2012 Seat Leon 5D sensor

28Seat belts
–Guide the belt back by hand so that it rolls up easily and the
trim is not damaged.
WARNING
Never unbuckle a seat belt while the vehicle is in motion. If you do, you
increase the risk of sustaining severe or fatal injuries.

Incorrectly fastened seat belts
Incorrectly worn seat belts can cause severe or even mortal
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 sub-
stantially the protection a seat belt offers and can lead to severe or
fatal injuries. The risk of severe or fatal injuries is especially in-
creased when a deploying airbag strikes a vehicle occupant who
has assumed an incorrect sitting position. As the driver, you are re-
sponsible for yourself and all passengers, especially children.
Therefore:
– Never allow anyone to wear the seat belt incorrectly while the
vehicle is moving ⇒ 
.
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 for the whole journey.
● Read and always observe information and warnings concerning the
use of seat belts ⇒ page 23.

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 occupants in the front seats 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 retracts and tightens the seat belts, reducing the forward motion
of the occupants.
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. 

39
Airbag system
Side airbags* Description of side airbags
The airbag system is not a substitute for the seat belts.
Fig. 23 Side airbag in
driver seat
The side airbags are located in the backrest cushions of the driver seat
⇒  Fig. 23 and the front passenger seat as well as in the rear seats*. The lo-
cations 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 41, Safety notes on the operation of the side airbag
system.
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 in 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 control lamp  in the dash panel
The airbag system operation is monitored electronically. The airbag control
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. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

41
Airbag system
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. 
Safety notes on the operation of the side airbag system
If airbags are used correctly, they can considerably reduce
the risk of injury in side impact collisions.
WARNING
● If you do not wear a seat belt, if you lean forward, or are not seated
correctly while the vehicle is in motion, you are at a greater risk of injury
if the side airbag system is triggered in an accident.
● In order for the side airbags to provide their maximum protection, the
prescribed sitting position must always be maintained with seat belts
fastened while travelling.
● Occupants of the outer seats must never carry any objects or pets in
the deployment space between them and the airbags, or allow children
or other passengers to travel in this position. It is also important not to
attach any accessories (such as cup holders) to the doors. This would im-
pair the protection offered by the side airbags.
● The built-in coat hooks should be used only for lightweight clothing.
Do not leave any heavy or sharp-edged objects in the pockets.
● Great forces, such as hard blows or kicks, must not be exerted upon
the backrest bolster because the system may be damaged. In this case,
the side airbags would not be triggered.
WARNING (Continued)
● Under no circumstances should protective covers be fitted over seats
with side airbags unless the covers have been approved for use in your
vehicle. Because the airbag deploys from the side of the backrest, the
use of conventional seat covers would obstruct the side airbag, seriously
reducing the airbag's effectiveness.
● Any damage to the original seat upholstery or around the seams of
the side airbag units must be repaired immediately by a specialised
workshop.
● The airbags provide protection for just one accident; replace them
once they have deployed.
● When children assume an incorrect sitting position, they expose
themselves to an increased risk of injury in the event of an accident. This
is particularly the case if the child is travelling on the front passenger
seat and the airbag system is triggered in an accident; this could have
critical consequences including serious injury or death ⇒ page 47.
● Any work on the side airbag system or removal and installation of the
airbag components for other repairs (such as removal of the front seat)
should only be performed by a specialised workshop. Otherwise, faults
may occur during the airbag system operation.
● Do not attempt to modify components of the airbag system in any
way.
● The side and head airbags are managed through sensors located in
the interior of the front doors. To ensure the correct operation of the side
and head airbags neither the doors nor the door panels should be modi-
fied in any way (e.g. fitting loudspeakers). If the front door is damaged,
the airbag system may not work correctly. All work carried out on the
front door must be done in a specialised workshop.

Safety FirstOperating instructionsPractical TipsTechnical specifications

43
Airbag system
In certain types of accident the front, side and curtain airbags may be trig-
gered together.
When the system is triggered, the airbag is filled with propellant gas. In the
process, the curtain airbag covers the side windows and door pillars.
The airbags deploy extremely rapidly, within thousandths of a second, to
provide additional protection in the event of an accident. A fine dust may
develop when the airbag deploys. This is normal and it is not an indication
of fire in the vehicle.
The fully deployed airbags cushion the movement of the front occupants
and help to reduce the risk of injury to the upper 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. 
Safety notes on the operation of the curtain airbag system
If you use airbags correctly, they can considerably reduce
the risk of injury in many kinds of accident.
WARNING
● In order for the side airbags to provide their maximum protection, the
prescribed sitting position must always be maintained with seat belts
fastened while travelling.
● For safety reasons, the curtain airbag must be disabled in those vehi-
cles fitted with a screen dividing the interior of the vehicle. See a Techni-
cal Service to make this adjustment.
WARNING (Continued)
● There must be no other persons, animals or objects between the oc-
cupants of the outer seats and the deployment space of the curtain air-
bags so that the curtain airbag can deploy without restriction and pro-
vide the greatest possible protection. Therefore, sun blinds which have
not been expressly approved for use in your vehicle may not be attached
to the side windows.
● The built-in coat hooks should be used only for lightweight clothing.
Do not leave any heavy or sharp-edged objects in the pockets. Please, do
not hang the clothes on coat hangers.
● The airbags provide protection for just one accident; replace them
once they have deployed.
● Any work on the curtain airbag system or removal and installation of
the airbag components for other repairs (such as removal of the roof lin-
ing) should only be performed by a specialised workshop. Otherwise,
faults may occur during the airbag system operation.
● Do not attempt to modify components of the airbag system in any
way.
● The side and head airbags are managed through sensors located in
the interior of the front doors. To ensure the correct operation of the side
and head airbags neither the doors nor the door panels should be modi-
fied in any way (e.g. fitting loudspeakers). If the front door is damaged,
the airbag system may not work correctly. All work carried out on the
front door must be done in a specialised workshop.

