ECU Seat Leon 5D 2017 User Guide

Safety
Seat belts
Wh y
w
ear a seat belt
Number of seats Your vehicle has
five se
ats, two in the front
and three in the rear. Each seat is equipped
with a three-point seat belt.
In some versions, your vehicle is approved
only for four seats. Two front seats and two
rear seats. WARNING
● Never tr an

sport more than the permitted
amount of people in your vehicle.
● Every vehicle occupant must properly fas-
ten and we
ar the seat belt belonging to his or
her seat. Children must be protected with an
appropriate child restraint system. Seat belt control lamp* 
Fig. 89
Instrument panel: right rear seat oc-
c upied and c
orr

esponding seat belt fastened
display. The control lamp illuminates to remind the
driv
er t
o f

asten his seat belt.
Before starting the vehicle: – Fasten your seat belt securely.
– Instruct your passengers to fasten their
seat belts

properly before driving off.
– Protect children by using a child seat ac-
cordin

g to the child's height and weight.
When the ignition is switched on, the control
lamp  in the instrument panel lights up (de-
pending on the model version) if the driver or
passenger have not fastened their seat belts.
When starting to drive, if the vehicle's speed
surpasses approx. 25 km/h (15 mph) and the
seat belts are not fastened or are unfastened during the drive, a warning sound will be
heard f

or a few seconds. The warning light
will also flash .
The lamp  goes out when the driver and
passenger seat belts are fastened with the ig-
nition switched on.
Rear seat belts fastened display*
Depending on the model version, when the
ignition is switched on, the seat belt status
display ››› Fig. 89 on the instrument panel in-
forms the driver whether the passengers in
the rear seats have fastened their seat belts.
The  symbol indicates that the passenger in
this seat has fastened “his or her” seat belt.
When a seat belt in the rear seats is fastened
or unfastened, the seat belt status is dis-
played for approximately 30 seconds. The in-
dication can be hidden by pressing the 0.0/SET button on the dash panel.
The se at
belt

status flashes for a maximum of
30 seconds when a seat belt in the rear seats
is unfastened while the vehicle is in motion.
An audible warning will also be heard if the
vehicle is travelling at over 25 km/h
(15 mph).
80

Seat belts
possible to brace oneself with one's hands.
In a fr ont
al
collision, unbelted passengers
are thrown forward and will make violent con-
tact with the steering wheel, dash panel,
windscreen or whatever else is in the way
››› Fig. 91.
It is also important for rear passengers to
wear seat belts properly, as they could other-
wise be thrown forward violently through the
vehicle interior in an accident. Passengers in
the rear seats who do not use seat belts en-
danger not only themselves but also the front
occupants ››› Fig. 92. How to properly adjust your
seatbelt
F
astening and unfastening your seat
belt Fig. 93
Positioning and removing the seat
belt b
uc

kle. Fig. 94
Position of seat belt during pregnan-
cy . Read the additional information carefully
› ›
›

 page 20.
Fasten your 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
plat
e and pull it slowly across your chest and
lap.
● Insert the latch plate into the buckle for the
appropri
ate seat and push it down until it is
securely locked with an audible click
››› Fig. 93 A.
● Pull the belt to ensure that the latch plate is
securely
engaged in the buckle. »
83
Technical data
Advice
Operation
Emergencies
Safety

Safety
The seat belts are equipped with an automat-
ic r
etr
actor on the shoulder strap. Full free-
dom of movement is permitted when the
shoulder belt is pulled slowly. However, dur-
ing 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 tensioners
››› page 84.
Releasing the seat belt ● Press the red button on the belt buckle
›››
Fig. 93 B. The latch plate is released and
springs out ››› .
● Guide the belt back by hand so that it rolls
up e a
s

ily and the trim is not damaged.
Positioning seat belts
Seat belts offer their maximum protection on-
ly when they are properly positioned. WARNING
● The seat belt

