2017 Seat Leon SC warning

Driver assistance systems
The Auto Hold function is automatically
t urned off
if
the following conditions are
met:
Manual gearboxAutomatic gearbox
1.
If any of the conditions mentioned on
››› page 208, Conditions for keeping the vehicle
stationary with the Auto Hold function are no lon- ger met.
2.If the engine is running irregularly or an anomalyis detected.
3.If the engine is turnedoff or stalls.If the engine is switch- ed off.
4.The clutch and the ac-
celerator are pressed at the same time.If the accelerator is pressed.
5.
If any of the tyres hasonly minimal contact
with the ground, e.g. in the case of axle articu- lation. WARNING
The smart technology incorporated into the
Auto Ho l

d function cannot defy the laws of
physics; it only works within the limits of the
system. The greater convenience provided by
the Auto Hold function should never tempt
you to take any risk that may compromise
safety.
● Never leave the vehicle running and with
the Auto Hol
d function switched on. ●
The Auto Ho l

d function cannot always keep
the vehicle stationary uphill or downhill or
stop it sufficiently, for example, on slippery
or frozen surfaces. Note
Before entering a car wash, always switch off
the Aut o Hol

d function, because if the elec-
tronic parking brake is automatically connec-
ted, it may cause damage. Cruise control system (CCS)*
Oper ation Fig. 203
Instrument panel display: CCS status
indic ation s. Read the additional information carefully
› ›
›

 page 45
The cruise control system (CCS) is able to
maintain the set speed from 20 km/h (15
mph).
The CSS only reduces vehicle speed by ceas-
ing to accelerate, not by actively braking the
vehicle ››› .
C ontr
o

l lamp
When the warning lamp  is lit, cruise con-
trol is active.
Several warning and control lamps light up
for a few seconds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds.
Displayed on the CCS screen
Status Fig. 203:
CCS temporarily switched off. The set
speed is displayed in small figures.
System error. Contact a specialised work-
shop.
CCS switched on. The speed memory is
empty.
The CCS is switched on. The set speed is
displayed in large figures. »
A B
C
D
209
Technical data
Advice
Operation
Emergencies
Safety

Operation
WARNING
Use of the cruise control could cause acci-
dents and sev
ere injuries if it is not possible
to drive at a constant speed maintaining the
safety distance.
● Do not use the cruise control in heavy traf-
fic, if the dis
tance from the vehicle in front is
insufficient, on steep roads, with several
bends or in slippery circumstances (snow,
ice, rain or loose gravel), or on flooded roads.
● Never use the CCS when driving off-road or
on unpav
ed roads.
● Always adapt your speed and the distance
to the v
ehicles ahead in line with visibility,
weather conditions, the condition of the road
and the traffic situation.
● To avoid unexpected operation of the cruise
contro
l system, turn it off every time you fin-
ish using it.
● It is dangerous to use a set speed which is
too high for the pr
evailing road, traffic or
weather conditions.
● When travelling down hills, the CCS cannot
maintain a c
onstant speed. The vehicle tends
to accelerate under its own weight. Select a
lower gear or use the foot brake to slow the
vehicle. WARNING
Observe the safety warnings ›››
in Warning
and contr o
l lamps on page 119. Operating the cruise control system*
Read the additional information carefully
›› ›

 page 45
The value indicated in the table in brackets
(in mph, miles per hour) only refers to instru-
ment panels with indications in miles.
Changing gear in CCS mode
The CCS decelerates as soon as the clutch
pedal is pressed, intervening again automati-
cally after a gear is engaged.
Travelling down hills with the CCS
When travelling down hills the CCS cannot
maintain a constant speed. Slow the vehicle
down using the brake pedal and reduce
gears if required.
Automatic off
The cruise control system (CCS) is switched
off automatically or temporarily:
● If the system detects a fault that could af-
fect the w

orking order of the CCS.
● If you press and maintain the accelerator
pedal f
or a certain time, driving faster than
the stored speed.
● If the dynamic driving control systems in-
terv
ene (e.g. ASR or ESC).
● If the airbag is triggered. Emergency brake assist system
(Front As

sist)*
Topic introduction Fig. 204
On the instrument panel display:
pr e-w
arnin

g messages. The objective of the emergency brake assist
sy
s
t

em is to prevent head-on collisions
against objects that may be in the vehicle’s
path or minimise the consequences of such
impacts.
Within the limitations imposed by the envi-
ronmental conditions and by the system it-
self, the function acts in staggered fashion,
depending on how critical the situation is. In-
itially it warns the driver, and if the driver’s
reaction does not occur or is insufficient, it
activates an independent emergency brak-
ing.
210

