Seat Leon. Service Manual - part 6

Self-help

CAUTION

Switch off the air compressor after a maxi-
mum of 8 operational minutes to avoid over-
heating! Before switching on the air compres-
sor again, let it cool for several minutes.

Check after 10 minutes of driving

Screw the inflator tube 

››› 

Fig. 96 

5

 again

and check the pressure on the gauge 

6

.

1.3 bar (19 psi / 130 kPa) and lower:

●

Stop the vehicle! The tyre cannot be sealed

sufficiently with the tyre mobility set.

●

You should obtain professional assistance

››› 

.

1.4 bar (20 psi / 140 kPa) and higher:

●

Set the tyre pressure to the correct value

again.

●

Carefully resume your journey until you

reach the nearest specialised workshop with-
out exceeding 80 km/h (50 mph).

●

Have the damaged tyre replaced.

WARNING

Driving with an unsealed tyre is dangerous
and can cause accidents and serious injury.

●

Do not continue driving if the tyre pressure

is 1.3 bar (19 psi / 130 kPa) and lower.

●

Seek specialist assistance.

Manual unlocking/locking

Introduction

Read the additional information carefully

››› 



page 11

, 

››› 



page 12

.

The doors, rear lid and panoramic tilting sun-
roof can be locked manually and partially
opened, for example if the key or the central
locking is damaged.

WARNING

Opening and closing doors carelessly can
cause serious injury.

●

If the vehicle is locked from outside, the

doors and windows cannot be opened from
the inside.

●

Never leave children or disabled people

alone in the car. They could be trapped in the
car in an emergency and will not be able to
get themselves to safety.

●

Depending on the time of the year, temper-

atures inside a locked and closed vehicle can
be extremely high or extremely low resulting
in serious injuries and illness or even death,
particularly for young children.

WARNING

Getting in the way of the doors and the rear
lid is dangerous and can lead to serious in-
jury.

●

Open and close the doors and the rear lid

only when there is nobody in the way.

CAUTION

When opening and closing in an emergency,
carefully disassemble components and then
reassemble them carefully to avoid damage
to the vehicle.

Changing the windscreen wiper
blades

Changing the windscreen and rear
window wiper blades

Read the additional information carefully

››› 



page 64

.

The windscreen wiper blades are supplied as
standard with a layer of graphite. This layer is
responsible for ensuring that the wipe is si-
lent. If the graphite layer is damaged, the
noise of the water as it is wiped across the
windscreen will be louder.

Check the condition of the wiper blades regu-
larly. 

If the wipers scrape across the glass,

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they should be changed if they are damaged,
or cleaned if they are dirty 

››› 

.

Damaged wiper blades should be replaced
immediately. These are available from quali-
fied workshops.

WARNING

Worn or dirty wiper blades reduce visibility
and increase the risk of accident and serious
injury.

●

Always replace damaged or worn blades or

blades which do not clean the windscreen
correctly.

CAUTION

●

Damaged or dirty windscreen wipers could

scratch the glass.

●

If products containing solvents, rough

sponges or sharp objects are used to clean
the blades, the graphite layer will be dam-
aged.

●

Never use fuel, nail varnish remover, paint

thinner or similar products to clean the win-
dows.

●

In icy conditions, always check that the

wiper blades are not frozen to the glass be-
fore using the wipers. In cold weather, it may
help to leave the vehicle parked with the wip-
ers in service position 

››› 



page 63

.

CAUTION

●

To prevent damage to the bonnet and the

wiper arms, only leave them in the service
position.

●

Before driving, always lower the wiper

arms.

Towing and tow-starting the ve-
hicle

General information

Read the additional information carefully

››› 



page 60

.

Tow-starting means starting the engine of
the vehicle while another pulls it.

Towing means one vehicle pulling another
that is not roadworthy.

If the vehicle comes with the Keyless Access
system, towing is only allowed with the igni-
tion on!

The vehicle battery drains if the vehicle is
towed with the engine switched off and the
ignition connected. Depending on the battery
charge status, the drop in voltage may be so
large, even after just a few minutes, that no
electrical device in the vehicle may work e.g.
the hazard warning lights. In vehicles with

the Keyless Access system, the steering
wheel could lock up.

