2017 Seat Leon 5D brake sensor

Driver assistance systems
When the ACC function is active, the vehicle
tr av
el
s at a set speed and distance from the
vehicle ahead. Both speed and distance can
be changed at any time.
Disconnecting and deactivating the ACC
To disconnect the ACC move the lever to the 0 position
›››
Fig. 211
(en
gaged). An ACC
deactivated message appears and the
function is totally deactivated.
If you do not wish to disconnect the ACC, just
to switch it temporarily to inactive mode
(Standby), move the third lever to position 3›››
Fig. 211 or pre s
s the brake pedal.
It will also switch to inactive mode (Standby)
if the vehicle is stopped and the driver door
is opened.
Adjusting the default distance level at the
start of your journey.
In wet road conditions, you should always set
a larger distance with regard to the vehicle in
front than when driving in dry conditions.
The following distances can be preselected:
● Very short
● Short
● Media
● Long
● Very long In the Easy Connect system you can adjust
the dis
t

ance level that will be applied when
the ACC is connected using the  button
and the S
ET
TINGS and
Driv
er a
s
sistance function
b utt
on
s ›››
 page 33.
Changing the driving profile
In vehicles with SEAT Drive Profile , the driving
profile selected can have an influence on the
ACC’s acceleration and braking behaviour
››› page 230.
In vehicles without SEAT Drive Profile , the be-
haviour of the ACC can also be affected by se-
lecting any of the following drive profiles in
the Easy Connect system:
● Normal
● Sport
● Eco
● Convenience
In this c
ase, you should access the ACC set-
tings using the  button and the
S
ET
TINGS >
Driv er a
s

sistance >
A
C
C function buttons
› ›
›
 page 33.
The following conditions may lead the ACC
not to react:
● If the accelerator is pressed.
● If there is no gear engaged.
● If the ESC is controlling. ●
If the driver i
s not wearing his/her seat
belt.
● If several brake lights of the vehicle or elec-
trically
connected trailer are damaged.
● If the vehicle is reversing.
● Driving faster than 210 km/h (150 mph).
Driver mes
sages
 ACC not available
The system can no longer continue to guar-
antee safe vehicle detection and will be de-
activated. The sensor has lost its setting or is
damaged. Take the vehicle to a specialised
workshop and have the fault repaired.  ACC and Front Assist: cur-
rently not available. No sensor
vision
This message will be displayed to the driver if
the radar sensor's vision is impaired due, for
example, to leaves, snow, heavy fog or dirt.
Clean the SEAT badge ››› Fig. 210.
 ACC: currently not available.
Gradient too steep
The maximum road slope has been excee-
ded, hence safe ACC operation cannot be
guaranteed. The ACC cannot be switched on.  ACC: only available in D, S
or M
Select the D/S or M position on the selector
lever. »
219Technical data
Advice
Operation
Emergencies
Safety

Operation
Special driving situations Fig. 214
(A) Vehicle on a bend. (B) Motorcy-
c li
s
t ahead out of range of the radar sensor. Fig. 215
(C) Vehicle changing lanes. (D) One
v ehic
l

e turning and another stationary. The adaptive cruise control (ACC) has certain
ph
y
s

ical limitations inherent in the system.
For example, certain reactions of the ACC, in
certain circumstances, may be unexpected or
come late from the driver's point of view. So
pay attention in order to intervene if necessa-
ry.
For example, the following traffic situations
call for the utmost attention:
Starting driving after a stopping phase (only
vehicles with automatic gearbox)
After a stopping phase, the ACC may begin
driving automatically when the vehicle in
front drives off ››› .When the ACC halts the vehicle (e.g. traffic
j
am), the in
s

trument panel display shows the
ACC ready to start message. If the ve-
hicle ahead drives off again, the ACC will also
do so automatically.
If the vehicle ahead does not drive off again,
the vehicle can be kept indefinitely in the
ACC ready to start status by operating
the third lever repeatedly towards position 2
› ››
Fig. 211
or b
y pressing the brake pedal.
If the Press the brake message is shown
on the instrument panel, press the brake. If
you do not, an acoustic warning will be heard
and the ACC will switch to inactive mode
(Standby). At this point, the vehicle may be-
gin to move towards the stopped vehicle
ahead ››› .
Ov er
t

aking
When the turn signal lights up before the ve-
hicle begins an overtaking manoeuvre, the
ACC accelerates the vehicle automatically
and thus reduces the distance from the vehi-
cle in front.
When the vehicle enters the overtaking lane,
if the ACC does not detect another vehicle in
front, it accelerates until it reaches the pro-
grammed speed and maintains it.
System acceleration can be interrupted at
any time by pressing the brake or moving the
third lever backwards ››› page 218.
222

