check engine Seat Leon 2020 Owner's manual

Table of Contents
Operating mode selection . . . . . . . . . . . . . . . . . . 226
Manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Automatic gearbox/DSG automatic gear-
bo x* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
229
Gear
-change recommendation . . . . . . . . . . . . 235
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
SEAT Drive Profiles* . . . . . . . . . . . . . . . . . . . . . . . . 236
Driving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Driver assistance systems . . . . . . . . . . . . . . . . 241
General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Drive assist sensors and cameras . . . . . . . . . . 242
Cruise control system (CCS) . . . . . . . . . . . . . . . 245
Speed limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Emergency brake assistance system (Front
Assist)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
ACC - Adaptive Cruise Control* . . . . . . . . . . . 253
Proactive speed adjustment . . . . . . . . . . . . . . . . 259
Lane Assist* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Driving Assist (Travel Assist) . . . . . . . . . . . . . . . . . 263
Emergency Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . 265
Lane departure warning (Side Assist) with
rear cr
oss traffic alert (RCTA) and door
opening warning (Exit Assist)* . . . . . . . . . . . . . . 267
Braking and parking . . . . . . . . . . . . . . . . . . . . . . . 273
Braking system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Stabilisation and brake assistance sys-
tems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8
Parking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281
Help with parking and manoeuvring . . . . . 282
Assisted parking system (Park Assist)* . . . . . . 282
Parking aid parking and manoeuvring
(ParkPil
ot) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Parking System Plus* . . . . . . . . . . . . . . . . . . . . . . . 291 Rear parking aid* . . . . . . . . . . . . . . . . . . . . . . . . . . 294
Reverse Assist (Rear View Camera)* . . . . . . . 295
Towing bracket device* . . . . . . . . . . . . . . . . . . . 298
Trailer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Electrically unlocking trailer hook* . . . . . . . . . 304
Retrofitting a towing bracket . . . . . . . . . . . . . . . 306
Practical tips . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
High-voltage battery . . . . . . . . . . . . . . . . . . . . . 308
Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . 308
Conservation of the high-voltage bat-
tery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310
Char

ging settings in the infotainment sys-
tem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1
Charging the high-voltage battery . . . . . . . . . 312
Charging cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Checking and refilling levels . . . . . . . . . . . . . 320
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Fuel types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
AdBlue® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Engine management and emissions control
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Engine compartment . . . . . . . . . . . . . . . . . . . . . . . 328
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Cooling syst

em . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Windscreen washer reservoir . . . . . . . . . . . . . . . 337
12-volt battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
48-volt battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Energy management . . . . . . . . . . . . . . . . . . . . . . . 344
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Wheels and tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
Tyre pressure monitor system . . . . . . . . . . . . . . . 352
Spare wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
SEAT Maintenance Programme . . . . . . . . . .
356
Service intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Additional service offers . . . . . . . . . . . . . . . . . . . . 358
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359
Vehicle maintenance . . . . . . . . . . . . . . . . . . . . . 360
Maintenance and cleaning . . . . . . . . . . . . . . . . . 360
Accessories and modifications to the ve-
hicle
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 365
Accessories, spare parts and repair work . . . 365
Information for the user . . . . . . . . . . . . . . 367
Information for the user . . . . . . . . . . . . . . . . . . . 367
Information stored by the control units . . . . . . 367
Other important information . . . . . . . . . . . . . . . . 367
Information about the EU Directive
2014/53/EU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . 372
Indications about the technical data . . . . 372
Important information . . . . . . . . . . . . . . . . . . . . . . 372
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381
6

Emergencies
Tyre repairs T MS (T
yre Mobility System)* The Anti-puncture kit* (Tyre Mobility System)
will r
eliably seal punct

ures caused by the
penetration of a foreign body of up to about
4 mm in diameter. Do not remove foreign
objects, e.g. screws or nails, from the tyre.
After inserting the sealant residue in the tyre,
you must again check the tyre pressure
about 10 minutes after starting the engine.
You should only use the tyre mobility set if the
vehicle is parked in a safe place, you are fa-
miliar with the procedure and you have the
necessary tyre mobility set! Otherwise, you
should seek professional assistance.
Do not use the tyre sealant in the following
cases:

Operation
Instruments and warn-
ing/contr ol l
amps
Instrument panel Introduction The vehicle can be fitted with a instrument
panel digit
al l

ap timer or one Digital (SEAT
Cockpit).
After switching the engine on with a 12-volt
battery that is heavily discharged or newly
changed some system settings (such as the
time, the date, the personalised comfort set-
tings and the programming) might be altered
or deleted. Check and correct these settings
once the battery is sufficiently charged. WARNING
Any distraction may lead to an accident,
with the risk of injury.

Driving
Steering Inf ormation r
elating to different ve-
hicle processes. Electro-mechanical power steering adapts
el
ectr

onically to the speed of the car, torque
and steering angle.
Even if the power steering fails or the engine
is stopped, it is possible to continue to rotate
the steering wheel as long as the key remains
in the ignition, but more force must be ap-
plied.
Progressive steering
Depending on the vehicle’s features, it may or
may not incorporate a progressive steering
system.
In city traffic you do not need to turn so much
on parking, manoeuvring or in very tight turns.
On the road or on the motorway, progressive
steering transmits, for example, in bends, a
sportier, more direct and noticeably more dy-
namic driving sensation. Control lamp v
It lights up red
Faulty steering.
Do not continue driving, stop the v
ehicle as soon as
possible and in a safe manner.
Take the vehicle to a specialised workshop and have
the fault repaired as soon as possible. v
It lights up yellow
Limited steering operation.
Driv e car

