2017 Seat Leon 5D run flat

The essentials
Repairing a tyre with the anti-punc-
t ur
e k
it Fig. 69
Standard representation: contents of
the anti-p u
nct

ure kit. The anti-puncture kit is located under the
floor p
anel
in the lug

gage compartment.
Sealing the tyre
● Unscrew the tyre valve cap and insert. Use
the ›››

Fig. 69 1 tool to remove the insert.
Pl ac
e it
on a clean surface.
● Shake the tyre sealant bottle vigorously
›››
Fig. 69 10 .
● Screw the inflator tube ››
›
Fig. 69 3 into
the se al
ant
bottle. The bottle's seal will break
automatically. ●
Remov
e the lid from the filling tube
››› Fig. 69 3 and screw the open end of the
t ube int
o the ty
re valve.
● With the tyre sealant bottle upside down,
fill
the tyre with the contents of the sealant
bottle.
● Remove the bottle from the valve.
● Place the insert back into the tyre valve us-
ing the too
l ››› Fig. 69 1 .
Infl atin
g the ty
re
● Screw the compressor tyre inflator tube
›››
Fig. 69 5 into the tyre valve.
● Check that the air bleed screw is closed
› ›
›

Fig. 69 7 .
● Start the engine and leave it running.
● Insert the connector ››
›
Fig. 69 9 into the
v ehic
l
e's 12-volt socket ›››
 page 159.
● Turn the air compressor on with the ON/OFF
switc
h ››› Fig. 69 8 .
● Keep the air compressor running until it
r e
ac

hes 2.0 to 2.5 bar
(29-36 psi/200-250 kPa). A maximum of 8
minutes.
● Disconnect the air compressor.
● If it does not reach the pressure indicated,
uns
crew the tyre inflator tube from the valve.
● Move the vehicle 10m so that the sealant is
dis trib

uted throughout the tyre. ●
Scr ew the c

ompressor tyre inflator into the
valve.
● Repeat the inflation process.
● If the indicated pressure still cannot be
reac
hed, the tyre is too badly damaged. Stop
and request assistance from an authorised
technician.
● Disconnect the air compressor. Unscrew
the tyre infl
ator tube from the tyre valve.
● When the tyre pressure is between 2.5 and
2.0 bars, c
ontinue driving without exceeding
80 km/h (50 mph).
● Check the pressure again after 10 minutes
›››
 page 97.

››› in TMS (Tyre Mobility System)* on
page 95
››› page 95 65

The essentials
Jump leads must comply with standard DIN
72553 (see c ab
l
e manufacturer's instruc-
tions). The wire cross section must be at least
25 mm 2
for petrol engines and at least
35 mm 2
for diesel engines. Note
● The v ehic

les must not touch each other,
otherwise electricity could flow as soon as
the positive terminals are connected.
● The discharged battery must be properly
connected t
o the on-board network. How to jump start: description
Fig. 79
Diagram of connections for vehicles
w ithout


Start Stop system Fig. 80
Diagram of connections for vehicles
with St

art Stop system Jump lead terminal connections
Swit
c

h off the ignition of both vehicles
››› .
C onnect
one end of

the red jump lead to
the positive + terminal of the vehicle
w ith the fl
at

battery A
› ›
› Fig. 79 .
Connect the other end of the red jump
lead to the positive terminal + in the
v ehic
l

e providing assistance B .
F or

vehicles without Start-Stop system:
connect one end of the black jump lead
to the negative terminal – of the vehi-
c l
e pr

oviding the current B
› ›
› Fig. 79 .
For vehicles with Start-Stop system: con-
nect one end of the black jump lead X to a suitable ground terminal, to a solid
piec
e of
met

al in the engine block, or to
the engine block itself ››› Fig. 80.
1.
2.
3.
4a.
4b. Connect the other end of the
black
jump
lead X to a solid metal component bol-
t ed t
o the en
gine block or to the engine
block itself of the vehicle with the flat
battery. Do not connect it to a point near
the battery A .
P o
s

