brake Seat Leon 2020 Owner's Guide

Driving
ignition, the function will remain on the next
time the ignition is s wit
ched on.
If the Auto Hold function was not switched on,
it will automatically remain off next time the
ignition is engaged.
The Auto Hold function connects automat-
ically if the following conditions are met
(all points must be met at the same time
››› ):
The v ehicl

e is kept stationary with the
brake pedal on a flat surface or on a
slope.
The engine rotates “correctly”.
The Auto Hold function is automatically
turned off if the following conditions are
met: If any of the conditions mentioned on
››› page 277, Conditions for keeping
the vehicle stationary with the Au-
to Hold function are no longer met.
If the engine is running irregularly or an
anomaly is detected.
If the engine stalls.
Manual gearbox: The clutch and the ac-
celerator are pressed at the same time.
Automatic gearbox: If the accelerator is
pressed
Automatic gearbox: If any of the tyres
has only minimal contact with the
1.
2.
1.
2.
3.
4.
5. ground, e.g. in the case of axle articula-
tion. WARNING
The smart technology incorporated into
the Aut o Hol

d function cannot defy the
laws of physics; it only works within the lim-
its of the system. The greater convenience
provided by the Auto Hold function should
never tempt you to take any risk that may
compromise safety.

Braking and parking
Brake assist systems Electronic Stability Control (ESC)
The ESC helps t
o impr
ove safety. It reduces
the tendency to skid and improves the stabili-
ty and roadholding of the vehicle. The ESC
detects critical handling situations, such as
vehicle understeer or oversteer, or wheelspin
on the driving wheels. It stabilises the vehicle
by braking individual wheels or by reducing
the engine torque. The warning lamp will
flash on the instrument panel when the ESC is
intervening !.
The ESC includes the anti-lock brake system
(ABS), the hydraulic brake assist (HBA), the
traction control system (TCS), electronic dif-
ferential lock (EDS), electronic torque control
(XDS) and the tractor-trailer sway mitiga-
tion*.
ESC also helps stabilise the vehicle by
changing the torque.
The TCS can be deactivated when wheel
spin is desirable ››› page 281
.
Anti-lock brake system (ABS)
ABS prevents the wheels from locking up un-
der braking until the vehicle has reached a
virtual standstill. You can continue to steer the
vehicle even when the brakes are on full.
Keep your foot on the brake pedal and do not
pump the brakes. You will feel the brake pedal
pulsate while the ABS is working. If the running gear or brake system is modi-
fied, the eff
ectiv

eness of the ABS could be se-
verely limited.
Hydraulic Brake Assist (HBA)
The brake assist system can reduce the re-
quired braking distance. The braking force is
automatically boosted if you press the brake
pedal quickly in an emergency. You must
keep pressing the brake pedal until the dan-
ger has passed.
Traction control (TCS)
In the event of the wheels spinning, the TCS
reduces the engine torque to adapt to the
road condition. This helps the car to start
moving, accelerate or climb a gradient.
Electronic differential lock (EDL)
When the EDL detects wheelspin, it brakes
the spinning wheel and directs the power to
the other driven wheel. This function is active
up to approximately 100 km/h (62 mph).
To prevent the disc brake of the braked wheel
from overheating, the EDL cuts out automati-
cally if subjected to excessive loads. The ve-
hicle can still be driven. The EDL will switch on
again automatically when the brake has
cooled down. Tractor-trailer sway mitigation*
If the vehicl
e is pulling a trailer, it will control
the following: tractor-trailers tend to sway.
When the swaying of the trailer is felt by the
vehicle and detected by the ESC, it will auto-
matically brake the towing vehicle within the
limits of the system and mitigate the sway.
Tractor-trailer sway mitigation is not available
in all countries ››› page 303
.
Electronic engine torque management
(XDS)
When taking a curve, the driveshaft differen-
tial allows the outer wheel to turn at a higher
speed than the inner wheel. In this way, the
wheel that is turning faster (outer wheel) re-
ceives less drive torque than the inner wheel.
This may mean that in certain situations the
torque delivered to the inner wheel is too
high, causing the wheels to spin. On the other
hand, the outer wheel is receiving a lower
drive torque than it could transmit. This can
cause a loss of grip on the drive axle, in this
case the front axle, which results in under-
steer or “lengthening” of the trajectory.
The XDS can detect and correct this effect
via the sensors and signals of the ESC.
Via the ESC, the XDS will brake the inside
wheel and counter the excess driving torque
of that wheel. This means that the requested
trajectory is much more precise. »
279

Driving
XDS works in combination with the ESC and is
al w
ays active, even when TCS is switched off,
or when the ESC is in Sport mode or discon-
nected.
Multi-collision brake
The multi-collision brake consists of automat-
ic braking activated by the Airbag control
unit. It is activated when, in the event of an
accident, the Airbag control unit detects de-
celerations above the activation level, and
braking is managed by the ESC system.
In the event of an accident, the multi-collision
brake can help the driver by braking to avoid
the risk of skidding during the accident and
causing other collisions.
The following actions control automatic brak-
ing during the accident:

Help with parking and manoeuvring
Parking with the parking assist system Fig. 199
On the instrument panel display: paral-
l el parking.  Finding a parking space
.  Park-
ing position.  Manoeuvring. Fig. 200
On the instrument panel display: angle
parking.  Finding a parking space .  P

arking
position.  Manoeuvring. Message to move forwards
Y
our v

ehicle
Parking space detected
Message to park
Message to press the brake pedal
Progress bar
1 2
3
4
5
6 The necessary conditions have to be met to
park with P
ark Assist
›
›› page 284
and the
parking mode must be selected ››› page 285
.
Parking

