ECU Seat Leon SC 2013 User Guide

24Seat belts
Seat belt protection
Passengers not wearing seat belts risk severe injuries in the
event of an accident.
Fig. 12 A driver wearing
the seat belt properly is
secured by the belt in
sharp braking
Properly worn seat belts hold the vehicle occupants in the correct sitting po-
sitions and substantially reduce the kinetic energy in the event of an acci-
dent. Seat belts also help to prevent uncontrolled movements that could
lead to severe injuries. In addition, properly worn seat belts reduce the dan-
ger of being thrown from the vehicle.
Vehicle occupants 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 de-
signed 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 that wearing seat belts is an effective means of substantially
reducing the risk of injury and improving the chances of survival in a seri-
ous accident. Furthermore, properly worn seat belts improve the protection
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 fas-
tened 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, overturns 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 all vehicle
occupants have fastened their seat belts properly before you drive off!

Safety instructions on using seat belts
If seat belts are used correctly, they can considerably reduce
the risk of injury in an accident.
– Always wear the seat belt as described in this section.
– Ensure that the seat belts can be fastened at all times and are
not damaged. 

25
Seat belts
WARNING
● If the seat belts are worn incorrectly or not at all, the risk of severe
injuries increases. The optimal protection from seat belts can be ach-
ieved only if you use them properly.
● Fasten your seat belt before every trip - even when driving in town.
The other vehicle occupants must also wear the seat belts at all times,
otherwise they run the risk of being injured.
● The seat belt cannot offer its full protection if the seat belt is not
positioned correctly.
● Never allow two passengers (even children) to share the same seat
belt.
● Always keep both feet in the footwell in front of your seat as long as
the vehicle is in motion.
● Never unbuckle a seat belt while the vehicle is in motion. Risk of fatal
injury.
● The seat belt must never be twisted while it is being worn.
● The seat belt should never lie on hard or fragile objects (such as
glasses or pens, etc.) because this can cause injuries.
● Do not allow the seat belt to be damaged or jammed, or to rub on any
sharp edges.
● Never wear the seat belt under the arm or in any other incorrect posi-
tion.
● Loose, bulky clothing (such as an overcoat over a jacket) impairs the
proper fit and function of the seat belts, reducing their capacity to pro-
tect.
● The slot in the seat belt buckle must not be blocked with paper or
other objects, as this can prevent the latch plate from engaging securely.
● Never use seat belt clips, fastening rings or similar instruments to al-
ter the position of the belt webbing.WARNING (Continued)
● Frayed or torn seat belts or damage to the connections, belt retrac-
tors or parts of the buckle could cause severe injuries in the event of an
accident. Therefore, you must check the condition of all seat belts at reg-
ular intervals.
● Seat belts which have been worn in an accident and stretched must
be replaced by a specialised workshop. Renewal may be necessary even
if there is no apparent damage. The belt anchorage should also be
checked.
● Do not attempt to repair a damaged seat belt yourself. The seat belts
must not be removed or modified in any way.
● The belts must be kept clean, otherwise the retractors may not work
properly.

Safety FirstOperating instructionsPractical TipsTechnical specifications

26Seat belts
Seat belts
Seat belt adjustment
The seat belts for the front and rear occupants are locked in-
to position by a latch.
Fig. 13 Belt buckle and
latch plate of seat belt
The seat belt cannot offer its full protection if the seat belt is not
positioned correctly.
– Adjust the seat and head restraint correctly.
– To fasten the belt, take hold of the latch plate and pull it slowly
across your chest and lap.
– Insert the latch plate into the buckle for the appropriate seat
and push it down until it is securely locked with an audible click
⇒ Fig. 13. –
Pull the belt to ensure that the latch plate is securely engaged
in the buckle.
The seat belts are equipped with an automatic retractor on the shoulder
strap. Full freedom of movement is permitted when the shoulder belt is
pulled slowly. However, during sudden braking, during travel in steep areas
or bends and during acceleration, the automatic retractor on the shoulder
belt is locked.
The automatic belt retractors on the front seats are fitted with seat belt ten-
sioners ⇒ page 29.
WARNING
● An incorrectly worn seat belt can cause severe injuries in the event of
an accident.
● The seat belts offer best protection only when the backrests are in an
upright position and the seat belts have been fastened properly.
● Never put the latch plate in the buckle of another seat. If you do this,
the seat belt will not protect you properly and the risk of injury is in-
creased.
● If a vehicle occupant is incorrectly belted in, the seat belt cannot pro-
tect him or her properly. An incorrectly positioned seat belt can cause ex-
tremely severe injuries.
● Always engage the retractor lock when you are securing a child seat
in group 0, 0+ or 1 ⇒ page 48.