WARNING

If the vehicle has no electrical power, the
brake lights, turn signals and all other lights
will no longer function. Do not have the vehi-
cle towed away. Failure to follow this instruc-
tion could result in an accident.

WARNING

The risk of accidents is high when tow-start-
ing, for example, the towed vehicle can easily
be driven into the towing vehicle.

CAUTION

If there is no oil in the gearbox or no lubricant
in the automatic transmission the car may
only be towed with the driven wheels lifted
clear of the road, or transported on a special
car transporter or trailer.

CAUTION

Do not tow a vehicle for more than 50 m in at-
tempt to start it. There is risk of damage to
the catalytic converter.

Note

●

Please observe related legal requirements.

88

Self-help

●

Switch on the hazard warning lights of both

vehicles. However, observe any regulations
to the contrary.

●

The tow rope must not be twisted. Other-

wise the front tow line anchorage could be
pulled off the vehicle.

Indications for tow-starting

Vehicle's should not generally be tow-star-
ted. The jump start should be used instead

››› 



page 61

.

For technical reasons, towing the following
vehicles is 

not allowed:

●

Vehicles with an automatic gearbox.

●

If the vehicle battery is discharged, be-

cause in vehicles with the Keyless Access
locking and ignition system the steering re-
mains locked and the electronic parking
brake cannot be deactivated nor can the elec-
tronic lock of the steering column be re-
leased if they are activated.

●

If the battery is flat, it is possible that the

engine control units may not operate correct-
ly.

However, if the vehicle must absolutely be
tow-started (in the case of manual gearbox-
es):

●

Engage the 2nd or 3rd gear.

●

Keep the clutch pressed down.

●

Switch on the ignition and the hazard warn-

ing lights.

●

Once both vehicles are moving, release the

clutch.

●

Once the engine starts, press the clutch

and disengage the gear to avoid colliding
with the towing vehicle.

Note

The vehicle can only be tow-started if the
electronic parking brake and, if appropriate,
the electronic lock of the steering column are
deactivated. If the vehicle has no power sup-
ply or there is an electric system fault, the
engine must be tow-started to deactivate the
electronic parking brake and the electronic
lock of the steering column.

Anchoring the front tow line

Fig. 97 

Right side of the front bumper: tow-

line anchorage screwed in.

The front towline anchorage is only mounted
if the vehicle has to be towed.

There is a cover with an opening into which
the towline anchorage is screwed on the right
part of the front bumper.

–

To open the cover press it on its left-hand
side.

–

Take the towline anchorage out of the vehi-
cle tool kit 

››› 

page 85

.

–

Screw the towline anchorage into the screw
connection as far as it will go 

››› 

Fig. 97

 and

tighten with the wheel brace.

After use, unscrew the towline anchorage
and fit the cover back on the bumper. Put the
towline anchorage back in the vehicle tool

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kit. The towline anchorage should always be
kept in the vehicle.

Rear towline anchorage

Fig. 98 

Right side of the rear bumper: cover-

cap.

Fig. 99 

Right side of the rear bumper: towline

anchorage screwed in.

The rear towline anchorage should only be
mounted if you wish to tow another vehicle.

Vehicles with towline anchorage
On the right of the rear bumper there is a cov-
er which covers a threaded hole.

–

Take the towline anchorage out of the vehi-
cle tool set 

››› 

page 85

.

–

To open the cover press it on the top right
area 

››› 

Fig. 98

–

Screw the towline anchorage into the screw
connection as far as it will go 

››› 

Fig. 99

 and

tighten with the wheel brace.

After use, unscrew the towline anchorage
and put it back in the vehicle tool kit. Replace
the cover on the bumper. The towline anchor-
age should always be kept in the vehicle.

WARNING

●

If the towline anchorage is not screwed in

as far as the stop, there is a risk of the screw
connection shearing off during towing (acci-
dent risk).

●

If your car has a towing bracket, only use

special towing ropes. Risk of accident!