ition the leads in such a way that
they cannot come into contact with any
moving parts in the engine compart-
ment.
Starting Start the engine of the vehicle with the
boosting battery and let it run at idling
speed.
Start the engine of the vehicle with the
flat battery and wait for 2 or 3 minutes
until the engine is running.
Removing the jump leads Before you remove the jump leads,
switch off the dipped beam headlights if
they are switched on.
Turn on the heater blower and heated
rear window in the vehicle with the flat
battery. This helps minimise voltage
peaks which are generated when the
leads are disconnected.
When the engine is running, disconnect
the leads in reverse order to the details
given above. »
5.
6.
7.
8.
9.
10.
11.
71

Operation
● When the v
ehic
le is transported on a ferry
or by rail (vehicles with an anti-tow system or
vehicle interior monitoring ››› page 135).
● When a trailer connected to the anti-theft
alarm sys
tem is disconnected.
How to turn OFF the alarm
Unlock the vehicle with the unlocking button
on the key or turn on the ignition with a valid
key. Note
● Aft er 28 d

ays, the indicator light will be
switched off to prevent the battery from ex-
hausting if the vehicle has been left parked
for a long period of time. The alarm system
remains activated.
● If, after the audible warning goes off, an-
other monitored ar
ea is accessed (e.g. the
rear lid is opened after a door has been
opened), the alarm is triggered again.
● The anti-theft alarm is not activated when
the vehic
le is locked from within 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 ignition has been turned on will the
other doors be available - but not unlocked -
and the central locking button will be activa-
ted. ●
If the v

ehicle battery is run down or flat
then the anti-theft alarm will not operate cor-
rectly.
● Vehicle monitoring remains active even if
the batter
y is disconnected or not working for
any reason.
● The alarm is triggered immediately if one of
the batter
y cables is disconnected while the
alarm system is active. Vehicle interior monitoring and anti-
to
w sy

stem* It is a monitoring or control function incorpo-
r
at
ed in the anti-thef

t alarm* which detects
unauthorised vehicle entry by means of ultra-
sound.
Activation
– It is automatically switched on when the
anti-theft al

arm is activated.
Deactivation – Open the vehicle with the key, either me-
chanic

ally or by pressing the  button on
the remote control. The time period from
when the door is opened until the key is in-
serted in the contact should not exceed 15
seconds, otherwise the alarm will be trig-
gered. –
Pres
s the  button on the remote control
twice. The volumetric sensor and tilt sen-
sors will be deactivated. The alarm system
remains activated.
The vehicle interior monitoring and the anti-
tow system are automatically switched on
again next time the vehicle is locked.
The vehicle interior monitoring and anti-tow
sensor (tilt sensor) are automatically switch-
ed 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 system, 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
Interior monitoring will only operate correctly
if the vehicle is completely closed. Please ob-
serve related legal requirements.
The following cases may cause a false alarm:
● Open windows (partially or fully).
134

Transport and practical equipment
●
Use s uit
able straps to secure heavy ob-
jects.
● During sudden manoeuvres or accidents,
loose ob
jects can be thrown forward, injuring
vehicle occupants or passers-by. This in-
creased risk of injury will be further increased
if a loose object is struck by an inflating air-
bag. If this happens, objects may shoot out-
ward like a missile. Risk of fatal injury.
● Please note that the centre of gravity may
shift when tr
ansporting heavy objects; this
may affect vehicle handling and lead to an ac-
cident. Therefore, it is essential to adjust
your speed and driving style accordingly, to
avoid accidents.
● Never exceed the allowed axle weights or
allo
wed maximum weight. If said weights are
exceeded, the driving characteristics of the
vehicle may change, leading to accidents, in-
juries and damage to the vehicle.
● Never leave your vehicle unattended, espe-
cia
lly when the rear lid is open. Children
could climb into the luggage compartment,
closing the door behind them; they will be
trapped and run the risk of death.
● Never allow children to play in or around
the vehic
le. Close and lock all the doors and
the rear lid when you leave the vehicle. Be-
fore you lock the vehicle, make sure that
there are no adults or children in the vehicle. Note
● Air cir c

