fig. 19 Inflated front air-
bags
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 de-
ploy 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 to allow visibility.
The airbags deploy extremely rapidly, within thousandths of a second, to
provide additional protection in the event of an accident. A fine dust may 
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36Airbag system
develop when the airbag deploys. This is normal and it is not an indication
of fire in the vehicle. 
Airbag covers when the frontal airbags are triggered
Fig. 20 Airbag covers reacting when the front airbags
are triggered
The airbag covers fold out of the steering wheel or dash panel when the
driver and front passenger airbags are triggered ⇒ fig. 20. The airbag covers
remain connected to the steering wheel or the dash panel. 

37
Airbag system
Safety notes on the front airbag system
If you use airbags correctly, they can considerably reduce
the risk of injury in many kinds of accident.
WARNING
● It is important for the driver and front passenger to keep a distance of
at least 25 cm from the steering wheel and dash panel. If the minimum
distance is not observed then the airbags do not correctly protect the ve-
hicle occupants; risk of fatal injuries! In addition, the front seats and
head restraints must always be positioned correctly for the height of the
occupant.
● 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 sub-
stantially increased risk of injury. This increased risk of injury will be fur-
ther increased if you are struck by an inflating airbag.
● Never let a child travel on the front seat without an appropriate re-
straint system. If the airbag is triggered in an accident, children can sus-
tain serious or fatal injuries from the airbag as it inflates ⇒ page 46,
Child safety.
● The deployment space between the front passengers and the airbags
must not in any case be occupied by other passenger, pets and objects.
● The airbags provide protection for just one accident; replace them
once they have deployed.
● It is also important not to attach any objects such as cup holders or
telephone mountings to the surfaces covering the airbag units.
● Do not attempt to modify components of the airbag system in any
way.

Safety FirstOperating InstructionsPractical TipsTechnical Specifications

38Airbag system
Side airbags*
Description of side airbags
The airbag system is not a substitute for the seat belts.
Fig. 21 Side airbag in
driver seat
The side airbags are located in the backrest cushions of the driver seat
⇒ fig. 21 and the front passenger seat as well as in the rear seats. The loca- tions are identified by the text “AIRBAG” in the upper region of the backr-
ests.
Together with the seat belts, the side airbag system gives the front seat oc-
cupants additional protection for the upper body in the event of a severe
side collision ⇒ page 40, Safety notes on the operation of the side airbagsystem.
In a side collision, the side airbags reduce the risk of injury to passengers
on the front seats to the areas of the body facing the impact. In addition to
their normal function of protecting the occupants in a collision, the seat
belts also hold the passengers on the front seats and the outer rear seats in
a position where the side airbags can provide maximum protection. 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. 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.
The side airbag system will not be triggered if:
● the ignition is switched off
● there is a minor side collision
● there is a frontal collision
● there is a rear-end collision
● the vehicle turns over
The main parts of the airbag system are:
● an electronic control and monitoring system (control unit)
● the side airbags in the sides of the backrests of the front and rear seats
● a warning lamp  on the instrument panel ⇒ page 32
The airbag system operation is monitored electronically. The airbag warning
lamp will light up for approx. 4 seconds every time the ignition is switched
on (self-diagnosis).
WARNING
● In a side-on collision the side airbags will not work if the sensors do
not correctly measure the pressure increase on the interior of the doors,
due to air escaping through the areas with holes or openings in the door
panel.
● Never drive the vehicle if the interior panels have been removed.
● Never drive if the interior door panels have been removed or if the
panels have not been correctly fitted. 