CAUTION

In vehicles fitted with a towing bracket, only
use special tow bars to prevent damage to
the ball joint. These tow bars have been spe-
cially approved for use with towing brackets.

Towing vehicles with a manual gear-
box

Towing is relatively straightforward.

Please observe the relevant instructions

››› 

page 88

.

The vehicle can be towed using a tow bar or
tow rope in the normal way, with all four
wheels on the road; it can also be towed with
either the front or rear wheels lifted off the
road. The maximum towing speed is 

50 km/h

(30 mph).

Towing a vehicle equipped with auto-
matic gearbox

Certain restrictions must be observed when
towing your vehicle.

Please observe the relevant instructions

››› 

page 88

.

The vehicle can be towed with a tow bar or
tow rope in the normal way, with all four
wheels on the ground. When doing so,
please note the following points:

●

Make sure the 

selector lever is in the N po-

sition.

●

The vehicle must not be towed faster than

50 km/h (30 mph).

●

The vehicle must not be towed further than

50 km (30 miles). Reason: when the engine

90

Fuses and bulbs

is not running, the gearbox oil pump does
not work and the gearbox is not adequately
lubricated for higher speeds or longer distan-
ces.

If the vehicle has to be towed with a 

break-

down truck, it must only be suspended at the
front wheels. Reason: the drive shafts are lo-
cated on the front wheels. If the car is towed
with the rear wheels lifted off the road (I.e.
travelling backwards), the drive shafts also
turn backwards. The planetary gears in the
automatic gearbox then turn at such high
speeds that the gearbox will be severely
damaged in a short time.

Note

●

If it is not possible to tow the vehicle in the

normal way, or if it has to be towed further
than 50 km (30 miles), it must be transported
on a special car transporter or trailer.

●

Should the power supply to the selector

lever be interrupted in position P, the selector
lever will be locked. Before the vehicle can be
recovered/manoeuvred you must manually
release the selector lever 

››› 



page 43

.

Fuses and bulbs

Fuses

Introduction

In general, a fuse can be assigned to various
electrical components. Likewise, an electrical
component can be protected by several
fuses.

Only replace fuses when the cause of the
problem has been solved. If a newly inserted
fuse blows after a short time, you must have
the electrical system checked by a special-
ised workshop as soon as possible.

WARNING

The high voltages in the electrical system can
give serious electrical shocks, causing burns
and even death!

●

Never touch the electrical wiring of the igni-

tion system.

●

Take care not to cause short circuits in the

electrical system.

WARNING

Using unsuitable fuses, repairing fuses or
bridging a current circuit without fuses can
cause a fire and serious injury.

●

Never use a fuse with a higher value. Only

replace fuses with a fuse of the same amper-
age (same colour and markings) and size.

●

Never repair a fuse.

●

Never replace a fuse by a metal strip, staple

or similar.

CAUTION

●

To prevent damage to the vehicle's electric

system, before replacing a fuse always turn
off the ignition, the lights and all electrical
elements and remove the key from the igni-
tion.

●

If you replace a fuse with higher-rating

fuse, you could cause damage to another part
of the electrical system.

●

Protect the fuse boxes when open to pre-

vent the entry of dust or humidity as they can
damage the electrical system.

Note

●

One component may have more than one

fuse.

●

Several components may run on a single

fuse.

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Vehicle fuses

Fig. 100 

On the driver-side dash panel: fuse

box cover

Fig. 101 

In the engine compartment: fuse box

cover

Read the additional information carefully

››› 



page 54

Only replace fuses with a fuse of the same
amperage (same colour and markings) and
size.

Opening and closing the fuse box situated
below the dash panel

●

Opening: fold the cover down 

››› 

Fig. 100

.

●

Closing: push back the cover it in until it

clicks into place.

To open the engine compartment fuse box

●

Open the bonnet 



 

››› 

page 262

.

●

Press the locking tabs to release the fuse

box cover 

››› 

Fig. 101

.

●

Then lift the cover out.

●

To 

fit the cover, place it on the fuse box.

Push the locking tabs down until they click
audibly into place.

Fuses in the vehicle interior

No.