ulation in the vehicle helps reduce
fogging of the windows. Used air escapes
through ventilation slits in the side trim of
the luggage compartment. Ensure that the
ventilation slots are never covered.
● Straps for securing the load to the fasten-
ing ring
s are commercially available. Luggage compartment shelf
3 App
lies to the model: LEON/LEON SC Fig. 163
In the luggage compartment: remov-
in g and in
s

talling the rear shelf. Fig. 164
In the luggage compartment: remov-
ing and in s

talling the rear shelf. The luggage compartment cover blocks the
v
iew int
o the lug

gage compartment.
Removing ● Detach the cord loops ›››
Fig. 163 B from
their hook s
A .
● Remove the rear shelf from the side sup-
por ts
›

›› Fig. 164 by pulling it upwards and
then take it out.
● If necessary, the rear shelf can be stored
under the lugg
age compartment variable
floor ››› page 163
Fitting
● Insert the cover horizontally so that the “re-
ces
s” fits onto the axis of the supports
››› Fig. 164 and press down until it engages.
● Hook the loops ›››
Fig. 163 B to the rear lid
› ›
›
.
»
161
Technical data
Advice
Operation
Emergencies
Safety

Operation
fastened, an y
of the following situations take
place:
● On vehicles with an automatic gearbox: A
gear r
ange is engaged or the vehicle is
switched to another one and the accelerator
pedal is lightly pressed.
● In vehicles with a manual gearbox: The
clutc
h pedal is pressed fully before starting
off and the accelerator is pedal lightly press-
ed.
● To facilitate certain manoeuvres there are
exc
eptions that allow the automatic parking
brake to be released without the driver's seat
belt being fastened.
The parking brake can be prevented from be-
ing automatically released by continuously
pulling up the  ››› Fig. 195 switch when
starting off.
The electronic parking brake is not discon-
nected until the  button is released. This
can facilitate starting off when a heavy load
is towed ››› page 246.
Automatic activation of the electronic park-
ing brake when exiting the vehicle incorrect-
ly
In vehicles with automatic transmission, the
electronic parking brake is activated auto-
matically when exiting the vehicle incorrectly
if: ●
The selector l
ever is in the D/S or R posi-
tion or in the Tiptronic selector gate.
● AND: the vehicle is stationary.
● AND: the driv

er door is
open.
Emergency braking function
Only use the emergency brake function if you
are unable to stop the vehicle with the foot
brake ››› .
● Pull and hold the  › ›
›
Fig. 195 button in
this position to forcefully stop the vehicle. At
the same time, an acoustic warning can be
heard.
● To stop the braking process, release the
button or pr
ess the accelerator. WARNING
The improper use of the electronic parking
brak e c

an cause accidents and serious injury.
● Never use the electronic parking brake to
stop the
vehicle, unless it is an emergency.
The braking distance may be considerably
longer. Always use the foot brake.
● Never accelerate from the engine when a
gear r
ange or a gear is engaged and the en-
gine is running. The vehicle could move, even
if the electronic parking brake is activated. CAUTION
To prevent the vehicle from unintentionally
mov in

g when parking it, first apply the elec- tronic parking brake and then remove your
foot
fr

om the brake pedal. Note
● In vehic

les with a manual gearbox, releas-
ing the clutch and accelerating at the same
time automatically disconnects the electronic
parking brake.
● If the vehicle battery is flat, it will not be
poss
ible to disconnect the electronic parking
brake. Use the jump-start ›››
 page 70.
● When the electronic parking brake is ap-
plied or rel
eased, noises may be heard.
● The system performs automatic and audi-
ble t
ests sporadically in the parked vehicle if
some time elapses without the electronic
parking brake being used. Using the handbrake
Fig. 196
Handbrake between the front seats.184