Safety FirstOperating instructionsPractical TipsTechnical specifications

94Opening and closing
● When the door is mechanically unlocked using the vehicle key without
turning the ignition within the following 15 seconds.
● A door is opened.
● The bonnet is opened.
● The rear lid is opened.
● When the ignition is switched on with a non-authorised key.
● When the vehicle battery is disconnected.
● Movement inside the vehicle (in vehicles with interior monitoring
⇒ page 95).
● When the vehicle is towed (in vehicles with anti-tow system
⇒ page 95).
● When the vehicle is raised (in vehicles with anti-tow system
⇒ page 95).
● When the vehicle is transported on a ferry or by rail (vehicles with an an-
ti-tow system or vehicle interior monitoring ⇒ page 95).
● When a trailer connected to the anti-theft alarm system is disconnected.
How to turn OFF the alarm
Unlock the vehicle with the unlocking button on the key or turn on the igni-
tion with a valid key.
Note
● The alarm will be triggered once more when anybody enters the same
zone of surveillance or any other zone. If, for example, after opening a door,
the rear lid is also opened.
● The anti-theft alarm 
is not activated when the vehicle is locked from
the inside using the central locking button. ●
If the driver door is unlocked mechanically with the key, only the driver
door is unlocked, the rest of the doors remain locked. Only when the igni-
tion has been turned on will the other doors be available - but not unlocked
- and the central lock button activated.
● If the vehicle battery is run down or flat then the anti-theft alarm will not
operate correctly. 
Vehicle interior monitoring and anti-tow system*
Monitoring or control function incorporated in the anti-theft
alarm* which detects unauthorized vehicle entry by means
of ultrasound.
Activation
– It is automatically switched on when the anti-theft alarm is acti-
vated.
Deactivation
– Open the vehicle with the key, either mechanically 1)
or by press-
ing the 
button on the remote control.
– Press the button 
on the remote control twice. The volumetric
sensor and tilt sensors will be deactivated. The alarm system re-
mains activated.
The vehicle interior monitoring and the anti-tow system are automatically
switched on again next time the vehicle is locked. 
1)
The time period from when the door is opened until the key is inserted in the contact
should not exceed 15 sec., otherwise the alarm will be triggered.