Driver assistance systems
Driving through a bend
On ent erin
g or e
xiting bends, the radar sen-
sor may no longer determine the vehicle in
front or react to a vehicle in the adjacent lane
››› Fig. 214 A. In these situations the vehicle
may brake unnecessarily or fail to react to re-
act to the vehicle in front. In this case, the
driver has to intervene by accelerating or in-
terrupting the braking process by applying
the brake or pushing the third lever back-
wards ››› page 218.
Driving in tunnels
When driving through tunnels the radar sen-
sor may be limited. Switch off the ACC in tun-
nels.
Narrow or misaligned vehicles
The radar sensor can only detect narrow or
misaligned vehicles when they are within
range ››› Fig. 214 B. This applies particularly
to narrow vehicles such as motorbikes. In
these cases, you should brake as necessary.
Vehicles with special loads and accessories
Special loads and accessories of other vehi-
cles that jut out over the sides, backwards or
over the top may be out of the ACC's range.
Switch off the ACC when driving behind vehi-
cles with special loads and accessories or
when overtaking them. In these cases, you
should brake as necessary. Other vehicles changing lanes
Vehicl
es changing lanes a short distance
away from your own can only be detected
when they are within range of the sensors.
Consequently, the ACC will take longer to re-
act ››› Fig. 215 C. In these cases, you should
brake as necessary.
Stationary vehicles
The ACC does not detect stationary objects
while driving, such as traffic tails or damaged
vehicles.
If a vehicle detected by the ACC turns or
moves over and there is a stationary vehicle
in front of it, the ACC will not react to it
››› Fig. 215 D. In these cases, you should
brake as necessary.
Vehicles driving in the opposite direction
and vehicles crossing your path
The ACC does not react to vehicles approach-
ing from the opposite direction or vehicles
crossing your path.
Metal objects
Metal objects, e.g. rails on the road or sheets
used in road works, can confuse the radar
sensor and cause the ACC to react wrongly. Factors that may affect how the radar sensor
operate
s
If laser sensor operation is impaired, due to
heavy rain, spray, snow or mud, the ACC is
deactivated temporarily. The relevant text
message will appear in the dash panel dis-
play. If necessary, clean the radar sensor.
When the radar sensor begins to operate
properly again, the ACC will automatically be
available again. The message on the instru-
ment panel screen will switch off and the ACC
will be reactivated again.
ACC operation may be affected by a strong ra-
dar reverse reflection, for example in a closed
car park.
Trailer mode
When driving with trailer the ACC controls
less dynamically.
Overheated brakes
If the brakes overheat, for example after
abrupt braking or in long and steep slopes,
the ACC may be deactivated temporarily. The
relevant text message will appear in the dash
panel display. In this case, adaptive cruise
control cannot be activated.
Adaptive cruise control can be reactivated
once brake temperature has cooled suffi-
ciently. The message will disappear from the
instrument panel display. If the message ACC
not available remains on for quite a long »
223
Technical data
Advice
Operation
Emergencies
Safety

Operation
time it means that there is a fault. Contact a
s pec
i
alised workshop. SEAT recommends vis-
iting a SEAT dealership. WARNING
If you do not heed the Press the brake
mes s

age, the vehicle may initiate an involun-
tary movement and could crash into the vehi-
cle ahead. In any event, before driving off,
check that the road is clear. The radar sensor
may not detect obstacles on the road. This
could cause an accident and serious injuries.
If necessary, apply the brake. Lane Assist system*
Intr oduction Fig. 216
In the windscreen: field of vision of
the Lane As s
i

st system camera. Using the camera located in the windscreen,
the Lane As
s
i

st system detects 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 move-
ment 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. Indications on the display and lamps Fig. 217
On the instrument panel display: In-
dic ation on the Lane As
s