28Seat belts
Pregnant women must also fasten their seat belts properly
The best protection for the unborn child is for the mother to
wear the seat belt properly at all times during the pregnan-
cy.
Fig. 16 Positioning seat
belts during pregnancy
The seat belt provides maximum protection only when the seat belt
is properly positioned ⇒ page 27.
– Adjust the front seat and head restraint correctly ⇒ page 10.
– Holding the latch plate, pull the belt evenly across your chest
and as low as possible over the pelvis ⇒ Fig. 16.
– Insert the latch plate into the buckle for the corresponding seat
and push it down until it is securely locked with an audible click
⇒ 
.
– Pull the belt to ensure that the latch plate is securely engaged
in the buckle.
WARNING
● An incorrectly worn seat belt can cause severe injuries in the event of
an accident.
● For pregnant women, the lap part of the seat belt must lie as low as
possible over the pelvis, never across the stomach, and always lie flat so
that no pressure is exerted on the abdomen.
● Read and observe the warnings ⇒ page 24.

Seat belt release
The seat belt must not be unfastened until the vehicle has
come to a standstill.
Fig. 17 Remove latch
plate from buckle
– Press the red button on the belt buckle ⇒ 
Fig. 17. The latch
plate is released and springs out ⇒ 
.

32Airbag system
WARNING (Continued)
● To reduce the risk of injury from an inflating airbag, always wear the
seat belt properly ⇒ page 20.
● 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 front 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 transpor-
ted 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 45. When transporting children, use a child seat suitable for the
age and size of each child ⇒ page 48.
For those vehicles that do not include a key lock switch to turn the airbag
off, a Technical Service 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 project 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, a Technical Service 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 45.
– Child seats 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 48, 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.


49
Child safety
WARNING
● Never install a child seat facing backwards on the front passenger
seat unless the front passenger front airbag has been disabled. Risk of
potentially fatal injuries to the child! However, if it is necessary, in excep-
tional cases, to transport a child in the front passenger seat, the front
passenger front airbag must always be disabled ⇒ page 45. If the pas-
senger seat has a height adjustment option, move it to the highest, most
upright position. If you have a fixed seat, do not install any child restraint
system in this location.
● For those vehicles that do not include a key lock switch to deactivate
the airbag, the vehicle must be taken to a Technical Service.
● All vehicle occupants, especially children, must assume the proper
sitting position and be properly belted in while travelling.
● Never hold children or babies on your lap, this can result in potential-
ly fatal injuries to the child!
● Never allow a child to be transported in a vehicle without being prop-
erly secured, or to stand up or kneel on a seat while travelling. In an acci-
dent, the child could be flung through the vehicle, causing possibly fatal
injuries to themselves and to the other vehicle occupants.
● If children assume an improper sitting position when the vehicle is
moving, they expose themselves to greater risk of injury in the event of a
sudden braking manoeuvre or in an accident. This is particularly impor-
tant if the child is travelling on the front passenger seat and the airbag
system is triggered in an accident; as this could cause serious injury or
even death.
● A suitable child seat can protect your child!
● Never leave an unsupervised child alone on a child seat or in the vehi-
cle.
● Depending on weather conditions, it may become extremely hot or
cold inside the vehicle. This can be fatal.WARNING (Continued)
● Children who are less than 1.5 metres tall must not wear a normal
seat belt without a child seat, as this could cause injuries to the abdomi-
nal and neck areas during a sudden braking manoeuvre or in an accident.
● Do not allow the seat belt to become twisted or jammed, or to rub on
any sharp edges.
● Incorrectly worn seat belts can cause injuries even in a minor colli-
sion or in sudden braking manoeuvres.
● The seat belt provides maximum protection only when the seat belt is
properly positioned ⇒ page 26, Seat belts.
● Only one child may occupy a child seat ⇒ page 50, Child seats.

