2017 Seat Leon 5D lane assist

Frequently Asked Ques-
tion
sBefore driving
How do you adjust the seat?
››› page 19
How do you adjust the steering wheel? ››› page 21
How do you adjust the exterior mirrors? ››› page 21
How do you turn on the exterior lights? ››› page 30
How does the automatic gearbox selector lever work?
››› page 50
How do you refuel? ››› page 58
How do you activate the windscreen wipers and wind-
screen washer system? ››› page 32
Emergency situations
A warning lamp lights up or flashes. What does this
mean? ››› page 47
How do you open the bonnet? ››› page 17
How do you perform a jump start? ››› page 70
Where is the vehicle tool kit located? ››› page 66
How do you repair a tyre with the anti-puncture kit?
››› page 65
How do you change a wheel? ››› page 66
How do you change a fuse? ››› page 63
How do you change a light? ››› page 64
How do you tow a vehicle? ››› page 69
Useful tips
How do you set the time? ››› page 115
When should the vehicle inspection should be per-
formed? ››› page 44
What functions do the buttons/thumbwheels on the
steering wheel perform? ››› page 121
How do you remove the luggage compartment cover?
››› page 169
How do you drive in an economical and environmental-
ly-friendly way? ››› page 200
How do you check and top up the engine oil?
››› page 59
How do you check and top up the engine coolant?
››› page 60
How do you top up the windscreen washer fluid?
››› page 61
How do you check and top up the brake fluid?
››› page 61
How do you check and adjust tyre pressure values?
››› page 280
Vehicle washing tips ››› page 257
Functions of interest
Easy Connect, CAR menu ››› page 33
How does the START-STOP system work? ››› page 205
What parking assistants are available? ››› page 237
How does the rear assist work? ››› page 243
How does the adaptive cruise control work?
››› page 214
How can the SEAT driving mode be adjusted?
››› page 230
How does the lane departure warning system work?
››› page 224
How does tyre pressure monitoring work? ››› page 284
How do you open the vehicle without a key (Keyless Ac-
cess)? ››› page 129
Interior lighting and ambient light ››› page 147

Table of Contents
Automatic gearbox/DSG automatic gear-
bo x*
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Ad
dress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Run-in and economical driving . . . . . . . . . . . . . 199
Power management . . . . . . . . . . . . . . . . . . . . . . 201
Engine management and emission control sys-
tem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Driv

ing tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Driver assistance systems . . . . . . . . . . . . . . . . . 205
Start-Stop System* . . . . . . . . . . . . . . . . . . . . . . . 205
Auto Hold Function* . . . . . . . . . . . . . . . . . . . . . . 208
Cruise control system (CCS)* . . . . . . . . . . . . . . . 209
Emergency brake assist system (Front As-
sis
t)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Adaptive Cruise Control ACC* . . . . . . . . . . . . . . 214
Lane Assist system* . . . . . . . . . . . . . . . . . . . . . . 224
Traffic Jam Assist . . . . . . . . . . . . . . . . . . . . . . . . 227
Emergency Assist . . . . . . . . . . . . . . . . . . . . . . . . 228
SEAT Drive Profile* . . . . . . . . . . . . . . . . . . . . . . . 230
Traffic sign detection system* . . . . . . . . . . . . . . 233
Fatigue detection (break recommendation)* . . 236
Parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Rear Assist “Rear View Camera”* . . . . . . . . . . . 243
Towing bracket device . . . . . . . . . . . . . . . . . . . . 246
Towing bracket device* . . . . . . . . . . . . . . . . . . . 246
Trailer towing . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Advice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Care and maintenance . . . . . . . . . . . . . . . . . . . . 256
Accessories and modifications to the vehi-
cle
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Care and cleaning . . . . . . . . . . . . . . . . . . . . . . . 257
Vehicle exterior care . . . . . . . . . . . . . . . . . . . . . . 257
Caring for the vehicle interior . . . . . . . . . . . . . . 261
Checking and refilling levels . . . . . . . . . . . . . . . 264
Filling the tank . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Engine compartment . . . . . . . . . . . . . . . . . . . . . 270 Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . 274
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Windscreen washer reservoir . . . . . . . . . . . . . . 276
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Wheels
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Wheels and tyres . . . . . . . . . . . . . . . . . . . . . . . . 279
Tyre monitoring systems . . . . . . . . . . . . . . . . . . 283
Temporary spare wheel . . . . . . . . . . . . . . . . . . . 286
Winter service . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Technical data . . . . . . . . . . . . . . . . . . . . . . . . 289
Technical specifications . . . . . . . . . . . . . . . . . . 289
Important . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
Vehicle identification data . . . . . . . . . . . . . . . . . 289
Fuel consumption data . . . . . . . . . . . . . . . . . . . 290
Trailer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Wheels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291
Engine data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
6