Operation
Note
● Neither is the po
wer management system
able to overcome the given physical limits.
Please remember that the power and useful
life of the battery are limited.
● When there is a risk that the vehicle will
not st
art, the alternator power failure or low
battery charge level warning lamp will be
shown  ››› page 119. Flat battery
Starting ability has first priority.
Shor
t
trip

s, city traffic and low temperatures
all place a heavy load on the battery. In these
conditions a large amount of power is con-
sumed, but only a small amount is supplied.
The situation is also critical if electrical devi-
ces are in use when the engine is not run-
ning. In this case power is consumed when
none is being generated.
In these situations you will be aware that the
power management system is intervening to
control the distribution of electrical power.
When the vehicle is parked for long periods
If you do not drive your vehicle for a period of
several days or weeks, the power manage-
ment will gradually shut off the electrical de-
vices one by one or reduce the amount of cur-
rent they are using. This limits the amount of power consumed and helps to ensure relia-
ble s

tarting even after a long period. Some
convenience functions, such as remote vehi-
cle opening, may not be available under cer-
tain circumstances. These functions will be
restored when you switch on the ignition and
start the engine.
With the engine switched off
For example, if you listen to the sound sys-
tem with the engine switched off the battery
will run down.
If the energy consumption means there is a
risk that the engine will not start, a text will
appear in vehicles with a driver information
system*.
This driver indicator tells you that you must
start the engine so that the battery can re-
charge.
When the engine is running
Although the alternator generates electrical
power, the battery can still become dis-
charged while the vehicle is being driven.
This can occur when a lot of power is being
consumed but only a small amount supplied,
especially if the battery is not fully charged
initially.
To restore the necessary energy balance, the
system will then temporarily shut off the elec-
trical devices that are using a lot of power, or
reduce the current they are consuming. Heat- ing systems in particular use a large amount
of electric
al power. If you notice, for instance,
that the seat heating* or the rear window
heater is not working, they may have been
temporarily switched off or regulated to a
lower heat output. These systems will be
available again as soon as sufficient electri-
cal power is available.
You may also notice that the engine runs at a
slightly faster idling speed when necessary.
This is quite normal, and no cause for con-
cern. The increased idling speed allows the
alternator to meet the greater power require-
ment and charge the battery at the same
time.
Engine management and emis-
sion contr
ol system
Introduction WARNING
● Bec au

se of the high temperatures which
can occur in the exhaust purification system
(catalytic converter or diesel particulate fil-
ter), do not park the vehicle where the ex-
haust can come into contact with flammable
materials under the car (e.g. on grass or at
the forest edge). Fire hazard! 202

Operation
Auto Hold Function* D e
s
cription and operation Fig. 202
In the lower part of the centre con-
so l
e: Aut

o Hold function button. The control light of the 
› ›
›
Fig. 202 button
remains on when the Auto Hold function is
connected.
Once connected, the Auto Hold function as-
sists the driver in keeping the vehicle station-
ary at repeated intervals or for a certain peri-
od of time with the engine running, for exam-
ple, when going up a slope, when stopped at
traffic lights or in heavy traffic with intermit-
tent stops.
When connected, the Auto Hold function au-
tomatically prevents the vehicle from rolling
when stationary without pressing the brake
pedal. After detecting that the vehicle is stationary
and the brake ped

al has been released, the
Auto Hold function holds the vehicle. The
driver can lift their foot off the brake pedal.
When the driver touches the accelerator ped-
al or accelerates slightly to continue driving,
the Auto Hold function releases the brake.
The vehicle moves according to the slope of
the road.
If the vehicle is stationary and one of the con-
ditions required by the Auto Hold function is
impaired, it disconnects itself and the but-
ton's control light goes out ››› Fig. 202. The
electronic parking brake connects automati-
cally, if necessary, to park the vehicle safe-
ly ››› .
C ondition
s