Help with parking and manoeuvring
Visual indication segments Fig. 203
Parking aid view on the Infotainment
syst em displ
ay. The optical indication of the segments works
as f
oll

ows:
Grey segments: the obstacle is more
than approx. 30 cm away from the path
or in the direction opposite to travel.
They are also displayed when the elec-
tronic parking brake is activated.
Yellow segments: the obstacles lie on
the vehicle’s path and are at a distance
of less than approx. 30 cm away.
Red segments: obstacles are less than
approx. 30 cm away.
A wake will indicate the anticipated forward
or backward trajectory, depending on the en-
gaged gear. –
–
– If an obstacle is located in the vehicle’s way,
the corresponding audibl

e warning will
sound.
When the penultimate segment is displayed,
the vehicle has reached the collision zone. In
the collision zone, the obstacles are repre-
sented in red (including those out of the
path). Stop the vehicle! ››› in Introduction
on page 290, ››

› in Introduction on
page 290 !
Setting the indications and audio
signal s The indications and acoustic signals are set
in the Inf
ot

ainment system: function button 
> Driver assistance> Parking aid: Setup
Automatic activa-
tion On/off
Front volume* Volume in the front and rear
area.
R

ear volume* Volume in the rear area.
Adjust volume When the parking aid is
s
wit

ched on, the volume of
the audio source will be re-
duced, depending on the se-
lected option. Error messages
If a an error or fault message appears on the
instrument clust
er in P

ark Assist, there is a
fault.
If the fault doesn't disappear before discon-
necting the ignition, it will not be indicated
next time the parking aid is connected.
If a rear sensor is faulty, only the obstacles in
the areas A and
B are displayed
› ›

› Fig. 202. If a front sensor is faulty, only the
obstacles in the areas C and
D will be dis-
pl ayed. Symbol

Driving
Manoeuvre braking function* The emergency braking function is used to
minimise damage in the e
v
ent of a collision.
Depending on the equipment, if the Parking
Aid is active, the braking while manoeuvring
function activates emergency braking when it
detects an obstacle in the vehicle’s path that
could cause a collision, driving forwards or in
reverse.
The function will not brake if the Parking Aid is
activated automatically. For the system to
operate, manoeuvring speed must be be-
tween 2.5-7 km/h (1.5-4 mph) for the front
area and between 1.5-7 km/h (1-4 mph) for
the rear.
Following an intervention, the braking while
manoeuvring function will be inactive in the
same direction of travel for 5 metres. Once
the gear is changed, or the selector lever’s
position is changed, the function will be ac-
tive again. The Parking Aid’s limitations apply.
The braking while manoeuvring function is set
in the Infotainment system: function button 
> Driver assistance> Parking aid.
Temporary suppression of emergency
braking

Driving
Trailer brakes
If the tr ail
er has its own brake system, please
take the relevant legal requirements into ac-
count. Never connect the trailer's brake sys-
tem to the vehicle's brake system.
Tow cable
Always use a cable between the vehicle and
the trailer ››› page 300
.
Trailer tail lights
The trailer's rear lights should comply with
the statutory safety regulations ››› page 300
.
Never connect the trailer's rear lights directly
to the vehicle's electric system. If you are not
sure that the trailer's electrical connection is
correct, have it checked by a specialised
workshop. SEAT recommends visiting a SEAT
dealership for this.
Exterior mirrors
If you cannot see the area behind the trailer
with the exterior mirrors of the towing vehicle,
additional mirrors will have to be installed in
accordance with the regulations of the coun-
try in question. The exterior mirrors should be
adjusted before you start driving and must
provide a sufficient field of vision at the rear. WARNING
If the towing bracket is wrongly fitted or is
not the right one , the tr

ailer could become detached from the vehicle and cause seri-
ous injury.
CAUTION

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
Brake fluid Check and r efill the br
ake fluidFig. 229
Engine compartment: brake fluid res-
erv oir cap

. The brake fluid reservoir is located in the en-
gine compartment
››

› page 331
.
Checking the brake fluid level
The brake fluid level must be between the 
and  markings.
However, if the brake fluid level goes down
noticeably in a short time, or drops below the mark, there may be a leak in the brake system. Seek specialist assistance. A warning
light on the instrument panel display monitors
the brake fluid level ››› page 89
.
In right-hand drive vehicles the brake fluid
reservoir is on the other side of the engine
compartment. Changing brake fluid
We r

ecommend that you have the brake fluid
changed by a Technical Service. WARNING
If the brake fluid level is low or unsuita-
bl e/ol

d brake fluid is used, the brake sys-
tem may fail or braking power may be re-
duced.

Maintenance
Wheels Problem Solution
Antifreeze salt Water
Brake abrasion
dust Acid-free special cleaning
productEnd exhausts
Problem Solution
Antifreeze salt Water, if a steel cleaning prod- uct is requir
ed Covers / Trims
Problem Solution
Dirt Neutral soap solutiona)
, if a
st eel cl

eaning product is re-
quired a)
Neutral soap solution: two tablespoons maximum in
1 litr e of w

ater
Paint Problem Solution
Paint flaws Check the paint