The essentialsMenuSubmenuPossible settingDescription
Lights
Light assistDynamic Light Assist, Light Assist, motorway function, turning-on time, headlamp
range adjustment, automatic lights when raining, one-touch signalling, travel mode.›››
page 140
Vehicle interior lightingBrightness of instrument panel and controls››› page 147
Coming Home/Leaving Home functionSwitch-on time of the “Coming home” and “Leaving home” functions››› page 143
››› page 144
Driver assistance
ACC (adaptive cruise control)Activation and deactivation: default distance level, driving profiles.››› page 214
Front Assist (emergency brake as-
sist system)Activation and deactivation: Front Assist, advance warning, distance warning display››› page 210
Lane Assist (system warning you if
you leave the lane)Activation and deactivation of lane departure warning, adaptive lane guidance››› page 224
Detection of traffic signsDisplay on the instrument panel, activation and deactivation of the speed warning››› page 233
TrailerTrailer recognition (display of traffic signs for vehicles with trailer), use to calculate
the route, maximum speed for trailer››› page 246
Fatigue detectionActivation and deactivation››› page 236
Parking and ma-
noeuvring
ParkPilotAutomatic activation, front volume, front sound treble, rear volume, rear sound tre-
ble, adjust Infotainment volume››› page 237
Auto HoldSwitching on and off when starting off››› page 208
Electric parking brakeSwitching on and off automatically››› page 183
Braking while manoeuvring functionSwitching on and off››› page 242
Displaying the parking spaceSwitching on and off
Ambient lighting–Switching on and off, selecting brightness, colour, area or total››› page 147 34

The essentials
● To sw
it
ch system off: press the but-
ton  or
 . The stored speed is de-
l et
ed.
Assist systems menu
MenuFunction
ACCDisplay of Adaptive Cruise Control
(ACC) ››› page 214.
Front AssistSwitching the monitoring system
on and off ››› page 210.
Lane Assist *Switching the Lane Assist system
on or off ››› page 225.
Detection of
traffic signsDisplay of traffic signs
››› page 233:
Fatigue detec-
tion *Switching the fatigue detection
on or off (pause recommenda-
tion) ››› page 236. Timer*
You can access the timer via the selection
menu
››
›

page 37.
It allows you to manually time lap times on a
racing circuit, memorise them and compare
them to the vehicle's previous best times.
The following menus can be displayed:
● Stop ●
Lap
● Pause
● Partial time
● Statistics
Chang
e from one menu to another
● Vehicles without multifunction steering
wheel:
press the rocker switch  in the
w ind
s
creen wiper lever.
● Vehicles with multifunction steering wheel:
turn the wheel ›

›› Fig. 44.
Menu “Stop”
Start
The timer starts.
If there are existing laps and they are
included in the statistics, it will begin
with the number of laps in question.
It is only possible to begin with a new
first lap if the statistics have been re-
set first in the Statistics menu.
Since start
The timer begins when the vehicle
sets off.
If the vehicle is already moving, the
timer begins once the vehicle has
stopped.
StatisticsThe Statistics menu is displayed
on the screen.
Menu “Lap”
New lap
The timer of the current lap stops and
a new lap starts immediately. The time
for the lap you have just completed is
included in the statistics.
Partial timeFor about 5 seconds a partial time is
displayed. The timer continues in par-
allel.
StopThe current lap timer will be interrup-
ted. The lap does not end. The Pause
menu is displayed.
Menu “Pause”
ContinueThe interrupted timer continues.
New lapA new timer starts. The halted lap
ends and is included in the statistics.
Interr. lapThe timer of the current lap ends and
is cancelled. It is not included in the
statistics.
EndThe current timer ends. The lap is in-
cluded in the statistics.
Menu “Partial time”
Partial
timeFor about 5 seconds a partial time is
displayed. The timer continues in par-
allel.
New lap
The timer of the current lap stops and
a new lap starts immediately. The time
for the lap you have just completed is
included in the statistics. 40

The essentials
Yellow warning lamps Central warning lamp: additional
information on the instrument
panel display–

Front brake pads worn.›››
page
186 
it lights up:
Fault in the ESC, or
disconnection caused by the sys-
tem.
››› page
187
flashes: ESC or ASR activated. 
ASR manually deactivated.›››
page
187ESC in Sport mode or OFF 
ABS faulty or does not work.