Safety FirstOperating instructionsPractical TipsTechnical specifications

53
Child safety
Securing child seats
Ways to secure a child seat
A child seat can be secured differently on the rear seat and
on the front passenger seat.
Fig. 33 On the rear seats: figure A shows the basic child restraint system mounting
using lower retaining rings and the upper retaining strap figure B shows the child re-
straint system mounting using the vehicle seat belt
You can secure a child seat to the rear seat or front passenger seat in the
following ways:
● Child seats in groups 0 to 3 can be secured with a seat belt.
● Child seats in groups 0, 0+ and 1 with the ISOFIX and Top Tether* sys-
tems can be secured without using the seatbelt, thanks to the ISOFIX and
Top Tether* securing rings ⇒ page 55.
● During installation of some models of group I, II and III child seats in the
rear seat, difficulty may arise in mounting the seat given that it comes into
contact with the head restraint. In this case adjust the height of the head restraint or remove it from the seat following the instructions in the corre-
sponding chapter ⇒ 
page 131. Once you remove the child seat, replace the
head restraint in its original position. 
Securing the child seat using the seat belt
The seat belt may be used to secure universal type child seats to the vehicle
seats marked with a U in the table below.
● If the front passenger seat lacks a height adjustment, child seats cannot
be mounted is this location.
Mass groupSeating positionFront passenger seatRear side seatRear centralseat
Group 0
to 10 kgU*UU
Group 0+ to 13 kgU*UU
Group I
9 to 18 kgU*UU
Group II
15 to 25 kgU*UU
Group III
22 to 36 kgU*UU
Suitable for universal restraint systems for use in this mass group.
Only compatible for models with adjustable seat height. Place seat in
the backmost highest position possible. 
U:
*:
Safety FirstOperating instructionsPractical TipsTechnical specifications

54Child safety
WARNING
● When travelling, children must be secured in the vehicle with a re-
straint system suitable for age, weight and size.
● Never install a child seat facing backwards on the front passenger
seat unless the front passenger airbag has been disabled. This could
cause fatal injuries to the child! However, if, in exceptional cases, it is
necessary to transport a child in the front passenger seat, the front pas-
senger airbag ⇒ page 45 must always be disabled and the seat adjusted
to its backmost highest position, where possible.
● Read and always observe information and warnings concerning the
use of child seats ⇒ page 48.


55
Child safety
Child seats fastened with the “ISOFIX” and Top Tether* system
Child seats with the “ISOFIX” and Toptether* system can be secured quickly, easily and safely on the rear outer seats. Two “ISOFIX” retaining rings are fitted on each rear seat. In some vehicles,
the rings are secured to the seat frame and, in others, they are secured to
the rear floor. The access to the ISOFIX rings is between the rear seat back-
rest and the seat cushioning. The Top Tether* anchors are located at the
rear of the backrests of the rear seats (behind the seat backrest or in the
luggage compartment). To understand the compatibility of the "ISOFIX" systems in the vehicle, con-
sult the table below.
●
The allowed body weight for the child seat or information regarding size
A to F is indicated on the label on the child seat with certification universal
or semi-universal.
Mass groupSize classElectrical equipmentMounting directionVehicle Isofix positionsRear side seats
Baby carrierFISO/L1Backward-facingXGISO/L2Backward-facingXGroup 0 to 10 kgEISO/R1Backward-facingIU
Group 0+ to 13 kgEISO/R1Backward-facingIUDISO/R2Backward-facingIUCISO/R3Backward-facingIU
Group I 9 to 18 kg
DISO/R2Backward-facingIUCISO/R3Backward-facingIUBISO/F2Forward-facingIUB1ISO/F2XForward-facingIUAISO/F3Forward-facingIUGroup II 15 to 25 kg------Forward-facing---Group III 22 to 36 kg------Forward-facing---
Suitable for ISOFIX universal child restraint systems approved for use in
this mass group
ISOFIX position not suitable for ISOFIX child restraint systems for this
mass group or size class 
IU:
X:
Safety FirstOperating instructionsPractical TipsTechnical specifications

56Child safety
WARNING
● The securing rings are designed only for use with ISOFIX and Top
Tether* child seats.
● Never secure child seats that do not have the ISOFIX and Top Tether*
system, retaining belts or other objects to the securing rings – this could
result in potentially fatal injuries to the child!
● Ensure that the child seat is secured correctly using the “ISOFIX” and
Top Tether* securing rings.

ISOFIX child seat mounting system
Fig. 34 ISOFIX securing
rings
When removing or fitting the child seat, please be sure to follow
the manufacturer's instructions.
– Remove the protective caps of the “ISOFIX” rings by placing a
finger in the hole and pulling up ⇒ 
Fig. 34. –
Press the child seat onto the ISOFIX retaining rings until the
child seat can be heard to engage securely. If the child seat is
equipped with Toptether* anchor points, secure it to the corre-
spondent ring. Follow the manufacturer's instructions.
– Do a test by pulling both sides of the child seat to ensure that it
is properly anchored.
Child seats with the ISOFIX and Top Tether* attachment system are available
from Technical Services. 
Top Tether retainer straps*
Some child restraint seats have a third Top Tether anchoring
point, apart from both “ISOFIX” anchoring points, which al-
low better child retention.
Fig. 35 Position of the
Top Tether rings on the
back of the rear seat 