2018 Seat Leon ignition

Driving
Ignition is switched on
This driv er message is displ
ayed and a buz
-
zer is sounded when the driver door is
opened with the ignition switched on. WARNING

Start and driving
Since the luggage rack increases the aer o-
dynamic dr ag
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*.
Power management
This system helps to ensur
e relia-
ble starting The power management controls the distri-
bution of el
ectrical ener
gy and thus helps t

o
ensure that there is always enough power
available to start the engine.
If a vehicle with a conventional electrical sys-
tem is left parked for a long time, the battery
will gradually lose its charge because certain
electrical devices, such as the electronic
gearbox lock continues to draw current even
when the ignition is off. In some cases there may not be enough power available to start
the engine.
Your v

ehicle is equipped with an intelligent
power management system to control the
distribution of electrical energy. This signifi-
cantly improves reliability when starting the
engine, and also prolongs the useful life of the
battery.
The main functions incorporated in the power
management system are battery diagnosis,
residual current management and dynam-
ic power management.
Battery diagnosis
The battery diagnosis function constantly
registers the condition of the battery. Sensors
detect the battery voltage, battery current
and battery temperature. This enables the
system to calculate the current power level
and charge condition of the battery.
Residual current management
The residual current management reduces
power consumption while the vehicle is
parked. It controls the supply of power to the
various electrical devices while the ignition is
switched off. The system takes the battery di-
agnosis data into consideration.
Depending on the power level of the battery,
switch off the individual electrical devices
one after the other to prevent the battery from losing too much charge and to ensure
that the engine can be started r
eliably.
Dynamic power management
While the vehicle is moving, this function dis-
tributes the available power to the various
electrical devices and systems according to
their requirements. The power management
ensures that on-board systems do not con-
sume more electrical power than the alterna-
tor can supply, and thus maintains the maxi-
mum possible battery power level. Note

Driving
running. In this case power is consumed when
none is being gener at
ed.
In these sit
uations you will be aware that the
power management system is intervening to
control the distribution of electrical power.
When the vehicle is parked for long peri-
ods
If you do not drive your vehicle for a period of
several days or weeks, the power manage-
ment will gradually shut off the electrical de-
vices one by one or reduce the amount of
current they are using. This limits the amount
of power consumed and helps to ensure reli-
able starting even after a long period. Some
convenience functions, such as remote vehi-
cle opening, may not be available 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 gener
ates 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 working, 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. Engine management and
emission control system
Intr
oduction WARNING

Driving
Lane Assist system* Intr oduction Fig. 277
On the windscreen: field of vision of
the L ane Assist syst
em camer
a.Using the camera located in the windscreen,
the L
ane Assist syst
em det

ects the possible
lines dividing the lanes. When the vehicle in-
voluntarily approaches a dividing line it has
detected, the system notifies the driver with a
corrective steering movement. The purpose is
not only to warn the driver, but also to keep
the vehicle inside the lane. This movement
can be over-regulated at any time.
No warning is produced with the turn signals
activated, given that the Lane Assist system
understands that a lane change is required. Control lamp "
It lights up yellow
Lane Assist active but not available.
The system cannot accurat
ely recognise the lane.
Please see page 286, Lane Assist system is not avail-
able (the control lamp is lit up yellow). "
It lights up green
Lane Assist system active and available. Some control and warning lamps will light up
briefly when the ignition is s
wit
ched on t

o
check certain functions. They will switch off
after a few seconds. WARNING
Observe the safety warnings

Practical tips
Refuelling with natural gas Fig. 305
Open tank lid: gas filler mouth 1 ,
fill er mouth r
et
ainer 2 Before r
efuelling, the engine and the ignition,
mobil e t

elephone and heating must be
switched off separately

Index
Auto Hold function . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Aut o L
ock (centr
al locking) . . . . . . . . . . . . . . . . . . . 127
Automatic car washes switching the Auto Hold function off . . . . . . . 269
Automatic car wash tunnel . . . . . . . . . . . . . . . . . . 346
Automatic dipped beam control . . . . . . . . . . . . . 144
Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . 249 downhill speed control . . . . . . . . . . . . . . . . . . . . 255
driving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 252
emergency program . . . . . . . . . . . . . . . . . . . . . . 256
kick-down feature . . . . . . . . . . . . . . . . . . . . . . . . . 254
launch control program . . . . . . . . . . . . . . . . . . . 254
manual release of the selector lever . . . . . . . . 41
safety interlock for ignition key . . . . . . . . . . . . 235
selector lever lock . . . . . . . . . . . . . . . . . . . . . . . . . 251
selector lever positions . . . . . . . . . . . . . . . . . . . 249
steering wheel with gear shift paddles . . . . 252
tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249, 252
Automatic transmission control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
AUX-IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . 233 external audio source . . . . . . . . . . . . . . . . . . . . . 207
Average consumption . . . . . . . . . . . . . . . . . . . . . . . 104
B Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . 134
Before setting off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Belt tensioners control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Belt tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . 318
Bluetooth