Consumers/Amps

4

Taxis

3

5

Gateway

5

6

Automatic gearbox lever

5

7

Air conditioning and heating control
panel, heating the back window.

10

8

Diagnosis, handbrake switch, light
switch, reverse light, interior lighting

10

9

Steering column

5

10

Radio display

5

12

Radio

20

No.

Consumers/Amps

13

Driving mode.

15

14

Air conditioner fan

40

15

KESSY

10

16

Connectivity Box

7.5

17

Instrument panel

5

18

Rear camera

7.5

19

KESSY

7.5

21

4x4 Haldex Control Unit

15

22

Trailer

15

23

Right lights

40

24

Electric sunroof

30

25

Left door

30

26

Heated seats

20

28

Trailer

25

31

Left lights

40

32

Control unit for parking aid, front cam-
era and radar

7.5

33

Airbag

5

34

Reverse switch, clima sensor, electro-
chromic mirror

7.5

35

Diagnosis, headlight control unit,
headlight adjuster

10

92

Fuses and bulbs

No.

Consumers/Amps

36

Right LED headlight

10

37

Left LED headlight

10

38

Trailer

25

39

Right door

30

40

12V socket

20

42

Central locking

40

43

Interior light

30

44

Trailer

15

45

Electric driver's seat

15

47

Rear window wiper

15

49

Starter motor; clutch sensor

5

53

Heated rear window

30

Fuse arrangement in engine compartment

No.

Consumers/Amps

1

ESP control unit

40/20

2

ESP control unit

40/60

3

Engine control unit (diesel/pet-
rol)

30/15

4

Engine sensors

5/10

5

Engine sensors

7.5/10

6

Brake light sensor

5

No.

Consumers/Amps

7

Engine power supply

5/10

8

Lambda probe

10/15

9

Engine

5/10/20

10

Fuel pump control unit

10/15/20

11

PTC

40

12

PTC

40

13

Automatic gearbox control unit

15/30

15

Horn

15

16

Fuel pump control unit

5/15/20

17

Engine control unit

7.5

18

Terminal 30 (positive reference)

5

19

Front windscreen washer

30

20

Alarm horn

10

22

Engine control unit

5

23

Starter motor

30

24

PTC

40

31

Electronic differential CUPRA

15

33

Automatic gearbox pump

30

CAUTION

●

Always carefully remove the fuse box cov-

ers and refit them correctly to avoid problems
with your vehicle.

●

Protect the fuse boxes when open to avoid

the entry of dust or humidity. Dirt and humid-
ity inside fuse boxes can cause damage to
the electrical system.

Note

●

In the vehicle, there are more fuses than

those indicated in this chapter. These should
only be changed by a specialised workshop.

●

Positions not containing a fuse do not ap-

pear in the following tables.

●

Some of the equipment listed in the tables

below pertain only to certain versions of the
model or are optional extras.

●

Please note that the above lists, while cor-

rect at the time of printing, are subject to
change.

Changing bulbs

Topic introduction

Read the additional information carefully

››› 



page 55

.

Changing bulbs requires a certain degree of
practical skill.

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If you choose to change the engine compart-
ment lamps yourself, remember that it is a
dangerous area 

››› 

 in Work in the engine

compartment on page 262

.

Always use identical bulbs with the same
designation. The name can be found on the
base of the bulb holder.

Depending on how equipped the vehicle is,
there are different sets of headlights and tail
lights:

●

Halogen headlights

●

Full-LED main headlights*

●

Halogen headlights with LED daytime run-

ning lights*

●

Rear bulb light

●

LED rear light*

Full-LED headlight system*
Full-LED headlights handle all light functions
(daylight, side light, turn signal, dipped
beam and route light) with light emitting di-
odes (LEDs) as a light source.

Full-LED headlights are designed to last the
lifetime of the car and light bulbs cannot be
replaced. In case of headlight failure, go to
an authorised workshop to have it replaced.

WARNING

●

Take particular care when working on com-

ponents in the engine compartment if the en-
gine is warm. Risk of burns.

●

Bulbs are highly sensitive to pressure. The

glass can break when you touch the bulb,
causing injury.