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

Operation
●
The Front As
sist does not react to animals
or vehicles crossing your path or approaching
head-on down the same lane.
● The Front Assist does not react to pedes-
trians
walking in the same direction or ap-
proaching head-on down the same lane.
● The driver must always be ready to take
over the c
ontrol of the vehicle.
● When the Front Assist causes a braking,
the brake ped
al is “harder”.
● Automatic interventions by the Front Assist
on the brake
s may be interrupted by pressing
the clutch, accelerator or moving the wheel. Note
● When the Front As

sist is connected, the in-
dications on the instrument panel screen may
be concealed by warnings from other func-
tions, such as an incoming call.
● When the Front Assist causes a braking,
the brake ped
al is “harder”.
● Automatic interventions by the Front Assist
on the brake
s may be interrupted by pressing
the clutch, accelerator or moving the wheel.
● The Front Assist may brake the vehicle until
it st
ops completely. However, the brake sys-
tem does not halt the vehicle permanently.
Use the foot brake!
● If the Front Assist does not work as descri-
bed in this c
hapter (e.g. in intervenes several
times unnecessarily), switch it off. Have the
system checked by a specialised workshop.
SEAT recommends visiting a SEAT dealership. Radar sensor
Fig. 205
On the front bumper: radar sensor. A radar sensor is installed on the front bump-
er t
o det
ermine the tr

affic situation
››› Fig. 205 1 .
The r a
d

ar sensor's visibility may be impaired
by dirt, mud or snow, or by environmental in-
fluences such as rain or mist. In this case, the
Front Assist does not work. The instrument
panel displays the following message:
Front Assist: No sensor vision! If
necessary clean the radar sensor ››› .
When the r a
d

ar sensor begins to operate
properly again, the Front Assist will automati-
cally be available again. The message will
disappear from the instrument panel display.
Front Assist operation may be affected by a
strong radar reverse reflection. This may oc-
cur, for example, in a closed car park or due to the presence of metallic objects (e.g. rails
on the roa

d or sheets used in road works).
The area in front of and around the radar sen-
sor should not be covered with adhesives,
additional or similar headlights, as this may
negatively affect Front Assist operation.
If the front of the vehicle is not properly re-
paired or structural modifications are made
to it, for example if the suspension is low-
ered, Front Assist operation may be affected.
SEAT recommends visiting a SEAT dealership
for this purpose. CAUTION
If you have the sensation that the radar sen-
sor is d

amaged or has lost its settings, dis-
connect the Front Assist. This will avoid pos-
sible dangerous situations caused by a sys-
tem malfunction. If this occurs have it adjus-
ted.
● The sensor may become damaged or lose
its settin
gs when knocked, for example, dur-
ing a parking manoeuvre. This may compro-
mise the system's efficacy or disconnect it.
● Repairs to the radar sensor require special-
ist
knowledge and special tools. SEAT recom-
mends visiting a SEAT dealership for this pur-
pose.
● A registration plate or plate holder on the
front th
at is larger than the space for the reg-
istration plate, or a registration plate that is
curved or warped can cause the radar to mal-
function. 212

Driver assistance systems
●
Cle
an away the snow with a brush and the
ice preferably with a solvent-free de-icer
spray. Operating the Emergency braking as-
si
s

tance system (Front Assist) Fig. 206
On the instrument panel display:
Fr ont
As

sist switched off message. The Front Assist is active whenever the igni-
tion i
s
sw

itched on.
When the Front Assist is switched off, so too
are the advance warning function (pre warn-
ing) and the distance warning.
SEAT recommends leaving the Front Assist al-
ways switched on. Exceptions ››› page 213,
Switching the Front Assist off temporarily in
the following situations. Switching the Front Assist on and off
With the ignition swit

ched on, the Front As-
sist can be switched on and off as follows:
● Select the corresponding menu option us-
ing the butt
on for the driver assistance sys-
tems ›››
 page 36.
● OR: switch the system on and off in Easy
Connect
using the  button and the
S ET
TINGS and
Driv
er a
s
sistance function but-
t on
s
›››
 page 33.
When Front Assist is switched off, the instru-
ment panel will inform that it has been
switched off with the following indicator 
››› Fig. 206.
Activating or deactivating the pre-warning
(advance warning)
The pre-warning function (advance warning)
can be switched on or off in the Easy Connect
system with the  button and the
S
ET
TINGS and
Driv
er a
s
sistance function buttons
› ›
›
 page 33.
The system will store the setting for the next
time the ignition is switched on.
SEAT recommends keeping the pre-warning
function switched on at all times.
Depending on the infotainment system in-
stalled in the vehicle, the advance warning
function may be adjusted as follows:
● Advance ●
Medium
● Del

ayed
● Deactivated
SEAT r
ecommends driving with the function
in “Medium” mode.
Switching distance warning on and off
If the safe distance with regard to the vehicle
in front is exceeded, the relevant warning will
appear on the instrument panel display
. In this case, increase the safe dis-
tance.
The distance warning can be switched on and
off in the Easy Connect system using the  button and the
S
ET
TINGS and
Driv er a
s

sistance function buttons
› ›
›
 page 33.
The system will store the setting for the next
time the ignition is switched on.
SEAT recommends keeping the distance
warning switched on at all times.
Switching the Front Assist off tempo-
rarily
in the following situations In the following situations the Front Assist
shou
l
d be de

activated due to the system's
limitations:
● When the vehicle is to be towed. »
213
Technical data
Advice
Operation
Emergencies
Safety