for keeping the vehicle stationary
with the Auto Hold function
● The driver door must be closed.
● The driver's seat belt must be fastened.
● The engine is running.
Switc
hing the Auto Hold function on and off
Press the button  ››› . The control lamp on
the b utt
on g

oes out when the Auto Hold func-
tion is switched off. Automatically engaging and disengaging the
Auto Hol

d function
If the Auto Hold function was switched on
with the  button before disengaging the ig-
nition, the function will remain on after the
ignition is re-engaged.
If the Auto Hold function was not switched
on, it will automatically remain off next time
the ignition is engaged.
The Auto Hold function is automatically
switched on if the following conditions are
met:
All conditions must be met at the same time
››› :
Manual gearboxAutomatic gearbox
1.The vehicle is kept stationary with the brake ped-
al on a flat surface or on a slope.
2.The engine rotates “correctly”.
Upon pressing the
clutch and accelerating
at the same time, the
brake releases gradu-
ally.Upon accelerating, the
brake releases gradu-
ally. 208

Checking and refilling levels
CAUTION
● Do not mi x
cleaning products recommen-
ded by SEAT with other products. This could
lead to flocculation and may block the wind-
screen washer jets.
● When topping up service fluids, make abso-
lutely c
ertain that you fill the fluids into the
correct reservoirs. Using the wrong fluids
could cause serious malfunctions and engine
damage!
● Not having windscreen wiper fluid reduces
vis
ibility through the windscreen, and leads
to loss of visibility in headlights in models
with headlight washer. Battery
Gener a
l

informationRead the additional information carefully
› ›
›

 page 61.
The battery is located in the engine compart-
ment and is almost maintenance-free. It is
checked as part of the Inspection Service.
Nevertheless, check the terminals are clean
and have the correct tightening torque, espe-
cially in summer and winter.
Disconnecting the battery
The battery should only be disconnected in
exceptional cases. When the battery is dis- connected, some of the vehicle's functions
are “los

t” (››› table on page 277). These
functions will require resetting after the bat-
tery is reconnected.
Deactivate the anti-theft alarm* before you
disconnect the battery Otherwise the alarm
will be triggered.
FunctionReprogramming
One-touch function of
the electric windows››› page 138, One-touch
opening and closing*.
Remote control key
If the vehicle does not re-
spond to the key, they
should be synchronised
››› page 132.
Digital clock››› page 116.
ESC warning lampAfter driving for a few me-
tres, the warning lamp goes
out again. If the vehicle is not used for long periods
The
v
ehic

le has a system for monitoring the
current consumption when the engine is left
unused for long periods of time ››› page 201.
Some functions, such as the interior lights, or
the remote door opening, may be temporarily
disabled to prevent the battery from running
flat. These functions will come back on as
soon as the ignition is switched on and the
engine started. Winter conditions
During the w

inter, the starting power may be
reduced, and if necessary, the battery should
be charged ››› in Important safety warn-
in g
s

for handling a vehicle battery on
page 278
Important safety warnings for han-
dling a v
ehicle battery All work on batteries requires specialist
kno
wl
edg

e. Please refer to a SEAT Official
Service or a workshop specialising in batter-
ies: risk of burns or exploding battery!
The battery must not be opened. Never try to
change the fluid level of the battery. Other-
wise explosive gas is released from the bat-
tery that could cause an explosion. 
Wear eye protection.

Battery acid is very corrosive and caustic. Wear
protective gloves and eye protection. In the event
of electrolyte splashes, rinse off with plenty of
water.

Fires, sparks, open flames and smoking are pro-
hibited.

The battery should only be charged in a well-ven-
tilated zone. Risk of explosion!

Keep children away from acid and batteries!»
277
Technical data
Advice
Operation
Emergencies
Safety