Rear fog light switched on.›››
page
140 
lights up or flashes:
fault in the
emission control system.››› page
202 
it lights up:
pre-heating of diesel
engine.
››› page
203
flashes: fault in the diesel engine
management. 
fault in the petrol engine man-
agement.›››
page
203 
lights up or flashes:
fault in the
steering system.››› page
198 
Tyre pressure too low, or fault in
the tyre pressure monitoring sys-
tem.›››
page
283 
Fuel tank almost empty.›››
page
118 
Fault in airbag system and seat
belt tensioners.›››
page
90 
Lane Assist is switched on, but
not active.›››
page
224 Other warning lamps

Left or right turn signal.›››
page
141
Hazard warning lights on.››› page 31
››› page
145 
Trailer turn signals›››
page
246 
it lights up:
Press the foot brake!
flashes: the selector lever locking
button has not engaged.››› page
191
››› page
216 
it lights up:
cruise control activa-
ted or speed limiter switched on
and active.
››› page
209
flashes: the speed set by the
speed limiter has been exceeded. 
green warning lamp: Lane Assist
is switched on and active.›››
page
224 
Main beam on or flasher on.›››
page
141 
Natural gas operating mode›››
page
119 
››› in Warning and control lamps on
page 119
››› page 119 On the instrument panel display
Fig. 52
On the instrument panel display: door
open.  
Do not continue driving!
With the corresponding indi-
cation: door(s), rear lid or bon-
net open or not properly
closed.››› page
125
››› page
135
››› page
270 48

Safety
Event Data Recorder D e
s
cription and operation Your vehicle has an event data recorder
(EDR).
The EDR’s f
u

nction is to record data in the
event of a mild or serious accident. These da-
ta are used to support the analysis of how
different vehicle systems behaved.
The EDR records, over a reduced time range
(normally 10 seconds or less), dynamic driv-
ing data and data from the restraint systems,
such as:
● How different vehicle systems worked.
● Whether the driver and the occupants were
we arin

g their seatbelts.
● How hard the acceleration or brake pedal
was
pressed.
● Vehicle speed.
These dat
a will provide a better understand-
ing of the circumstances of the accident.
Data from the driving assist systems are also
recorded. This includes data such as whether
the systems were inactive or active and if
such action had an impact on the vehicle’s
dynamic behaviour, changing its path in the
aforementioned situations, accelerating or
decelerating the vehicle. Depending on vehicle equipment, this in-
cludes

data from systems such as:
● Adaptive Cruise Control (ACC)
● Emergency brake assist system (Front As-
sis
t).
● Park Pilot system
● Lane Assist
The EDR data ar
e only recorded in specific ac-
cident situations. No data are recorded in
normal driving conditions.
No audio or video data inside or around the
vehicle are recorded. Under no circumstances
are personal data such as name, age, or gen-
der recorded. Nevertheless, third parties
(such as criminal proceedings authorities)
may relate the contents of the EDR data to
other data sources and create a personal ref-
erence in the context of an accident investi-
gation.
In order to read the EDR data it is necessary
to access (if legally permitted to do so) the
vehicle's ODB (“On-Board-Diagnose”) inter-
face while the vehicle is switched on.
SEAT will not have access to EDR data unless
the owner (or, in “Leasing” cases, the lessee
or hirer) gives their consent. There may be ex-
ceptions to this, depending on legal or con-
tractual provisions.
Due to legal requirements in safety-related
products, SEAT may use the EDR data for field research and in order to improve vehicle sys-
tem quality. An

y data used for the purposes
of research will be treated anonymously (in
other words, no reference will be made to the
vehicle, their owner or the lessee/hirer).
94

Driver assistance systems
rough tracks and uneven terrain as much as
po s
s
ible. WARNING
● Ev en w

ith four-wheel drive, you should al-
ways adjust your speed to suit the condi-
tions. Do not let the extra safety features
tempt you into taking any risks when driving.
Risk of accident!
● The braking capability of your vehicle is
limited by
the tyres' grip. It is therefore no
different from a car without four-wheel drive.
So do not be tempted to drive too fast on firm
or slippery roads just because the vehicle
still has good acceleration in these condi-
tions. Risk of accident!
● On wet roads bear in mind that the front
wheels m
ay start to “aquaplane” and lose
contact with the road if the car is driven too
fast. If this should happen, there will be no
sudden increase in engine speed to warn the
driver, as occurs with a front-wheel drive car.
For this reason you should always choose a
driving speed suitable for the road condi-
tions. Risk of accident! Driver assistance systems
St ar
t

