2020 Seat Leon warning light

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

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
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:

Index
Index
Numbers and Symbol s
12-v
olt battery
assisted start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
charge level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344
charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
disconnect and connect . . . . . . . . . . . . . . 86, 338
electrolyte level . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
energy management . . . . . . . . . . . . . . . . . . . . . 344
replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
winter operations . . . . . . . . . . . . . . . . . . . . . . . . . 338
48-volt battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 control lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
A
ABS see Anti-lock brake system . . . . . . . . . . . . . . . . 279
ACC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155, 365
Activating SEAT CONNECT . . . . . . . . . . . . . . . . . . 186
Active cylinder management (ACT) status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Adapting the playback volume . . . . . . . . . . . . . . . 181
Adaptive Cruise Control . . . . . . . . . . . . . . . . . . . . . 253 control and warning lamp . . . . . . . . . . . . . . . . . 254
malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
noises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
special driving situations . . . . . . . . . . . . . . . . . . 256
status display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
system limitations . . . . . . . . . . . . . . . . . . . . . . . . . 257 AdBlue
control and w arning lamps . . . . . . . . . . . . . . . . 324
information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
minimum filling capacity . . . . . . . . . . . . . . . . . . 324
specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Additional heating see Auxiliary heating . . . . . . . . . . . . . . . . . . . . . . 165
Adjust front seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
headrest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
seat with memory . . . . . . . . . . . . . . . . . . . . . . . . . 137
time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Adjusting the seat belt . . . . . . . . . . . . . . . . . . . . . . . . 22
Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
activating and deactivating . . . . . . . . . . . . . . . . 29
centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
for the head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
for the knees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
deactivation of the front airbag . . . . . . . . . . . . 29
description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
front airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
how it works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Air conditioning
air recir culation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
air vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
parking ventilation . . . . . . . . . . . . . . . . . . . . . . . . . 165
usage instructions . . . . . . . . . . . . . . . . . . . . . . . . . 162
Air recirculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Air vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Alternator warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
Ambient lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Android Auto™ Disconnecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
establish connection . . . . . . . . . . . . . . . . . . . . . . . 191
menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
special characteristics . . . . . . . . . . . . . . . . . . . . 192
Anti-lock brake system . . . . . . . . . . . . . . . . . . . . . . 279
Anti-puncture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46, 47
Anti-puncture kit . . . . . . . . . . . . . . . . . . . . . . . . . . 45, 46 check after 10 minutes . . . . . . . . . . . . . . . . . . . . . 48
components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
inflating the tyre . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
sealing the tyre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Anti-puncture set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Anti-theft alarm system . . . . . . . . . . . . . . . . . . . . . . 107 trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301
Anti-trap function sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
sunshade blind (glass roof) . . . . . . . . . . . . . . . . 119
windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Apple CarPlay Disconnecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
establish connection . . . . . . . . . . . . . . . . . . . . . . 190
381

Index
menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
r equir
ements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
special characteristics . . . . . . . . . . . . . . . . . . . . . 191
Applications (apps) . . . . . . . . . . . . . . . . . . . . . . . . .190
Aspects to think about before starting the ve- hicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Assistance systems adaptive cruise control . . . . . . . . . . . . . . . . . . . 253
assisted parting system (Park Assist) . . . . . . 282
Auto Hold function . . . . . . . . . . . . . . . . . . . . . . . . . 277
connecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
cruise control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
disconnecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
door opening warning (Exit Assist) . . . . . . . . . 271
driver alert system . . . . . . . . . . . . . . . . . . . . . . . . . . 77
driving assist (Travel Assist) . . . . . . . . . . . . . . . 263
Emergency Assist . . . . . . . . . . . . . . . . . . . . . . . . . 265
emergency braking (Front Assist) . . . . . . . . . 249
front camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
front radar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
general notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Lane Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
lane departure warning (Side Assist) . . . . . . 267
parking aid Plus . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
PreCrash system . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
proactive speed adjustment . . . . . . . . . . . . . . 259
rear camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
rear cross traffic alert (RCTA) . . . . . . . . . 267, 270
rear parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
rear radar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
road sign detection system messages . . . . . . 78
safety advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
speed limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
system limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Tyre pressure monitor indicator . . . . . . . . . . . 352 Tyre pressure monitoring . . . . . . . . . . . . . . . . . . 352
ultrasound sensors . . . . . . . . . . . . . . . . . . . . . . . .
244
Assisted start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Audible warning control and warning lamps . . . . . . . . . . . . . . . . . 89
lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
unbuckled seat belt . . . . . . . . . . . . . . . . . . . . . . . . . 18
Auto Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Auto Hold Function . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Auto Lock (central locking) . . . . . . . . . . . . . . . . . . . 101
Automatic car wash . . . . . . . . . . . . . . . . . . . . . . . . 360 disconnecting the Auto Hold function . . . . . . 277
Automatic dipped beam headlight control . . . 121
Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . 229 control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
downhill assistant . . . . . . . . . . . . . . . . . . . . . . . . . 233
driving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
kick-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
launch-control program . . . . . . . . . . . . . . . . . . 233
operating fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
parking lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
selector lever lock . . . . . . . . . . . . . . . . . . . . . . . . 230
selector lever positions . . . . . . . . . . . . . . . . . . . . 229
steering wheel with shift paddles . . . . . . . . . . 231
tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229, 231
towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Auxiliary heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
activate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
connecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
disconnecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
electricity consumers . . . . . . . . . . . . . . . . . . . . . 168
programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
radio-operated remote control . . . . . . . . . . . . 167 remote control range . . . . . . . . . . . . . . . . . . . . . . 167
special charact
eristics . . . . . . . . . . . . . . . 166, 168
usage instructions . . . . . . . . . . . . . . . . . . . . . . . . . 168
Average fuel consumption . . . . . . . . . . . . . . . . . . . . 70
B Backrest of the rear seat folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
raise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Bag hooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147, 154
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 change on the remote control (independ-ent heating) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Battery Manager Menu . . . . . . . . . . . . . . . . . . . . . . 311
Before starting the vehicle . . . . . . . . . . . . . . . . . . . . 14
Belt tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Bicycle carrier fitting onto the coverable tow hook . . . . . . . 305
max. load rating . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Blown bulbs change a bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Bluetooth® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328, 331
opening and closing . . . . . . . . . . . . . . . . . . . . . . 329
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274 brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
brake servo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
braking assistant . . . . . . . . . . . . . . . . . . . . . . . . . . 279
electronic parking brake . . . . . . . . . . . . . . . . . . 275
emergency brake function . . . . . . . . . . . . . . . . 276
new brake pads . . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Braking assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
382