95
Opening and closing
The vehicle interior monitoring and anti-tow sensor (tilt sensor) are auto-
matically switched on when the anti-theft alarm is switched on. In order to
activate it, all the doors and the rear lid must be closed.
If you wish to switch off the vehicle interior monitoring and the anti-tow sys-
tem, it must be done each time that the vehicle is locked; if not, they will be
automatically switched on.
The vehicle interior monitoring and the anti-tow system should be switched
off if animals are left inside the locked vehicle (otherwise, their movements
will trigger the alarm) or when, for example, the vehicle is transported or
has to be towed with only one axle on the ground.
False alarms
The interior monitoring only operates correctly if the vehicle is completely
closed. Please observe legal requirements when doing so.
The following cases may cause a false alarm:
● opened windows (partially or fully)
● panoramic/tilting sunroof open (partially or completely).
● movement of objects inside the vehicle, such as loose papers, items
hanging from the rear vision mirror (air fresheners), etc.
Note
● If the vehicle is relocked and the alarm is activated without the volumet-
ric sensor function, relocking will activate the alarm with all its functions,
except the volumetric sensor. This function is reactivated when the alarm is
switched on again, unless it is deliberately switched off.
● If the alarm has been triggered by the volumetric sensor, this will be in-
dicated by a flashing of the warning lamp on the driver door when the vehi-
cle is opened. The flash is different to the flash indicating the alarm is acti-
vated. ●
The vibration of a mobile phone left inside the vehicle may cause the ve-
hicle interior monitoring alarm to trigger, as both sensors react to move-
ments and shakes inside the vehicle.
● If on activating the alarm, any door or the rear lid is open, only the alarm
will be activated. The vehicle interior monitoring and the anti-tow system
will only be activated once all the doors are closed (including the rear lid). 
Deactivating the vehicle interior monitoring and tow-away
protection 1)
Fig. 51 Vehicle interior
monitoring/tow-away
protection button
When the vehicle is locked, the alarm will be triggered if move-
ments are detected in the interior (e.g. by animals) or if the vehi-
cle's inclination is changed (e.g. during transport). You can prevent
the alarm from being triggered accidentally by switching off the ve-
hicle interior monitoring and/or tow-away protection.
– To switch off the vehicle interior monitoring and tow-away pro-
tection, switch off the ignition and press button ⇒ Fig. 51. The
button will light up. 
1)
Only available in certain markets.
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109
Lights and visibility
Lights and visibility: functions
Parking light
When the parking light is switched on, (right or left turn signal), the front
side light and the rear light on the corresponding side of the vehicle stay lit.
The parking lights can only be activated with the ignition switched off and
the turn signal and main beam lever in the central position, before being
triggered.
Parking light on both sides
With the ignition switched off and the light switch in position , when lock-
ing the vehicle from the outside, the parking lights on both sides of the ve-
hicle light up. In doing so, only the side lights of both headlights light up,
and additionally the tail lights will do so partially.
Daytime driving light*
The daytime driving lights consist of individual lights, integrated in the front
headlights. With the daylight driving lights on, only these lights switch on
⇒ 
.
The daytime driving lights switch on every time the ignition is switched on,
if the switch is in positions  or , according to the level of exterior light-
ing.
When the light switch is in position , a light sensor automatically
switches dipped beam on and off (including the control and instrument
lighting) or the daytime driving lights depending on the level of exterior
lighting.
Automatic dipped beam control 
The automatic dipped beam control is merely intended as an aid and is not
able to recognise all driving situations. When the light switch is in position 
, the vehicle lights and the instru-
ment panel and switch lighting switch on and off automatically in the fol-
lowing situations ⇒ 
:
Automatic switching on:Automatic switching off:The photo sensor detects darkness,
for example, when driving through a
tunnel.When adequate lighting is detected.
The rain sensor detects rain and ac-
tivates the windscreen wipers.When the windscreen wipers have
been inactive for a few minutes.
Cornering lights* 1)
When turning slowly or on very tight bends, the cornering lights are activa-
ted automatically. The cornering lights may be integrated in the fog lights
and are switched on only at speeds of less than 40 km/h (25 mph).
When reverse gear is engaged, the cornering lights on both sides of the ve-
hicle switch on, in order to better illuminate the area for parking.
Motorway lights*
The motorway lights are available on vehicles equipped both with full-LED
lights and headlights that switch on automatically.
● They are activated when the light switch is in position .
● They are deactivated when the light switch is not in position .
When going above 110 km/h (75 mph) for more than 30 seconds, the dip-
ped beam raises slightly to increase the distance of visibility of the driver.
When reducing the speed of the car below 100 km/h (60 mph), the dipped
beam returns to its normal position. 
1)
This function is not available on vehicles equipped with full-LED headlights.
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113
Lights and visibility
When a car that is manufactured in a country that drives on the right travels
to a country that drives on the left (or vice versa), it is normally necessary to
cover part of the headlight bulbs with stickers or to change the adjustment
of the headlights to avoid dazzling other drivers.
In such cases, the regulations specify certain light values that must be com-
plied with for designated points of the light distribution. This is known as
“Tourist light”.
The light distribution that the halogen and full-LED headlights of the SEAT
Leon range have, allows the specific “tourist light” values to be met without
the need for stickers or changes in the settings.
Note
“Tourist light” is only allowed temporarily. If you are planning a long stay in
a country that drives on the other side, you should take the vehicle to an
Authorised Technical Service to change the headlights. 
“Coming home” and “Leaving home” function (guidance
lights)*
The “Coming home” function should be switched on manually. However the
“Leaving home” function is automatically controlled by a photo sensor.
“Coming home”Necessary operations
To switch sys-
tem on:
– Switch off the ignition.
– Briefly flash the headlights for approximately one sec-
ond ⇒ page 107.
The “Coming home” lighting comes on when the driver
door is opened. The delay in switching off the headlights
is counted from when the last door or rear lid is closed.
The system
switches off:
– Automatically at the end of the delay period.
– Automatically, if 30 seconds after coming on, a vehicle
door or the rear lid remains open.
– If the light switch is turned to position .
– If the ignition is switched on.
“Leaving home”Necessary operationsTo switch sys-
tem on:– Unlock the vehicle when the light switch is in position
 and the photo sensor detects darkness.
The system
switches off:– Automatically, at the end of the delay period.
– When the vehicle is locked.
– When the light switch is turned to position .
– When the ignition is switched on.
Note
● In the Easy Connect system, the duration of the lighting can be adjus-
ted, and the function activated and deactivated ⇒ page 79 using the button 
and the function button Setup.
● When the “Coming home” function is activated, a tone can be heard
when the driver door is opened to warn that the light remains switched on. 
Safety FirstOperating instructionsPractical TipsTechnical specifications