seat Seat Leon 2020 Repair Manual

Practical tips
We recommend that the oil change be done
by a t echnical service or specialised w
ork-
shop.
If the engine oil level is too low
You can get information about the correct en-
gine oil for your vehicle at your workshop.
If the recommended engine oil is not availa-
ble, in the event of an emergency you can
change the oil once with a maximum of 0.5 L
of the next oil until the next oil change:
Petrol engines: standard VW 504 00,
VW 502 00, VW 508 00, ACEA C3 or
API SN.
Diesel engines: standard VW 509 00,
VW 507 00, VW 505 01, ACEA C3 or
API CK-4.
Have the oil changed by a specialised work-
shop.
SEAT recommends using original SEAT oil to
guarantee high SEAT engine performance.
Engine oil additives
No type of additive should be mixed with the
engine oil. The deterioration caused by these
additives is not covered by the warranty. CAUTION
Take the following into account if you have
r efill

ed with an engine oil different to those –
– specified in the aforementioned standards,
or by your SEAT t
echnical service centr

e:

Practical tips
Charging the battery
The v ehicl
e battery should be charged by a
specialised workshop only, as batteries using
special technology have been installed and
they must be charged in a controlled environ-
ment.
Replacing a vehicle battery
The 12-volt vehicle battery has been de-
signed to suit its location and has special
safety features. If you need to change the
battery, please go to a service centre before
buying a new one to get information about
the electromagnetic compatibility, size and
maintenance requirements, performance and
safety of your vehicle’s new battery. SEAT
recommends you have the battery replaced
by a technical service.
Start-Stop systems ( ››› page 224
) are equip-
ped with a special battery. Therefore, it must
only be replaced with a battery of the same
specifications.
Your vehicle is equipped with an intelligent
power management system to control the
distribution of electrical energy ››› page 344
.
The power management function ensures
that the battery is charged much more effi-
ciently than on vehicles without a power
management system. To maintain this func-
tion after replacing the battery, we recom-
mend that the replacement battery used is of
the same make and type as the original fitted battery. To make proper use of the power
management function after the batt
ery has
been changed, have the battery coded to the
power management mode at a specialised
workshop. WARNING

Checking and refilling levels
by duly qualified and trained technical
st aff .
T
ake care when handling flammable sub-
stances.
In addition to a 12-volt battery, the vehicle
may be fitted with a 48-volt battery located
underneath the front passenger seat.
The works that are to be carried out on the
48 volt battery should be performed exclu-
sively by a specialised workshop with duly
qualified technical staff, trained according to
the SEAT guidelines.
Overview of the 48 volt system
The 48 volt system consists of the following
components, among others:

Wheels
convenience functions, such as remote vehi-
cl e opening, may not be av
ailable 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 system
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 con-
sumed but only a small amount supplied, es-
pecially if the battery is not fully charged ini-
tially.
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 electrical power. If you notice, for instance, that the seat heating* or the rear window
heater is not w
orking, 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. Wheels
Wheel s and t
yres
General notes

Wheels
Driving style
F ast cornering, heavy accel
eration and hard
braking (squealing tyres) all increase tyre
wear.
Wheel balance
The wheels on new vehicles are balanced.
However, certain circumstances may lead to
imbalance (run-out), which is detected as vi-
brations in the steering wheel.
Unbalanced wheels should be rebalanced,
as they otherwise cause excessive wear on
steering, suspension and tyres. A wheel must
also be rebalanced when a new tyre is fitted
or if a tyre is repaired.
Incorrect wheel alignment
Incorrect running gear alignment causes ex-
cessive tyre wear, impairing the safety of the
vehicle. If you notice excessive tyre wear, you
should check wheel alignment at a SEAT Of-
ficial Service. WARNING
Unsuitable handling of the wheels and
t yr

es may lead to sudden tyre pressure los-
ses, to tread separation or even to a blow-
out.

Wheels
design of summer tyres (width, rubber com-
pound, tr ead patt
ern) gives less grip on ice
and snow. This applies particularly to vehicles
equipped with wide section tyres or with
high speed tyres (code letters H, V or Y on
the sidewall).
Only use winter tyres of the correct type ap-
proved for your vehicle. The sizes of these
tyres are specified in the vehicle's documents
(e.g. EC Certificate of Conformity or COC 1)
).
The vehicle documentation varies depending
on the country of residence.
Winter tyres lose a great deal of their proper-
ties when the tread is worn down to a depth
of 4 mm.
The performance of winter tyres is also se-
verely impaired by ageing, even if the tread is
still much deeper than 4 mm.
A code letter indicating the speed limit is
stamped on all winter tyres ››› page 346
.
Vehicles capable of exceeding these speeds
must have an appropriate sticker attached
so that it is visible to the driver. Suitable stick-
ers are available from the SEAT Official Serv-
ice and specialised workshop. Please note
the regulations to this effect in your country.
“All-weather” tyres can also be used instead
of winter tyres. Using winter tyres with V-rating
Please not
e that the generally applicable
240 km/h (149 mph) speed for winter tyres
with the letter V is subject to technical re-
strictions; the maximum permissible speed
for your vehicle may be significantly lower.
The maximum speed limit for these tyres de-
pends directly on the maximum axle weights
for your car and on the listed weight rating of
the tyres being used.
It is best to contact a SEAT Official Service to
check the maximum speed which is permissi-
ble for the V-rated tyres fitted on your car on
the basis of this information. WARNING
Exceeding the maximum speed permitted
f or the wint