ist system display
(example 1). 224

Driver assistance systems
If the remaining braking distance is suffi-
c ient, if
nec
essary the system slows down the
vehicle until it stops completely and auto-
matically switches on the electronic parking
brake ››› page 183.
Switching the Emergency Assist on and off
The Emergency Assist is switched on auto-
matically when the Lane Assist is switched on
››› page 224.
Technical requirements for using the Emer-
gency Assist
● The adaptive cruise control (ACC) must be
switc
hed on ››› page 214.
● The Lane Assist must be switched on
›››
page 224.
● The selector lever must be in the D/S posi-
tion or in the
Tiptronic selector gate.
● The system must have detected a lane sep-
aration line on both side
s of the vehicle
››› Fig. 218.
The following conditions may cause the
Emergency Assist not to react or to switch off
automatically:
● If the driver accelerates, brakes or moves
the steerin
g wheel.
● If any of the conditions mentioned in
›››
page 229, Technical requirements for us-
ing the Emergency Assist are not fulfilled.●
If any
of the conditions required for opera-
tion of the Lane Assist are not met
››› page 224.
● If any of the conditions necessary for the
adaptiv
e cruise control (ACC) to work are no
longer fulfilled ››› page 214. WARNING
The smart technology incorporated into the
Emerg ency

Assist cannot overcome the limits
imposed by the laws of physics; it only works
within the limits of the system. The driver is
responsible for driving the vehicle.
● Adapt your speed and safe distance to the
vehicl
e in front of you at all times to suit the
visibility, weather, road and traffic condi-
tions.
● Keep your hands on the wheel at all times
to be re
ady to intervene in the steering at any
time.
● The Emergency Assist alone cannot always
avoid acc
idents or serious injuries.
● If the operation of the Emergency Assist is
impaired, f
or example if the radar sensor of
the adaptive cruise control (ACC) or the Lane
Assist camera are covered or have lost their
settings, the system may intervene inoppor-
tunely in braking or in steering.
● The Emergency Assist does not react to
people or anim
al or vehicles crossing your
path or which approach you head-on in the
same lane. WARNING
If the Emergency Assist Intervenes inoppor-
tu nely

, serious accidents and injuries may oc-
cur.
● If the Emergency Assist does not operate
properly, sw
itch off the Lane Assist
››› page 224. Doing so will also switch off the
Emergency Assist.
● Have the system checked by a specialised
workshop
. SEAT recommends visiting a SEAT
dealership for this. Note
● Autom atic

interventions by the Emergency
Assist on the brakes may be interrupted by
pressing the accelerator or brake or by mov-
ing the wheel.
● Hazard warning lights that come on auto-
matica
lly can be switched off by pressing the
accelerator or the break, moving the steering
wheel or pressing the hazard warning light
switch.
● If this occurs, the Emergency Assist may
deceler
ate the vehicle until it comes to a com-
plete stop.
● When the Emergency Assist is activated, it
is on
ly available again after the ignition has
been switched off and back on again. 229
Technical data
Advice
Operation
Emergencies
Safety

Operation
Automatic activation
 on
– activ
at
es the Automatic activa-
tion option ››› page 240.
 off – deactivates the Automatic ac-
tivation option ››› page 240.
Front volume*
Volume in the front and rear area.
Front sound settings/sharpness*
Frequency (tone) of the sound in the front
area.
Rear volume*
Volume in the rear area.
Rear sound settings/sharpness*
Frequency (tone) of the sound in the rear
area.
Adjust volume
With the parking aid switched on, the active
audio/video source volume will be reduced
to the intensity of the selected setting.
Error messages When the Parking Aid is activated or when it
i
s
sw

itched on, if a message reporting a Park- ing aid error is displayed on the instrument
panel, there i

s a fault in the system.
If the fault doesn't disappear before discon-
necting the ignition, next time that parking
aid is engaged in reverse, it will not be indi-
cated.
Parking System Plus*
If there is a fault in the parking aid system a
message will appear on the instrument panel
indicating the error. In addition the  key
LED will blink.
If there is a fault in a sensor, the symbol  is
displayed on the Easy Connect display in
front of/behind the vehicle. If a rear sensor is
faulty, only the obstacles in the areas A and
B are displayed
››
›
Fig. 225. If a front sensor
is faulty, only the obstacles in the areas C and
D are displayed.
Hav e the f
au

lt corrected by a specialised
workshop without delay.
Towing bracket In vehicles equipped with a towing bracket
dev
ic
e fr

om the factory, when the trailer is
connected electrically, the Parking Aid rear
sensors will not be activated when reverse
gear is engaged, when the selector lever is
turned to position R or when the button  is
pressed. Parking System Plus
The dist

ance to possible obstacles at the rear
of the vehicle will not be displayed on the
screen and nor will it be indicated by means
of audible sound signals.
The Easy Connect system screen will only dis-
play objects detected at the front, and the ve-
hicle's trajectory will be hidden.
Braking while manoeuvring function* 3 Only
valid with Parking System Plus
As
soon as an obstacle is detected while re-
versing, the braking while manoeuvring func-
tion activates the emergency braking. De-
pending on the equipment, the braking while
manoeuvring function can also activate
emergency braking while moving forwards.
The emergency braking function is used to
minimise collisions. Vehicle speed must not
be higher than 10 km/h.
The braked manoeuvre function is active or
inactive when the parking light is lit or off, re-
spectively. If an emergency braking is activa-
ted, the function will remain inactive until the
gear is changed.
The Parking System’s limitations apply.
The braking while manoeuvring function is
controlled in the Easy Connect system with
242

Advice
Automatic car washes
B ef
or
e going through a car wash, be sure to
take the usual precautions (closing the win-
dows, roof and rear-view mirrors). If the vehi-
cle has special accessories such as spoilers
or a roof rack or two-way radio aerial, etc., it
is advisable to consult the car wash tunnel
operator.
It is best to use a car wash without revolving
bristles if possible.
Washing the vehicle with a high pressure
cleaner
When washing the vehicle with a high-pres-
sure cleaner, always follow the operating in-
structions for the equipment. This applies
particularly to the operating pressure and the
spraying distance. Do not hold the nozzle too
close to soft materials such as rubber hoses
or seals. The same applies to the parking aid
sensors*, which are located in the rear bump-
er.
Do not use a nozzle that sprays the water out
in a direct stream or one that has a rotating
jet for forcing off dirt.
Factory-fitted adhesive sheets
The following indications should be taken in-
to account to avoid damaging adhesive
sheets:
● Do not use high pressure cleaners. ●
Do not use s crapers to remove ice or snow
from the sheets.
● Do not polish the adhesive sheets.
● Do not use dirty cloths or sponges.
● It is preferable to wash them with a soft
spong
e and gentle neutral soap.
Washing the car by hand
When washing the car by hand, use plenty of
water to soften the dirt first, and rinse off as
well as possible.
Then clean the vehicle with a soft sponge,
glove or brush using only slight pressure.
You should start on the roof and work down.
Special car soap should only be used for very
persistent dirt.
Rinse the sponge or glove thoroughly and of-
ten.
Wheels, sills and similar should be cleaned
last. Use a second sponge for this. WARNING
● The v ehic

le should only be washed with the
ignition switched off. Failure to follow this in-
struction could result in an accident.
● Do not clean the underside of chassis, the
inside of
wheel arches or wheel trims without
protecting your hands and arms. You may cut
yourself on sharp-edged metal parts. Other-
wise, there is a risk of sustaining cuts. ●
When wa shin

g the car during the winter
season: water and ice in the brake system
can reduce braking effectiveness: risk of acci-
dent! CAUTION
● Do not wa

sh the vehicle in direct sunlight –
otherwise the paint can be damaged.
● Do not use sponges, abrasive household
spong
es or similar to clean insect remains.
This could damage the surface.
● Clean off stubborn dirt (insects, etc.) from
the headlight
s at regular intervals, for in-
stance when filling the fuel tank. The head-
lights should only be washed with water, do
not wipe them with a dry cloth or sponge. It
is best to use soapy water.
● Never wash tyres with a jet that sprays the
water out
in a direct stream. This could dam-
age the tyres even if the spray is kept at a
distance and only used for a very short time.
● Before washing the vehicle in an automatic
car wa
sh, please make sure to retract the ex-
terior mirrors to prevent them from being
damaged. Electrically retractable exterior
mirrors must not be folded in or out by hand,
always use the electrical power control. CAUTION
● Bef or

e washing the vehicle in an automatic
car wash, please proceed as follows to lock
the wiper arms so that they are not moved to-
wards the top of the windscreen: 258