-Stop System*
Description and operation The Start-Stop system helps save fuel and re-
duce C
O
2 emi

ssions.
In Start-Stop mode, the engine will automati-
cally switch off when the vehicle stops or is
stopping; for example when stopping at traf-
fic lights. The ignition remains switched on
during the stopping phase. The engine auto-
matically switches back on when required. In
this situation, the light of the START ENGINE STOP button stays on
1)
.
As soon a
s

the ignition is switched on, the
Start-Stop function is automatically activa-
ted.
Further information about the Start-Stop sys-
tem can be found in the Easy Connect sys-
tem: by pressing the  button in the Vehi-
cle status menu.
B a
s

ic requirements for the Start-Stop mode
● The driver door must be closed.
● The driver must have their seat belt fas-
tened. ●
The bonnet mus
t be closed.
● The engine must have reached a minimum
servic
e temperature.
● The reverse gear must not be engaged.
● The vehicle must not be on a very steep
slope. WARNING
● Never sw it

ch the engine off until the vehi-
cle is stationary. The brake servo and power
steering functions will not be completely cov-
ered under warranty. More force may also be
needed to turn the steering wheel or to brake.
As you cannot steer and brake in the normal
manner, there is a greater risk of accidents
and serious injury.
● Never remove the key from the ignition if
the vehic
le is in motion. Otherwise, the steer-
ing could lock making it impossible to steer
the vehicle.
● To avoid injury, make sure that the Start-
Stop sys
tem is switched off when working in
the engine compartment ››› page 207. CAUTION
The Start-Stop system must always be
swit c

hed off when driving through flooded
areas ››› page 207. 1)
Only in vehicles with Keyless Access.
205
Technical data
Advice
Operation
Emergencies
Safety

Driver assistance systems
The function is intended to prevent collisions
w ith p
ark
ed vehicles or vehicles in the same
lane travelling in the same direction, or with
pedestrians crossing the vehicle’s path. It
may fail to activate in other danger situa-
tions.
The Front Assist function is active within a
range of speeds between 4 km/h (2.5 mph)
and 250 km/h (156 mph). Depending on
speed, traffic conditions and driver behav-
iour, some of the sub-functions described be-
low are omitted in order to optimise the sys-
tem’s general behaviour.
The Front Assist is a driving assistance func-
tion that can never replace the driver’s atten-
tion.
Safety distance warning
If the system detects a situation of danger
because the vehicle is too close to the vehi-
cle ahead, it will warn the driver by means of
an indication on the instrument panel display
.
The timing of the warning varies depending
on driver behaviour and the traffic situation.
Advance warning
If the system detects a possible collision with
the vehicle in front, it may alert the driver by
means of an audible warning and an indica-
tion on the instrument panel display
››› Fig. 204. The warning moment varies depending on
the traffic s
ituation and driver behaviour. At
the same time, the vehicle will prepare for a
possible emergency braking ››› .
C ritic
a

l warning
If the driver fails to react to the pre-warning
(advance warning), the system may actively
intervene in the brakes and generate a brief
jolt to warn the driver of the imminent danger
of a collision.
Automatic braking
If the driver also fails to react to the critical
warning, the system may initiate independ-
ent emergency braking by progressively in-
creasing the braking effect in accordance
with how critical the situation is.
Driver emergency brake assist system
Faced with an imminent collision, the system
may detect that the driver is not braking hard
enough to avoid the collision. In this case, it
will automatically increase the braking effect.
Due to certain driving circumstances and the
limitations of its operation, there are some
cases in which the system cannot prevent a
collision, although it can significantly mini-
mise the consequences by reducing the
speed and the force of the impact. WARNING
Observe the safety warnings ›››
in Warning
and contr o
l lamps on page 119. WARNING
The Front Assist system cannot change the
la w

s of physics or replace the driver in terms
of keeping control of the vehicle and reacting
to a possible emergency situation. WARNING
Following a Front Assist emergency warning,
pa y

immediate attention to the situation and
try to avoid the collision by braking or by
dodging the obstacle, as applicable.
● If the Front Assist does not work as descri-
bed in this c
hapter (e.g. it repeatedly inter-
venes unnecessarily), switch it off.
● Adapt your speed and safe distance to the
vehicl
e in front of you at all times to suit visi-
bility, weather, road and traffic conditions.
● The Front Assist alone cannot avoid acci-
dents and seriou
s injuries.
● In complex driving situations, occasionally
the Front As
sist may issue warnings and in-
tervene in braking unnecessarily, for example
at traffic islands.
● If the operation of the Front Assist is im-
paired, f
or example, by dirt or because the ra-
dar sensor has lost its settings, the system
may issue unnecessary warnings and inter-
vene inopportunely in the braking. » 211
Technical data
Advice
Operation
Emergencies
Safety