s offer best protection only
when the backrests are in an upright position
and the seat belts have been fastened prop-
erly.
● 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 increased. ●
Never u nb

uckle a seat belt while the vehi-
cle is in motion. If you do, you increase the
risk of sustaining severe or fatal injuries.
● An incorrectly worn seat belt can cause se-
vere injurie
s 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 ››› Fig. 94.
● Always engage the retractor lock when you
are securin
g a child seat in group 0, 0+ or 1
››› page 91.
● Read and observe the warnings ›››
page 81. Seat belt tensioners
Ho w the se
at

belt tensioner works Read the additional information carefully
› ›
›

 page 21.
The seat belts for the occupants in the front
seats are equipped with belt tensioners. Sen-
sors will trigger the belt tensioners only dur-
ing severe head-on, lateral and rear-end colli-
sions and only if the seat belt is worn. This
retracts and tightens the seat belts, reducing
the forward motion of the occupants.
The belt tensioners will not be triggered in
the event of minor collisions, if the vehicle overturns, or in accidents where no major
forc

es act on the vehicle. Note
● If the se at

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
obser
ved when the vehicle or components of
the system are scrapped. Specialised work-
shops are familiar with these regulations,
which are also available to you. Maintenance and disposal of belt ten-
s
ioner
s The belt tensioners are components of the
se
at
belts

that are installed in the seats of
your vehicle. If you work on the belt tension-
ers 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 accident, the belt
tensioners function incorrectly or may not
function at all.
So that the effectiveness of the seat belt ten-
sioner is not reduced and that removed parts
do not cause any injuries or environmental
pollution, regulations, which are known to
the specialised workshops, must be ob-
served.
84

Transporting children safely
Transporting children safely Saf ety
f
or children
Introduction For safety reasons, as we have learned from
acc
ident

statistics, we recommend that chil-
dren under 12 years of age travel in the rear
seats. Depending on their age, height and
weight, children travelling in rear seats must
use a child seat or a seat belt. For safety rea-
sons, the child seat should be installed in the
rear seat, behind the front passenger seat or
in the centre back seat.
The physical laws involved and the forces
acting in a collision apply also to children
››› page 82. But unlike adults, children do not
have fully developed muscle and bone struc-
tures. This means that children are subject to
a greater risk of injury.
To reduce the risk of injuries, children must
always use special child restraint systems
when travelling in the vehicle.
We recommend the use of child safety prod-
ucts from the SEAT Original Accessories Pro-
gramme, which includes systems for all ages
made by “Peke” (not for all countries).
These systems have been especially de-
signed and approved, complying with the
ECE-R44. regulation. Follow the manufacturer's instructions and
ob
ser

ve any statutory requirements when in-
stalling and using child seats. Always read
and note ››› page 91.
We recommend you always carry the manu-
facturer's Child Seat Instruction Manual to-
gether with the on-board documentation.
Important information regarding the
front p
assenger's airbag Read the additional information carefully
› ›
›

 page 25.
Read and always observe the safety informa-
tion included in the following chapters:
● Safety distance with respect to the passen-
ger airbag ›

›› page 85.
● Objects between the passenger and the
pas
senger side airbag ››› in Front airbags
on p ag
e 87
.
The passenger side front airbag, when ena-
bled, is a serious risk for a child that is facing
backward since the airbag can strike the seat
with such force that it can cause serious or
fatal injuries. Children up to 12 years old
should always travel on the rear seat.
Therefore we strongly recommend you to
transport children on the rear seats. This is
the safest location in the vehicle. Alternative-
ly, the front passenger airbag can be disa- bled with a key-operated switch
›››
page 89.
When transporting children, use a child seat
suitable for the age and size of each child
››› page 92. WARNING
● If a c hi