●

When changing bulbs, please take care not

to injure yourself on sharp edges, in particu-
lar on the headlight housing.

CAUTION

●

Remove the ignition key before working on

the electric system. Otherwise, a short circuit
could occur.

●

Switch off the lights and the parking light

before changing a bulb.

●

Take good care to avoid damaging any com-

ponents.

For the sake of the environment

Please ask your specialist retailer how to dis-
pose of used bulbs in the proper manner.

Note

●

Please check at regular intervals that all

lighting (especially the exterior lighting) on
your vehicle is functioning properly. This is
not only in the interest of your own safety,
but also that of all other road users.

●

Before changing a bulb, make sure you

have the correct new bulb.

●

Do not touch the glass part of the bulb with

your bare hands, use a cloth or paper towel
instead, since the fingerprints left on the
glass will vaporise as a result of the heat gen-
erated by the bulb, they will be deposited on
the reflector and will impair its surface.

94

Fuses and bulbs

Change the front bulbs

Dipped headlight bulb

Fig. 102 

Dipped beam headlights.

Fig. 103 

Dipped beam headlights.

–

Raise the bonnet.

–

Move the loops 

››› 

Fig. 102

 

1

 in the direc-

tion of the arrow and remove the cover.

–

Remove connector 

››› 

Fig. 103

 

2

 from the

bulb.

–

Unclip the retainer spring 

››› 

Fig. 103

 

3

pressing inwards to the right.

–

Extract the bulb and fit the replacement so
that the lug on the base fits into the recess
on the reflector.

Day light bulb

Fig. 104 

Day light bulb.

–

Raise the bonnet.

–

Turn the bulb holder 

››› 

Fig. 104

 

1

 to the

left and pull.

–

Remove the bulb by pressing on the bulb
holder and turning it anti-clockwise at the
same time.

–

Installation involves all of the above steps
in reverse sequence.

Turn signal bulb

Fig. 105 

Turn signal bulb.

Fig. 106 

Turn signal bulb.

–

Raise the bonnet.

–

Move the loop 

››› 

Fig. 105

 

1

 in the direc-

tion of the arrow and remove the cover.

–

Turn the bulb holder 

››› 

Fig. 106

 

2

 anti-

clockwise and pull.

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–

Remove the bulb by pressing on the bulb
holder and turning it anti-clockwise at the
same time.

–

Installation involves all of the above steps
in reverse sequence.

Main beam headlight bulb

Fig. 107 

Main beam headlight bulb.

Fig. 108 

Main beam headlight bulb.

–

Raise the bonnet.

–

Move the loop 

››› 

Fig. 107

 

1

 in the direc-

tion of the arrow and remove the cover.

–

Slide connector 

››› 

Fig. 108

 

2

 to the left or

right and pull.

–

Remove the bulb by disconnecting the con-
nector.

–

Installation involves all of the above steps
in reverse sequence.

Fog light bulb*

3

 Valid only for versions with incandescent bulbs

Fig. 109 

Fog light: extracting the grille.

96

Fuses and bulbs

Fig. 110 

Fog light: remove the bulb holder

Follow the steps indicated:

Remove the screw 

››› 

Fig. 109

 

1

  from

the fog light grille using a screwdriver
and extract the grille.
Remove the 3 screws 

››› 

Fig. 109

 

2

 .

Remove the metal clip situated on the
upper part of the fog light by pulling
away from the vehicle 

3

  and take

the fog light out.
Remove the connector 

››› 

Fig. 110 

1

from the bulb.
Turn the bulb holder 

2

 anti-clockwise

and pull.
Remove the bulb by pressing on the
bulb holder and turning it anticlockwise
at the same time.
Installation involves all of the above
steps in reverse sequence.
Check that the bulb works properly.

1.

2.
3.

4.

5.

6.

7.

8.

Note

●

Due to the difficulty of accessing fog light

bulbs, have them replaced at a Technical
Service or specialised workshop.

●

LED fog light bulbs should be replaced by

specialised personnel.