er tyres fitted on your car can
cause tyre failure, resulting in a loss of con-
trol of the vehicle – risk of accident. For the sake of the environment
When winter is over, change back to sum-
mer t yr

es at an appropriate moment. In
temperatures above +7°C (+45°F), perform-
ance will be improved if summer tyres are
used. Fuel consumption, wear and noises
while driving will all be reduced. Snow chains
Snow chains must only be fitted t
o the fr
ont
wheels, even on vehicles with four-wheel
drive.

Practical tips
Spare wheel Location and use of the t
emporary
spare wheel Fig. 238
In the luggage compartment: load
fl oor r

aised. Fig. 239
In the luggage compartment: remove
the sub w

oofer. The temporary spare wheel is stored under
the fl
oor panel in the luggage compartment
and is att

ached by a thumbnut.
The temporary spare wheel has been de-
signed to be used for short periods of time.
Have the tyres checked and replaced as
soon as possible at a SEAT Official Service or
at a specialised workshop.
The spare wheel must not be switched for a
spare wheel from another vehicle.
Removing the temporary spare wheel

Maintenance
Maintenance
SEAT Maint enance Pr
o-
gramme
Service intervals
Service work and the Digital Main-
tenance Plan Log of services performed (“Digital Main-
t
enance Pl

an”)
The SEAT dealership or a specialised work-
shop records Service receipts in a central
system. Thanks to this comprehensive docu-
mentation of the service history, it is possible
to reproduce the services performed any
time. SEAT recommends requesting a Service
receipt after every service carried out con-
taining all the services carried out on the sys-
tem.
Whenever there is a new service the receipt is
replaced with a current one.
The Digital Maintenance Plan is not avail-
able in some markets. In this case, your
SEAT dealer will inform you about the cur-
rent documentation of the work. Service works
In the Digital Maint

enance Plan, your SEAT
authorised service or specialised workshop
documents the following information:

SEAT Maintenance Programme
How to know which type of service needs
t o his v
ehicle

SEAT Maintenance Programme
SEAT Service Mobility Since the moment you purchase your SEAT
v
ehicl
e you will be able to enjoy the benefits
and coverage of the SEAT Mobility Service.
For the first two years after the purchase,
your new SEAT vehicle is automatically cov-
ered by the SEAT Mobility Service without ad-
ditional costs.
If you wish to enjoy this service after this peri-
od, you can extend SEAT Mobility as long as
you carry out the recommended Inspection
and Maintenance Services at a SEAT Author-
ised Service.
If your SEAT vehicle is immobilised due to a
fault or an accident, our assistance services
will help you keep moving.
Take into account that the SEAT Mobility
Service differs depending on the country in
which the vehicle was purchased. For further
information ask your SEAT dealership or the
SEAT website in your country.
Warranty Fault

-free operation warranty SEAT Authorised Services ensure the perfect
condition of ne
w v

ehicles. Check the pur-
chase agreement or complementary addi- tional documentation provided by your Tech-
nical Service to see the conditions and the
t

erms of the warranty. Consult further infor-
mation in this regard in your SEAT Official
Service.
Commercial warranty for the high-
volt
age battery of electric and hy-
brid vehicles of SEAT S.A. 1. Compl
ementing the aforementioned war-
r
anties, the seller SEAT dealer grants the
high-voltage batteries of the vehicles that it
has sold an 8-year or 160,000-km warranty,
whichever comes first, for any material or fin-
ish defect.
2. The reduction of the battery’s capacity
over time is conditioned by the component it-
self and does not represent a defect from a
warranty point of view.
3. The warranty for high-voltage batteries will
be invalidated when the defect is due to use,
handling or maintenance not in accordance
with the content of the instruction manual.
This is particularly applicable the battery
charge.
4. In addition, except for the duration of the
warranty, all conditions relating to the legal
warranty of the SEAT dealer (requirements,
criteria for assessing the absence of defects,
exclusion grounds, processing of entitlements to benefits, entry into force, start and scope
of the w
arr

anty validity period, etc.) shall ap-
ply in relation to the high-voltage battery. 359