ld seat is secured to the front pas-
senger seat, the risk to the child of sustain-
ing critical or fatal injuries in the event of an
accident increases.
● An inflating front passenger airbag can
strike the r
ear-facing child seat and project it
with great force against the door, the roof or
the backrest.
● Never install a child seat facing backwards
on the front p
assenger seat unless the front
passenger front airbag has been disabled.
Risk of potentially fatal injuries to the child!
However, if it is necessary, in exceptional ca-
ses, to transport a child in the front passen-
ger seat, the front passenger front airbag
must always be disabled ››› page 90. If the
passenger seat has a height adjustment op-
tion, move it to the highest, most upright po-
sition. 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 sw
itch to deactivate the airbag, the vehi-
cle 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. » 91
Technical data
Advice
Operation
Emergencies
Safety

Safety
●
Never ho l
d children or babies on your lap,
this can result in potentially fatal injuries to
the child!
● Never allow a child to be transported in a
vehicl
e without being properly secured, or to
stand up or kneel on a seat while travelling.
In an accident, the child could be flung
through the vehicle, causing possibly fatal in-
juries to themselves and to the other vehicle
occupants.
● If children assume an improper sitting posi-
tion when the vehic
le 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 important if the
child is travelling on the front passenger seat
and the airbag system is triggered in an acci-
dent; as this could cause serious injury or
even death.
● A suitable child seat can protect your child!
● Never leave a child alone in the child seat
or inside the
vehicle because depending on
the season, very high temperatures may be
reached inside a parked vehicle, which could
be fatal.
● 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
abdominal and neck areas during a sudden
braking manoeuvre or in an accident.
● Do not allow the seat belt to become twis-
ted and the seat
belt should be properly in
place ››› page 80.
● Only one child may occupy a child seat
›››

page 92, Child seats. ●
When a chi l

d seat is mounted in the rear
seats, the door child-proof lock should be ac-
tivated ››› page 133. Child seats
Safety in

structions Read the additional information carefully
›› ›

 page 25. WARNING
When travelling, children must be secured in
the v ehic

le with a restraint system suitable
for age, weight and size.
● Read and always observe information and
warning
s concerning the use of child seats
››› page 91. WARNING
The retaining rings are designed only for use
with “ISOFIX” and T op

Tether* system child
seats.
● Never secure other child seats that do not
have the “ISOFIX” or T
op Tether* system, or
retaining belts or objects to the fastening
rings - this can result in potentially fatal inju-
ries to the child.
● Ensure that the child seat is secured cor-
rectly u
sing the “ISOFIX” and Top Tether* se-
curing rings. WARNING
An undue installation of the safety seat will
incr e

ase the risk of injury in the event of a
crash.
● Never tie the retainer strap to a hook in the
luggag
e compartment.
● Never secure or tie luggage or other items
to the low
er anchorages (ISOFIX) or the upper
ones (Top Tether). Categorisation of child seats into
gr
oup
s Use only child seats that are officially ap-
pr
o
v

ed and suitable for the child.
Child seats are subject to the regulation ECE-
R 44. ECE-R stands for: Economic Commis-
sion for Europe Regulation.
The child seats are grouped into 5 catego-
ries:
Group 0: Up to 10 kg (up to around 9
months)
Group 0+: Up to 13 kg (up to around 18
months)
Group 1: from 9 to 18 kg (up to approx. 4
years old)
Group 2: from 15 to 25 kg (up to approx. 7
years old)
92

Emergencies
Rear bulbs (in the side panel) Fig. 112
Luggage compartment: location of
the bo lt
sec
uring the tail light unit. Remove
the rear light unit from side panel. Fig. 113
Retaining tabs on reverse side of tail
light. –
Check which of the bulbs is defective.
– Open the rear lid.
– Remove the cover by prying the flat side of
a s c
r

ewdriver into the recess and remove
the cover from the opening ››› Fig. 112 1 .
– Carefully loosen the screw located behind
the c o
v

er with a screwdriver, turning it anti-
clockwise (arrows) ››› Fig. 112 2 .
– Tilt the light in the direction of the arrows
unti
l

