light Seat Leon 2020 Owner's Guide

Driver assistance systems
Lane departure warning (Side As-
sist) The lane departure warning uses radar sen-
sors t
o monit
or the areas behind the vehicle
››› page 9. The system does this by measur-
ing the vehicle's distance from other vehicles
and its speed differential. The lane departure
warning will not work at speeds of less than
approx. 15 km/h (9 mph).
The lane width is not detected individually,
but is rather pre-configured in the system.
Thus if you are driving in wide lanes or in be-
tween two lanes, the indications may be in-
correct. Furthermore, the system can detect
vehicles driving in the lane next to you (if
there are any), and can also detect station-
ary objects such as dividers, and thus give an
incorrect indication.
Light indication
The control lamp provides an indication on
the corresponding side regarding the traffic
situation behind the vehicle, if it is deemed to
be critical. The control lamp of the left-hand
side ››› Fig. 188
indicates the traffic situation
to the rear left of the vehicle, and the control
lamp of the right-hand side ››› Fig. 189
, indi-
cates the traffic situation to the rear right of
the vehicle. Keep the warning lamps zone of the lane de-
part
ur

e warning free of objects, adhesives or
the likes that may interfere with your visibility.
Lane assist Plus. The Lane Assist Plus function can be used by
activ
ating the

Lane Assist ››› page 261
and
Side Assist functions. In this case its functions
are expanded as described below.
If the driver initiates a lane change manoeu-
vre in a potential critical situation:

Driving
system itself, the rear and side environment of
the v ehicl
e using the rear sensors
››› page 242. It detects moving objects that
approach from behind, such as cars
››› Fig. 193.
If a critical situation is detected when the
door is opened, it will be alerted by an acous-
tic signal on the door speaker of the corre-
sponding side ››› Fig. 194
. Additionally, the
control lamp of the lane departure warning of
the corresponding door will flash. If the door
has already been opened and another road
user has been detected in a critical situation,
the control lamp of the lane departure warn-
ing on the corresponding side will light up
permanently.
The brightness of the door opening warning
indication cannot be adjusted.
When you want to access the vehicle for the
first time, with the doors closed and locked,
the function will be available 3 minutes after
the first opening of any of the doors. The
function will continue to be available as long
as the vehicle has the ignition connected and
is not moving.
After switching off the ignition, the function
will remain available for approximately 3 mi-
nutes. After that time, the control lamps will
light up indicating the deactivation of the
function. WARNING

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

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:

High-voltage battery
Charging process display  V
alid for: hybrid vehicles Fig. 211
Behind the cover of the battery charg-
ing sock et: char
ging process display Fig. 212
On the inside of the cover of the bat-
t ery char

ging socket: sticker with information
on the charging process display. An LED light on the charging socket
› ›

› Fig. 211 (arrow) shows the status of the
charging process.
A sticker on the battery charging cover pro-
vides information on the meaning of the LEDs
››› Fig. 212.
charging process displays:
Green LED ››› Fig. 212
:
Always on: Charge completed success-
fully.
Turn signals: The high-voltage battery is
charging.
1 2 Short flashes: Programmed charging is
activ
e

. The charging process has not yet
started.
Yellow LED ››› Fig. 212
:
Turn signals: The parking lock P has not
been enabled.
Always on: No electrical network has
been detected. Arrange an inspection of
the power supply and network. Seek pro-
fessional assistance.
Red LED ››› Fig. 212
:
Turn signals: Error in the charging system.
The charging process cannot start or has
paused.
Always on: The charging connector has
not been locked. Unplug the charging
connector and plug it back in to the
charging socket, making sure it is proper-
ly inserted. If the problem persists, check
the compatibility of the cable or ask a
professional for help.
Charging socket lighting
In the dark, the charging socket's side lighting
(white LED) can facilitate orientation in the
vehicle:
Ignition

High-voltage battery
Charging cable for power sockets  V
alid for: hybrid vehicles Fig. 215
Charging cable for electrical sockets Fig. 216
On the charging cable for power
sock ets: Indicat
or lamps on the protection de-
vice. ›››
Fig. 2
16
:
Indicator lamp of the connector and the
power supply.
Control lamp of the protection device
1 2 Control lamp of the vehicle
F
ailur

e warning lamp
Charging cable information
Before using the charging cable, also follow
the instructions displayed on it and on the
rear of the protective device.
Protection device
The electronic protection device ››› Fig. 216
ensures that the charging connector does
not receive current until it is plugged in to the
vehicle's charging connector.
Self-check
When the charging cable is plugged into the
electrical socket, the protective device auto-
matically performs a self-test. During this
check, all warning and indicator lamps turn
on briefly and go out one after the other.
Upon completion, the operational status at
that time is displayed.
Operating displays
One or more indicator lamps ››› Fig. 216
1 ,
2 or
3 light up green.
3 4 Display

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
b
It lights up yellow
The AdBlue reserve is low.
R efill AdBlue within the ne
xt kilometres (or miles) that
are indicated

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.

Practical tips
WARNING
The 12 volt battery is a subject to wear. A
r eduction in batt
ery power can mean that
some important safety systems, such as
power steering, braking intervention, lights
or airbag systems, operate with limitations
or stop working entirely. This may cause
serious accidents and injuries. To avoid
this, it is necessary to take the following
safety measure: