2017 Seat Leon 5D warning

Driver assistance systems
Function for preventing overtaking in
an in s
ide l
aneFig. 213
On the instrument panel display:
A C
C

active, vehicle detected in an outer lane. The adaptive cruise control (ACC) has a func-
tion th
at
help

s avoid overtaking while driving
in inside lanes at certain speeds.
If another vehicle is detected travelling at a
slower speed in an outer lane, it is displayed
on the multifunction display ››› Fig. 213.
To avoid overtaking while driving in an inside
lane the system will gently brake, and in ac-
cordance with the speed will prevent the car
from overtaking. The driver can override this
function at any time. Deactivating the Adaptive Cruise Con-
trol

ACC temporarily in certain situa-
tions In the following situations the Adaptive
Crui
se C

ontrol (ACC) should be deactivated
due to the system's limitations ››› :
● When changing lanes, on tight bends and
rou nd

abouts, in acceleration and decelera-
tion lanes on motorways or in sections with
road works to prevent involuntary accelera-
tion to reach the programmed speed.
● When going through a tunnel, as operation
cou l

d be affected.
● On roads with several lanes, when other ve-
hicle
s are driving more slowly in the overtak-
ing lane. In this case, slower vehicles will be
overtaken on the right.
● In case of heavy rain, snow or spray, as the
vehicl
e in front might not be detected proper-
ly or, in certain circumstances, might not be
detected at all. WARNING
If the ACC does not switch off in the situa-
tions de

scribed, serious accidents and inju-
ries may occur.
● Always switch off the ACC in critical situa-
tions. Note
If you do not switch off the ACC in the afore-
mentioned sit uation

s, you may commit a le-
gal offence. 221
Technical 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

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
Fig. 218
On the instrument panel display: In-
dic ation on the Lane As
s
ist system display
(example 2). Status display
The sy s
t

em is active, but not available,
either because the minimum speed has
not been reached or because the lane
lines are not recognised ››› Fig. 217 A.
The system is active and available, both
lane lines are recognised. The steering
angle is not being corrected at this mo-
ment ››› Fig. 217 B.
–
– The system is operational, the highligh-
ted line
A indicates that there was a
ri sk
of

involuntarily crossing the lane
line and that the steering is being adjus-
ted to correct the angle ››› Fig. 218 C.
The two highlighted lines A light up si-
mu lt
aneou

sly when both lane lines are
recognised and the Lane Assist function
is active ››› Fig. 218 D.
Control lamps 
It lights up yellow: Lane Assist active
but not available.
The system can not accurately recognise the lane.
Please see page 226, the Lane Assist system is not
available (the control lamp is lit up yellow). 
It lights up green
Lane Assist system active and available.
WARNING
Observe the safety warnings ›››
in Warning
and contr o
l lamps on page 119. Operating mode
Steering wheel vibration
The f
ol

lowing situations can cause vibration
in the steering wheel and require the driver
to take active control of driving: –
– ●
When the steerin
g angle assist value re-
quired to keep the vehicle in the lane is high-
er than the system’s maximum operating val-
ue.
● If the system ceases to display the lane
lines whi
le assisting with steering.
Switching the Lane Assist system on or off
Through the Easy Connect system
● Press the Easy Connect button  ●
Press the S
ET
TINGS function button
● Press the function button Driv
er a
s
sistance to
open the menu.
OR: U s
in
g the Driving Assist button on
the turn signal lever* ›››
 page 37.
Lane Assist with Lane Centring Guide
The Lane Centring Guide function is in-
tended to keep the vehicle in the centre of
the lane.
If the driver has a tendency to veer slightly off
centre in the lane, the system adapts to driv-
er preferences.
The Lane Centring Guide function is ac-
tivated/deactivated in the Easy Connect sys-
tem using the  button and the
S
ET
TINGS function button
›
››

page 120. »
225
Technical data
Advice
Operation
Emergencies
Safety

Operation
Self-deactivation: the Lane As s
i st system can
be automatically deactivated if there is a sys-
tem malfunction. The control lamp
disappears.
Hands-Off Function
● In the absence of steering wheel activity
the syst
em alerts the driver with acoustic sig-
nals and a text message on the dash panel
asking to actively take over the steering.
● If the driver does not react to this, the sys-
tem also al
erts the driver with a little shaking
motion through the brakes and, if the vehicle
has it, activates the Emergency Assist func-
tion ››› page 228.
● In vehicles without Emergency Assist, the
adaptiv
e lane guidance function will be disa-
bled after the corresponding warnings to the
driver.
The lane assist system is active but it is not
available (the control lamp is lit up yellow)
● When driving at speeds below 65 km/h (38
mph).
● When the Lane Assist system does not de-
tect the div
iding lines of the road. For exam-
ple, in the event warnings indicating road
works, and snow, dirt, moisture or reflec-
tions.
● When the radius of a curve is too small.
● When no road markings can be seen. ●
When the dist
ance to the next marking to
too great.
● When the system does not detect any clear
and active st
eering movement during a long
period of time.
● Temporarily, in the event of very dynamic
driving s
tyles.
● If a turn signal is activated.
● With the stability control system (ESC) in
Sport
mode or switched off.
Switching off the Lane Assist system in the
following situations
Due to the limits of the Lane Assist system,
switch it off in the following situations:
● When more attention is required of the
driver
● When drivin

g in a sporty style
● In unfavourable weather conditions
● On roads in poor condition
● In areas of road works WARNING
The intelligent technology in the Lane Assist
sys t

em cannot change the limits imposed by
the laws of physics and by the very nature of
the system. Careless or uncontrolled use of
the Lane Assist system may cause accidents
and injury. The system is not a replacement
for driver awareness. ●
Alw a

ys adapt your speed and the distance
to the vehicles ahead in line with visibility,
weather conditions, the condition of the road
and the traffic situation.
● Always keep your hands on the steering
wheel so it c
an be turned at any time.
● The Lane Assist system does not detect all
roa
d markings. The road surfaces, road struc-
tures or objects in poor condition can be in-
correctly detected as road markings under
certain circumstances by the Lane Assist sys-
tem. In such situations, switch the Lane As-
sist system off immediately.
● Please observe the indications on the in-
strument p
anel and act as is necessary.
● Always pay attention to the vehicle's sur-
roundin
gs.
● When the area of vision of the camera be-
comes
dirty, covered or is damaged, the Lane
Assist system function can be affected. CAUTION
In order to avoid influencing the operation of
the sys t

em, the following points must be tak-
en into account:
● Regularly clean the area of vision of the
camera and k
eep it in a clean state, without
snow or ice.
● Do not cover the area of vision of the cam-
era.
● Check

that the area of vision of the wind-
scr
een camera is not damaged. 226

Driver assistance systems
Note
● The Lane Ass i
st system deactivates when
driving below 60 km/h (37 mph).
● The lane departure warning system has
been exc
lusively developed for driving on
paved roads only.
● If the Lane Assist system does not work as
desc
ribed in this chapter, do not use it and
contact a specialised workshop.
● Before starting a journey, verify that the
field of
vision of the camera is not covered
››› Fig. 216.
● Always keep the field of vision of the cam-
era cl
ean.
● If there is a fault in the system, have it
check
ed by a specialised workshop. Traffic Jam Assist
R el
at

ed video Fig. 219
Safety Description and operation
Traffic Jam Assist helps the driver keep the
car w
ithin its

lane and to move in convoy in
case of traffic congestion or slow traffic.
Traffic Jam Assist is an additional function of
Lane Assist ››› page 224 and combines Lane
Assist functions with Adaptive Cruise Control
(ACC) ››› page 214. Therefore, it is essential
that you read these two chapters carefully
and note the limitations of the systems and
the information about them.
Operation of Traffic Jam Assist
At speeds of below 60 km/h (40 mph), Traffic
Jam Assist can maintain a (temporary) dis-
tance preset by the driver with respect to the
vehicle ahead and help stay within the lane
››› .
T o do thi
s, the sy

stem automatically controls
the accelerator, brakes and steering, and
slows the vehicle, stopping it fully if neces-
sary, when faced with a vehicle in front that
has stopped. It automatically moves off again
when the vehicle ahead moves.
Traffic Jam Assist is designed only for use on
motorways and wide roads. Therefore, never
use it in city traffic. Technical requirements for using Traffic Jam
Assi

st
● Lane departure warning must
be activated:
 button > SETTINGS > Driver as-
sistance > Lane departure warning
(Lane Assist) › ›
›
 page 33.
● The Lane Centring Guide must be activated:
 button > SETTINGS > Driver as-
sistance > Lane departure warning
(Lane Assist)
● Adaptive Cruise Control (ACC) must be con-
nect ed and activ
e ›

›› page 218.
● The speed must be below 60 km/h
(38 mph).
Traffic

Jam Assist is not active (the Lane As-
sist control light turns yellow)
● If any of the conditions mentioned on
page 227, T
echnical requirements for using
Traffic Jam Assist are no longer met.
● If any of the conditions required for opera-
tion of the Lane Ass
ist 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.
Situations in which Traffic Jam Assist must
be switched off
Due to the limitations of the system, Traffic
Jam Assist must always be switched off in the
following situations: »
227
Technical data
Advice
Operation
Emergencies
Safety

Operation
● When mor e att
ention i
s required by the
driver.
● When driving in a very sporty style.
● In adverse weather conditions, e.g. in case
of sno
w or heavy rain.
● When driving on roads in poor condition.
● In sections with roadworks.
● In city journeys. WARNING
The smart technology incorporated into Traf-
fic Jam As s

ist cannot defy the laws of phys-
ics; it only works within the limits of the sys-
tem. Accidents and severe injury may occur if
Traffic Jam Assist is used negligently or invol-
untarily. The system is not a replacement for
driver awareness.
● 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.
● Do not use Traffic Jam Assist in city jour-
neys.
● Do not u

se Traffic Jam Assist if there is poor
vis
ibility, for example, in case of snow, ice,
rain or loose gravel, or on steep or slippery
sections or flooded roads.
● Do not use Traffic Jam Assist offroad or on
roa
ds where the surface is not firm. Traffic
Jam Assist has been designed for use on
paved roads only. ●
Traffic

Jam Assist does not react to people
or animals or vehicles crossing your path or
that approach you head-on down the same
lane.
● If Traffic Jam Assist does not reduce speed
sufficiently
, brake the vehicle immediately by
applying the pedal.
● If the vehicle continues to move when you
wish it
to stop after a driver intervention
prompt, brake the vehicle by applying the
pedal.
● If driver intervention is requested on the
da
sh panel display, immediately resume con-
trol of the vehicle.
● Keep your hands on the wheel at all times
to be re
ady to intervene in the steering at any
time. The driver is always responsible for
keeping the vehicle in its own lane.
● Always be prepared to take charge of driv-
ing (acc
elerating or braking) yourself. Note
● If T

raffic Jam Assist does not work as de-
scribed in this chapter, stop using it and con-
tact a specialised workshop.
● If the system is faulty, take it to a special-
ised work
shop and have it checked. Emergency Assist
D e
s

cription and operation Emergency Assist detects whether there is in-
activity
b

y the driver and can automatically
keep the car within the lane and stop it alto-
gether if necessary. This way the system can
actively help avoid an accident.
Emergency Assist is an additional function of
Lane Assist ››› page 224 and combines Lane
Assist functions with Adaptive Cruise Control
(ACC) ›››
page 214. Therefore, it is essential
that you read these two chapters carefully
and note the limitations of the systems and
the information about them.
Operation of Emergency Assist
Emergency Assist detects when the driver
ceases to perform any activity and repeatedly
requests that he/she regain active control of
the vehicle, through the use of optical and
acoustic warnings and by applying the
brakes.
If the driver continues to do nothing, the sys-
tem automatically takes over the accelerator,
brakes and steering in order to brake the ve-
hicle and keep it in its lane ››› . When the
Emer g
ency

Assist is actively adjusting, the
hazard warning lights come on ›››
page 145
and the vehicle makes slight zigzag move-
ments in the lane in order to warn other driv-
ers.
228

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