it comes out of its housing (positions
3 and
4 )
››
› Fig. 112
.
– Remove the bulb holder ›››
Fig. 113 unlock-
ing the retaining tabs 1 .
– Change the damaged bulb.
– To refit follow the steps in reverse order,
tak
in

g special care when fitting the bulb
holder. The securing tabs must click into
place. CAUTION
Take care when removing the rear light unit to
mak e s

ure there is no damage to the paint-
work or any of its components. Note
Make sure you have a soft cloth ready to
pl ac

e under the glass on the rear light unit, to
avoid any scratches. 108

Opening and closing
Opening and closing C entr
a
l locking system
Description Read the additional information carefully
›› ›

 page 15
The vehicle can be locked and unlocked via
the central locking system. There are several
methods, depending on the vehicle equip-
ment:
● key with remote control ››
›

page 127 ,
● lock on driver door (emergency opening
›››
 page 15) or
● interior central locking switch ›››

page 128.
Unlocking one side of the vehicle only
When you lock the vehicle with the key, the
doors and the rear lid are locked. When you
open the door, you can either unlock only the
driver door, or all the vehicle doors. To select
the required option, use Easy Connect*
››› page 128.
Auto Lock*
The Auto Lock function locks the doors and
the rear lid when the vehicle exceeds a speed
of about 15 km/h (9 mph). The vehicle is unlocked again when the igni-
tion key i

s removed. Alternatively, the vehicle
can also be unlocked via the central locking
switch or by pulling one of the inside door
handles. The Auto Lock function can be
switched on and off on the sound system or
on the Easy Connect* system ››› page 128.
In the event of an accident in which the air-
bags inflate, the doors will be automatically
unlocked to facilitate access and assistance.
Anti-theft alarm system*
If the anti-theft alarm system senses interfer-
ence with the vehicle it triggers an audible
and visible alarm.
The anti-theft alarm system is automatically
switched on when locking the vehicle. It
switches off when the vehicle is unlocked
from a distance.
When the driver door is unlocked with the
key, you should switch on the ignition within
15 seconds. Otherwise the alarm will be trig-
gered. On some export versions, the alarm is
triggered immediately when you open a door.
To deactivate the alarm, press the  button
on the remote control key, or switch on the
ignition. After a certain time, the alarm will
automatically switch off.
Switch off the vehicle interior monitoring and
tow-away protection if you wish to prevent the alarm from being triggered accidentally
››› page 135.
Turn signals
The turn signals will flash twice when the ve-
hicle is unlocked and once when the vehicle
is locked.
If it does not flash, this indicates that one of
the doors, the rear lid or the bonnet is not
closed correctly.
Accidental lock-out
The central locking system prevents you from
being locked out of the vehicle in the follow-
ing situations: ● If the driver door is open, the vehicle can-
not be lock
ed with the central locking switch
››› page 128.
Lock the vehicle with the remote control key,
when all the doors and the rear lid have been
closed. This prevents the accidental locking
of the vehicle. WARNING
Do not leave anyone (especially children) in
the v ehic

le if it is locked from the outside and
the anti-theft security system* is enabled, as
the doors and windows cannot then be
opened from the inside. Locked doors could
delay assistance in an emergency, potentially
putting lives at risk. » 125
Technical data
Advice
Operation
Emergencies
Safety

Opening and closing
The vehicle keys or new spare keys can be
o bt
ained fr
om a SEAT Official Service, a spe-
cialised workshop or an approved key service
qualified to create this kind of key.
New keys or spare keys must be synchron-
ised before use ››› page 132. CAUTION
All of the vehicle keys contain electronic com-
ponents. Pr ot

ect them from damage, impacts
and humidity. Note
● Only u

se the key button when you require
the corresponding function. Pushing the but-
ton unnecessarily could accidentally unlock
the vehicle or trigger the alarm. It is also pos-
sible even when you are outside the radius of
action.
● Key operation can be greatly influenced by
overl
apping radio signals close to the vehicle
working in the same range of frequencies, for
example, radio transmitters or mobile tele-
phones.
● Obstacles between the remote control and
the vehic
le, bad weather conditions and dis-
charged batteries can considerably reduce
the range of the remote control.
● If the buttons of the vehicle key are press-
ed ›››