efully to a specialised workshop to have the
steering checked.
If the warning light does not come on again after re-
starting the engine and driving a short distance, it is
not necessary to check the steering.
OR: The 12-v olt batt
ery was disconnected and re-
connected.
Drive a short distance at 15-20 km / h (9-12 mph). v
It flashes yellow
The steering column is jammed.
When st opped, t

urn the steering wheel in both direc-
tions.
OR: The st eering column does not unlock or lock.
T
urn off the ignition and turn it on again. Consider the
messages shown on the instrument panel display.
Do not continue driving if the steering column re-
mains locked after switching on the ignition. Seek
specialist assistance. The control lamp should light up for a few
seconds when the ignition is s
wit

ched on. It
should go out once the engine is started. WARNING
Never ignore the warning lamps or messag-
es.

Driving
Check tyre pressure
Al w
ays make sure the tyres are inflated to the
correct pressures ››› page 348
to save fuel. If
the pressure is below half bar, fuel consump-
tion may increase by 5%. Due to the greater
rolling resistance, under-inflation also increa-
ses tyre wear and impairs handling.
Do not use winter tyres all year round as
they increase fuel consumption by up to 10%.
Avoid carrying unnecessary loads
Given that every kilo of extra weight will in-
crease the fuel consumption, it is advisable
make sure that no unnecessary loads are be-
ing transported.
Since the luggage rack increases the aero-
dynamic drag of the vehicle, you should re-
move it when not needed. At speeds of
100-120 km/h (62-75 mph), this will save 12%
of fuel.
Save electrical energy
The engine drives the alternator, thereby
generating electricity. This implies that any
increase in power consumption also increa-
ses fuel consumption! For this reason, switch
off any unneeded electrical devices. Devices
that use a lot of electricity includes the blow-
er at a high setting, the rear window heating
or the seat heating*. Plug-in hybrid drive: brak
e early and evenly
to take advantage of energy recovery. Note

Towing bracket device*
This powers, for example, the trailer's interior
lighting. El ectrical de
vices such as a fridge in
a caravan only receive electrical power if the
engine is running (through pin 10).
To avoid overloading the electrical system,
you cannot connect the ground wires of pin
3 , pin 11 or pin 13 to each other.
If the trailer has a 7-contact connector, you
will need to use an adapter cable. In this case
the function corresponding to pin 10 will not
be available.
Tow cable
The tow rope must always be securely fixed
to the towing vehicle and loose enough so
that the vehicle can handle turns smoothly.
However, make sure that the cable does not
rub on the ground while driving.
Trailer tail lights
Always check the trailer's rear lights to ensure
they are working correctly and that they
comply with the relevant safety regulations. If
you connect the trailer to the factory-moun-
ted system, when you turn on the rear fog
lamp, the fog lamp of the towing vehicle will
turn off to turn on the trailer fog lamp.
Include in the anti-theft alarm
The trailer is included in the anti-theft system
if the following conditions are met:

Checking and refilling levels
Super unleaded petrol 95 octane petrol or
normal 91 oct ane petr
ol at least
We recommend refuelling with super 95 oc-
tane petrol (91 AKI). If not available, normal 91
octane petrol (87 AKI) (with a slight power
loss) may be used.
Super unleaded petrol, 95 octanes at
least
You should use super 95 octane petrol (91
AKI) at least.
If super is not available, if necessary, use nor-
mal 91 octane petrol (87 AKI). In this case only
use moderate engine speeds and a light
throttle. Refuel with super as soon as possi-
ble.
Unleaded super plus 98 octane petrol or
super 95 octane petrol at least
We recommend refuelling with super plus 98
octane petrol (93 AKI). If not available: super
95 octane petrol (91 AKI) (with a slight power
loss).
If super is not available, if necessary, use nor-
mal 91 octane petrol (87 AKI). In this case only
use moderate engine speeds and a light
throttle. Refuel with super as soon as possi-
ble. CAUTION

Checking and refilling levels

Flashes
Fault in the diesel engine management.
Hav e the engine check
ed as soon as possible by a
specialised workshop. Note
While the control lamps , ;,  or  are
on, ther
e might be faults in the engine, fuel
consumption may go up and the engine
might lose power. Catalytic converter
To maintain the useful life of the catalytic
conv
er

ter

Checking and refilling levels
Checking levels Fig. 223
Diagram for the location of the various el-
ements. From time to time, the levels of the different
fluids in the v
ehicl
e must be checked. Never
fill with incorrect fluids, otherwise serious
damage to the engine may be caused.
Coolant expansion tank ››› page 334
Engine oil level dipstick ››› page 333
Engine oil filler cap ››› page 333
Brake fluid reservoir ››› page 337
Battery 1)
››› page 338
1 2
3
4
5 Windscreen washer reservoir
› ›
› page 337 Note
The layout of parts may vary depending on
the engine . 6
Engine oil
Gener al not
es The engine comes with a special, multi-grade
oil that can be used all year r
ound.
Because the use of high-qualit

y oil is essen-
tial for the correct operation of the engine
and its long useful life, when topping up or
changing oil, use only those oils that comply
with VW standards. »1)
In plug-in hybrid vehicles (PHEV) the battery is
in the luggage compartment ››

› page 341
.
331

Checking and refilling levels
WARNING
Observe the safety warnings ››
› in Con-
tr ol and w
arning lamps on page 91. Checking the engine oil level
Fig. 224
Engine oil dipstick. The engine oil dipstick indicates the level of
the oil.
Checking oil l
e

vel