Index
Index
A
A C
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
radar sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 159, 256
Adaptive cruise control . . . . . . . . . . . . . . . . . . . . 214 function for preventing overtaking in an insidelane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
indications on the display . . . . . . . . . . . . . . . . 216
malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
radar sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
special driving situations . . . . . . . . . . . . . . . . . 222
warning and control lamp . . . . . . . . . . . . . . . . 216
Adaptive Cruise Control deactivating temporarily . . . . . . . . . . . . . . . . . 221
operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Additional consumers (efficiency program) . . . . . 43
Adjusting front head restraints . . . . . . . . . . . . . . . . . . . . . . 78
front seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
rear head restraints . . . . . . . . . . . . . . . . . . . . . 153
seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Adjusting the head restraints front head restraints . . . . . . . . . . . . . . . . . . . . . 153
Adjustment CAR menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
front head restraints . . . . . . . . . . . . . . . . . . . . . 153
rear head restraints . . . . . . . . . . . . . . . . . . . . . . 78
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . 22, 85 activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 deactivation of front airbag . . . . . . . . . . . . . . . . 89
desc
ription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
front airbags . . . . . . . . . . . . . . . . . . . . . . . . . 22, 87
functioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
head-protection airbags . . . . . . . . . . . . . . . 24, 88
knee airbags . . . . . . . . . . . . . . . . . . . . . . . . . 23, 87
side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 24, 87
Air conditioning Climatronic . . . . . . . . . . . . . . . . . . . . . . . . 52, 173
heating and fresh air . . . . . . . . . . . . . . . . . . . . . 56
manual air conditioning . . . . . . . . . . . . . . . . . . . 54
user instructions . . . . . . . . . . . . . . . . . . . . . . . . 175
Air outlets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Air recirculation . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Alcantara: cleaning . . . . . . . . . . . . . . . . . . . . . . . 263
Anchoring the front tow line. . . . . . . . . . . . . . . . . . . . . . . . . 99
Anti-freeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Anti-locking system . . . . . . . . . . . . . . . . . . . . . . . 187
Anti-puncture . . . . . . . . . . . . . . . . . . . . . . . . . . 65, 95
Anti-puncture kit . . . . . . . . . . . . . . . . . . . . . . . . 65, 95 check after 10 minutes . . . . . . . . . . . . . . . . . . . . 97
Anti-puncture set . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Anti-theft alarm . . . . . . . . . . . . . . . . . . . . . 125, 133 trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
vehicle interior monitoring and anti-tow pro-tection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Anti-theft security system . . . . . . . . . . 15, 125, 131
Anti-tow protection . . . . . . . . . . . . . . . . . . . . . . . 135
Aspects to note before setting off . . . . . . . . . . . . . 74
ASR see Traction control system . . . . . . . . . . . . . . . 187
Assistance systems ACC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
adaptive cruise control . . . . . . . . . . . . . . . . . . . 214
Auto Hold function . . . . . . . . . . . . . . . . . . . . . . 208
cruise control system . . . . . . . . . . . . . . . . . . . . 209
Emergency Assist . . . . . . . . . . . . . . . . . . . . . . . 228 emergency brake assist (Front Assist) . . . . . . . 210
fatigue detection
. . . . . . . . . . . . . . . . . . . . . . . 236
parking aid . . . . . . . . . . . . . . . . . . . . . . . 237, 238
traffic jam assist . . . . . . . . . . . . . . . . . . . . . . . . 227
traffic sign detection system . . . . . . . . . . . . . . 233
tyre monitoring . . . . . . . . . . . . . . . . . . . . . . . . . 284
tyre monitoring indicator . . . . . . . . . . . . . . . . . 285
tyre monitoring systems . . . . . . . . . . . . . . . . . 283
Assisted starting . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Audible warning signal control and warning lamps . . . . . . . . . . . . . . . 119
lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
unfastened safety belt . . . . . . . . . . . . . . . . . . . . 80
Auto Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Auto Hold function . . . . . . . . . . . . . . . . . . . . . . . . 208
Auto Lock (central locking) . . . . . . . . . . . . . . . . . 125
Automatic car washes switching the Auto Hold function off . . . . . . . . 209
Automatic dipped beam control . . . . . . . . . . . . . 141
Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . . . 191 downhill speed control . . . . . . . . . . . . . . . . . . 196
driving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
emergency program . . . . . . . . . . . . . . . . . . . . . 197
kick-down feature . . . . . . . . . . . . . . . . . . . . . . . 195
launch control program . . . . . . . . . . . . . . . . . . 195
manual release of the selector lever . . . . . . . . . 50
safety interlock for ignition key . . . . . . . . . . . . 178
selector lever lock . . . . . . . . . . . . . . . . . . . . . . . 192
selector lever positions . . . . . . . . . . . . . . . . . . 191
steering wheel with gear shift paddles . . . . . . 193
tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . 191, 193
AUX-IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
B Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Before setting off . . . . . . . . . . . . . . . . . . . . . . . . . . 74
315