Fig. 132 or ››› Fig. 133 or one of the cen-
tral locking buttons ››› page 128 is pressed
repeatedly in short succession, the central
locking briefly disconnects as protection against overloading. The vehicle is then un-
lock
ed. L

ock it if necessary. Unlocking/Locking by remote control
Read the additional information carefully
›› ›

 page 15
The vehicle will be locked again automatical-
ly if you do not open one of the doors or the
rear lid within 30 seconds after unlocking the
car. This function prevents the vehicle from
remaining unlocked if the unlocking button is
pressed by mistake. This does not apply if
you press the  button for at least one sec-
ond.
In vehicles with a security central locking
feature (selective unlocking of side doors)
››› page 127, when the  button is pressed
once, only the driver door and the fuel tank
flap are unlocked. When the button is press-
ed a second time, all the vehicle doors are unlocked. WARNING
Observe the safety warnings ›››
in Descrip-
tion on pag e 125
. Note
● Do not u se the r

emote control key until the
vehicle is visible. ●
Other fu nction

s of the remote control key
››› page 137, Convenience opening and clos-
ing. Selective unlocking system
The selective unlocking system allows you to
only
u

nlock the driver door and the fuel tank
flap. All other doors and the rear lid remain
locked.
Unlocking the driver door and tank flap
– Press ( once) the  b utt
on on the remote
control key or turn the key once in the
opening direction.
Unlocking all the doors, the rear lid and the
tank flap simultaneously. – Within 5 seconds, press ( twice) the
 but-
ton on the remote control key, or turn the
key twice within 5 seconds in the opening
direction.
The anti-theft security system* and the anti-
theft alarm* are immediately disabled if you
unlock only the driver door, without unlock-
ing the other doors.
In vehicles with Easy Connect*, you can pro-
gramme the security central locking system
directly ››› page 128.
127
Technical data
Advice
Operation
Emergencies
Safety

Operation
Adjusting the central locking You can use Easy Connect* to select which
doors
ar
e unlocked with the central locking
system. Using the radio or the Easy Connect*
system, you can select whether the vehicle
automatically closes with the “Auto Lock”
programme at speeds of more than 15 km/h
(9 mph).
Programming the unlocking of the doors (ve-
hicles with Easy Connect)
– Select:  button > SETTINGS
fu
nction
b

utton > Opening and closing > Cen-
tral locking > Unlocking doors .
Programming the Auto Lock (vehicles with
Easy Connect)
– Select:  button > SETTINGS
fu
nction
b

utton > Opening and closing > Cen-
tral locking > Locking while
driving .
Programming the Auto Lock (vehicles with
radio)
– Select: SETUP button > control button

Central locking > Locking while
driving .
Un loc
k

ing doors
You can choose to unlock all the doors or
only the driver door when you unlock the vehicle. In all
the options, the fuel
tank flap
is also unlocked.
With the Driver setting, when you press the
 button on the remote control key once, on-
ly the driver door is unlocked. If that button is
pressed twice, the rest of the doors and the
rear lid will be unlocked.
In vehicles with a conventional key, turn the
key in the door lock, in the direction of open-
ing, twice within 2 seconds.
If the  button is pressed, all the vehicle
doors are locked. At the same time, a confir-
mation signal* is heard.
Auto Lock while driving
If you select on, all the vehicle doors are
locked at speeds above 15 km/h (9 mph).
Central locking switch Read the additional information carefully
› ›
›