Changing incandescent rear
light bulbs

Rear lights summary

Tail lights on side panel

Turn signal

PY21W NA LL

Side light and brake light

P21W LL

Tail lights on the rear lid

Left side

Side lights

2x W5W LL

Fog lights

H21 W

Right side

Side lights

2x W5W LL

Reverse light

P21W LL

The table corresponds to a right-hand traffic
vehicle. The position of lights may vary ac-
cording to the country.

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Emergencies

Rear bulbs (in the side panel)

Fig. 111 

Luggage compartment: location of

the bolt securing the tail light unit. Remove
the rear light unit from side panel.

Fig. 112 

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 screwdriver into the recess and remove
the cover from the opening 

››› 

Fig. 111

 

1

.

–

Carefully loosen the screw located behind
the cover with a screwdriver, turning it anti-
clockwise 

››› 

Fig. 111

 

2

.

–

Tilt the light in the direction of the arrows
until it comes out of its housing (positions

3

 and 

4

) 

››› 

Fig. 111

.

–

Remove the bulb holder 

››› 

Fig. 112

 unlock-

ing the retaining tabs 

1

.

–

Change the damaged bulb.

–

To refit follow the steps in reverse order,
taking special care when fitting the bulb
holder. The securing tabs must click into
place.

CAUTION

Take care when removing the rear light unit to
make sure there is no damage to the paint-
work or any of its components.

Note

Make sure you have a soft cloth ready to
place under the glass on the rear light unit, to
avoid any scratches.

98

Fuses and bulbs

Rear lights bulbs (in the rear lid)

Fig. 113 

Remove the cover from the rear lid

and detach the bulb holder.

Fig. 114 

Position of the bulbs in the bulb

holder

The rear lid must be open to change the
bulbs.

–

Remove the rear lid cover in the direction
indicated by the arrow 

››› 

Fig. 113

 .

–

Unlock the retaining tabs 

A

 of the bulb

holder, following the direction of arrows 

1

and 

2

 

››› 

Fig. 113

 .

–

Remove the bulb holder by turning it in the
direction of arrow 

3

 

››› 

Fig. 113

 .

–

Lightly press the defective bulb into the
bulb holder 

1

, then turn it to the left 

2

and remove it 

››› 

Fig. 114

.

–

Fit the new bulb, pressing it into the bulb
holder and turn it to the right as far as it
will go.

–

Use a cloth to remove any fingerprints from
the glass part of the bulb.

–

Check that the new bulb works properly.

–

Reinstall the bulb holder making sure that
locking clips 

A

 

››› 

Fig. 113

  are properly

clipped.

–

Replace the cover of the rear lid lining.

Rear LED light bulb (in the rear lid)

Fig. 115 

Remove the cover from the rear lid

Fig. 116 

Remove the bulb holder.

»

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Emer

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Emergencies

The rear lid must be open to change the
bulbs.

–

Remove the rear lid cover in the direction
indicated 

››› 

Fig. 115

.

–

Turn the bulb holder anti-clockwise in the
direction of the arrow 

1

 

››› 

Fig. 116

.

–

Remove the bulb holder from its housing

2

.

–

Replace the defective bulb and return the
bulb holder to its housing, following the
same steps in reverse order.

–

Check that the new bulb works properly.

Changing number plate light bulbs

Fig. 117 

In the rear bumper: number plate

light.

Fig. 118 

Number plate light: Remove the bulb

holder.

Follow the steps indicated:

1. Press the number plate light in the direc-

tion of the arrow 

››› 

Fig. 117

.

2. Remove the number plate bulb slightly.

3. In the connector lock, turn 

››› 

Fig. 118

 to-

wards the arrow 

1

 and pull the connec-

tor.

4. Rotate the bulb holder in the direction of

arrow 

2

 and extract it with the bulb.

5. Replace the defective bulb with a new

bulb with the same features.

6. Insert the bulb holder in the number plate

light and turn in the opposite direction of
arrow 

2

 until it stops.

7. Plug the connector into the bulb holder.

Note

Depending on how equipped the vehicle is,
the number plate lights may be LEDs. LEDs
have an estimated life that exceeds than that
of the car. If a light with LEDs fails, go to an
authorised workshop for replacement.

100

Operation

Fig. 119 

Instruments and controls.

102