Index
Electronic Stability Control (ESC) . . . . . . . . . . . 245
El ectr
onic t
orque management (XDS) . . . . . . . 246
Emergencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. 83 anti-puncture kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
automatic gearbox emergency program . . 256
bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . 52
changing a wheel . . . . . . . . . . . . . . . . . . . . . . . . . . 54
emergency towing of the vehicle . . . . . . . . . . . 58
fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . 51
hazard warning lights . . . . . . . . . . . . . . . . . . . . . 148
jump leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
manual unlocking and locking . . . . . . . . . . . . . . 85
puncture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
replacing a blown fuse . . . . . . . . . . . . . . . . . . . . . . 51
replacing the battery . . . . . . . . . . . . . . . . . . . . . . 331
vehicle tool kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Emergency Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . 288 switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Emergency braking assistance system indications on the display . . . . . . . . . . . . . . . . . . 271
malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. 272
operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
radar sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
switching off temporarily . . . . . . . . . . . . . . . . . . 274
system limitations . . . . . . . . . . . . . . . . . . . . . . . . . 274
Emergency braking function . . . . . . . . . . . . . . . . 243
Emergency braking warning . . . . . . . . . . . . . . . . . 148
Emergency operation front passenger door . . . . . . . . . . . . . . . . . . . . . . . 16
selector lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Emission control system catalytic converter . . . . . . . . . . . . . . . . . . . . . . . . 263
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
particulate filter . . . . . . . . . . . . . . . . . . . . . . . . . . . 263 Emissions data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Engine
assisted starting . . . . . . . . . . . . . . . . . . . . . . . . . . . .
59
noises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . 239
preheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
235
running in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 258
starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 235
starting up (driver messages with the me- chanical contact) . . . . . . . . . . . . . . . . . . . . . . . 235
switching off (key) . . . . . . . . . . . . . . . . . . . . . . . . . 236
Engine and ignition automatic ignition switch-off . . . . . . . . . . . . . . 237
My Beat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 240
preheating the engine . . . . . . . . . . . . . . . . . . . . 238
starting the engine . . . . . . . . . . . . . . . . . . . . . . . . 238
starting the engine with Press & Drive . . . . . 238
stopping the engine . . . . . . . . . . . . . . . . . . . . . . . 239
Engine breakdown Control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Engine compartment . . . . . . . . . . . . . . . . 18, 322, 324 battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50, 329
brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49, 328
coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49, 327
engine oil . . . . . . . . . . . . . . . . . . . . 47, 324, 325, 326
opening and closing . . . . . . . . . . . . . . . . . . . . . . 323
safety notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
windscreen washer reservoir . . . . . . . . . . 50, 329
Engine coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
G 12 plus-plus . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 49
G 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 49
specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 49
temperature display . . . . . . . . . . . . . . . . . . . . . . . 118
warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Engine data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 358 Engine management . . . . . . . . . . . . . . . . . . . . . . . . 262
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 47, 324 changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324, 326
checking oil level . . . . . . . . . . . . . . . . . . . . . . . . . . 325
consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
dipstick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . 325
inspection service . . . . . . . . . . . . . . . . . . . . . . . . . 324
maintenance intervals . . . . . . . . . . . . . . . . . . . . 324
oil properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
specifications . . . . . . . . . . . . . . . . . . . . . . . . . 48, 324
topping up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. 326
Engine oil pressure control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Enlarging the boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . 159
Environment ecological driving . . . . . . . . . . . . . . . . . . . . . . . . . 259
environmental compatibility . . . . . . . . . . . . . . 259
Environmental tips filling the tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 314
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163, 313
ESC electronic stability control . . . . . . . . . . . . . . . . 245
Multi-collision Brake . . . . . . . . . . . . . . . . . . . . . . 246
Sport Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
247
Ethanol (fuel) . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . 318
Event Data Recorder . . . . . . . . . . . . . . . . . . . . . . . . 351
Exhaust purification system for vehicles with diesel engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Exterior lighting changing bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Exterior mirrors adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 21
375

Index
Head restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 156
fr ont head r
estraints . . . . . . . . . . . . . . . . . . . . . . . . 67
rear head restraints . . . . . . . . . . . . . . . . . . . . . . . . 68
Headrests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 20 adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 156
front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . 67
Heated rear window . . . . . . . . . . . . . . . . . . . . . . 44, 46
Heating and fresh air . . . . . . . . . . . . . . . . . . . . . . . . . 45
Hill driving assistant . . . . . . . . . . . . . . . . . . . . . . . . . 248
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . 101
How to jump start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 59
I Identification of the fuel . . . . . . . . . . . . . . . . . . . . . . 317
Identification plate . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Identifying letters on engine . . . . . . . . . . . . . . . . . 355
Identifying letters on the engine show . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . 108
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 32, 235
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32, 235 see also Starter button . . . . . . . . . . . . . . . . . . . . 237
Incorrect position . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Indications on the display . . . . . . . . . . . . . . . . . . . 108 ACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . 259
adaptive cruise control . . . . . . . . . . . . . . . . . . . . 277
ECO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . 107
Emergency braking assistance system(Front Assist) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
identifying letters of the engine . . . . . . . . . . . . 107
odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
SEAT Drive Profile . . . . . . . . . . . . . . . . . . . . . . . . . 289
selector lever positions . . . . . . . . . . . . . . . . . . . 249
service intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 traffic signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . 112
tyre monit
oring . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
warning and information messages . . . . . . . . 110
Indications on the screen doors, bonnet and rear lid open . . . . . . . . . . . 106
Outside temperature . . . . . . . . . . . . . . . . . . . . . . 106
positions of the selector lever . . . . . . . . . . . . . 106
speed warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Inertia mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 255
Information profiles . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Infotainment knobs . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Infotainment system . . . . . . . . . . . . . . . . . . . . . 35, 182 CD player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
function buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
general instructions for use . . . . . . . . . . . . . . . . 186
general panel of the device . . . . . . . . . . . . . . . 184
input mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 189
Jukebox (SSD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
memory card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
on-screen keypad . . . . . . . . . . . . . . . . . . . . . . . . . 189
safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . 182
text input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 189
update navigation data . . . . . . . . . . . . . . . . . . . 213
Wi-Fi Protected Setup (WPS) . . . . . . . . . . . . . 200
Infotainment System AUX-IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . 207
Bluetooth