 page 15
Please note the following when using the
central locking switch to lock your vehicle:
● It is not possible to open the doors or the
rear lid fr
om the outside (for safety reasons,
e.g. when stopped at traffic lights).
● The LED in the central locking switch lights
up when all the door
s are closed and locked. ●
You can open the door
s individually from
the inside by pulling the inside door handle.
● In the event of an accident in which the air-
bags
inflate, doors locked from the inside will
be automatically unlocked to facilitate access
and assistance. WARNING
● The centr a

l locking switch also operates
when the ignition is switched off and auto-
matically locks all the vehicle doors when the
 button is pressed.
● The central locking switch does not operate
if the v
ehicle is locked from the outside and
the anti-theft security system is switched on.
● Locked doors could delay assistance in an
emergency
, potentially putting lives at risk.
Do not leave anyone, especially children, in
the vehicle. Note
Your vehicle will lock automatically when it
re ac

hes a speed of about 15 km/h (9 mph)
(Auto Lock) ››› page 125. You can unlock the
vehicle again using the  button on the cen-
tral locking switch. 128

Operation
Unlocking the vehicle is confirmed with a
doub le
fl
ash of the indicator lights; locking
by a single flash.
If the vehicle is locked and then all doors and
the rear lid are closed leaving the last key
used inside the vehicle and none outside,
the vehicle will not lock immediately. All the
vehicle's indicator lights will flash four times.
The vehicle will lock after a few seconds if
you do not open any door or the rear lid.
The vehicle will lock again after a few sec-
onds if you unlock the vehicle but fail to open
any door or boot hatch.
Unlocking and opening the doors (Keyless-
Entry)
● Grip one of the front door handles. In doing
this, the sensor s
urface ››› Fig. 136 A (arrow)
on the h andl
e i
s touched and the vehicle un-
locks.
● Open the door.
On vehic
les with selective opening or info-
tainment system configuration, pulling the
door handle twice will unlock all doors.
On vehicles without a “Safe” security sys-
tem: shutting and locking doors (Keyless-Ex-
it)
● Switch the ignition off.
● Close the driver's door. ●
Touch (
once) the locking sensor surface B (arrow) on one of the front door handles. The
door th
at
i
s used must be closed.
On vehicles with a “Safe” security system:
shutting and locking doors (Keyless-Exit)
● Switch the ignition off.
● Close the driver's door.
● Touch (once) the sensor surface B (arrow)
on one of the fr
ont

door handles. The vehicle
locks with the “Safe” ››› page 131 system.
The door that is used must be closed.
● Touch (twice) the sensor surface B (arrow)
of one of
the fr

ont door handles to lock the
vehicle without activating the “Safe” security
system ››› page 131.
Unlocking and locking the boot hatch
When the vehicle is locked, the rear lid auto-
matically unlocks on opening if there is a val-
id vehicle key in the proximity ››› Fig. 135.
Open or close the rear lid normally.
After closing, the hatch locks automatically. If
the complete vehicle is unlocked, the rear lid
will not lock automatically after closing it.
What happens when locking the vehicle with
a second key
If there is a vehicle key inside the vehicle and
it is locked from the outside with a second
vehicle key, the key inside the vehicle is blocked for engine ignition
›››
page 178. In
order to enable engine ignition, the  button
on the key inside the vehicle needs to be
pressed.
Automatically disabling sensors
If the vehicle is not locked or unlocked for a
long period of time, the proximity sensors on
the passenger doors are automatically disa-
bled.
If one of the sensor surfaces on the door han-
dles is often activated in an unusual manner
with the vehicle locked (e.g. by the branches
of a bush rubbing against it), all proximity
sensors are disabled for a certain period of
time.
Sensors will again be enabled:
● After a time.
● OR: if the vehicle is unlocked with the 
butt
on on the key.
● OR: if the boot is opened.
● OR: if

the vehicle is unlocked manually with
the key
.
Keyless Access temporary disconnection
function*
You can deactivate the vehicle's Keyless Ac-
cess unlocking for a locking and unlocking
cycle.
130