Driver assistance systems
(18 and 150 mph) and to select the distance
r equir
ed w
ith regard to the vehicle in front.
The ACC will adapt the vehicle's cruise speed
at all times, maintaining a safe distance with
the vehicle in front based on its speed.
When driving behind another vehicle, the
ACC function reduces speed until it is the
same as that of the vehicle ahead and main-
tains the set distance between the vehicles.
If the vehicle ahead accelerates, the adaptive
cruise control also accelerates, going no
higher than the target speed programmed.
If the vehicle is equipped with automatic
gearbox, the ACC can brake the vehicle until
it stops completely if a vehicle in front of it
stops.
The distance programmed should be in-
creased when the road surface is wet.
Driver intervention prompt
During driving, the ACC is subject to certain
limitations inherent in the system. In other
words, in certain circumstances the driver will
have to adjust speed him or herself, as well
as the distance from other vehicles.
In this case, the instrument panel screen will
warn you to intervene by applying the brake
and a warning tone will be heard
››› page 216. WARNING
The intelligent technology in the ACC cannot
ov er

come the system's inherent limitations
or change the laws of physics. If used negli-
gently or involuntarily, it may cause serious
accidents and injuries. The system is not a re-
placement for driver awareness.
● 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.
● Do not use the ACC when visibility is bad,
on steep r
oads, with several bends or in slip-
pery circumstances such as snow, ice, rain or
loose gravel, or on flooded roads.
● Never use the ACC when driving off-road or
on unpav
ed roads. The ACC has been de-
signed for use on paved roads only.
● The ACC does not react on approaching a
fixed o
bstacle, such as the tail of a traffic
jam, a damaged vehicle or a vehicle stopped
at the traffic lights.
● The ACC only reacts to people if a pedes-
trian monitorin
g system is available. In addi-
tion, the system does not react to animals or
vehicles crossing your path or approaching
head-on down the same lane.
● If the ACC does not reduce speed sufficient-
ly, brak
e the vehicle immediately by applying
the pedal.
● If you are driving using the spare wheel,
the ACC
system could automatically switch
off during the journey. Switch off the system
when starting off. ●
If the v

ehicle continues to move involuntar-
ily after a driver intervention prompt, brake
the vehicle by applying the pedal.
● If the dash panel displays a driv
er interven-
tion prompt, adjust the distance yourself.
● The driver should be ready to accelerate or
brake b
y him/herself at all times. CAUTION
If you have the sensation that the radar sen-
sor i s d

amaged, disconnect the ACC. This will
avoid possible damage. If this occurs have it
adjusted.
● Repairs to the radar sensor require special-
ist
knowledge and special tools. SEAT recom-
mends visiting a SEAT dealership for this pur-
pose. Note
● If the A C

C system does not work as descri-
bed in this chapter, do not use it until it has
been checked by a specialised workshop.
SEAT recommends visiting a SEAT dealership
for this purpose.
● Maximum speed with the ACC activated is
limited to 210 km/h (150 mph).
● When the A

CC is switched on, strange
noises
may be heard during automatic brak-
ing cause by the braking system. 215
Technical data
Advice
Operation
Emergencies
Safety

Operation
Indications on the display, warning
and c ontr
o
l lampsFig. 209
On the instrument panel display: (A)
A C
C

inactive (Standby). (B) ACC active. Status display
Indic
ation
s

on the display ››› Fig. 209:
Vehicle ahead detected. ACC is not active
and is not regulating your speed.
Distance from the vehicle ahead. ACC is
not active and is not regulating your dis-
tance.
1 2 Vehicle ahead detected. ACC is active and
i
s
r

egulating your speed.
Distance level 2 set by the driver.
ACC is active and is regulating your dis-
tance based on speed.
Warning and control lamps
››› in Warning and control lamps on
p ag
e 119

. 
The speed reduction by the ACC to
maintain the distance from the vehi-
cle in front is not sufficient.
Brake! apply the foot brake! Driver intervention prompt.

The ACC is not currently available.
a)
With the vehicle stationary, switch off the engine and
start it up again. Check the SEAT badge area on the front
››› Fig. 210 (in case it is dirty or icy or it has been hit). If
it is still unavailable, refer to a specialised workshop to
have the system inspected.
a) The symbol on the instrument panels with colour display is in
colour. 
The ACC is active.
No vehicle is detected in front. The programmed speed
remains constant.3
4
5 
If the symbol is white: the ACC is ac-
tive.
A vehicle in front has been detected. The ACC adjusts
speed and distance from the vehicle in front.

If the symbol is grey: ACC is inactive
(Standby)
The system is switched on, but is not adjusting.

It lights up green
The ACC is active.
Some warning and control lamps will light up
briefly
when the ignition i
s

switched on to
check certain functions. They will switch off
after a few seconds. WARNING
Observe the safety warnings ›››
in Warning
and contr o
l lamps on page 119. Note
When the ACC is connected, the indications
on the ins trument

panel screen may be con-
cealed by warnings from other functions,
such as an incoming call. 216

Operation
 ACC: parking brake applied
The A C
C is deactivated if the parking brake is
applied. The ACC is available once again after
the parking brake is released.
 ACC: currently not available.
Intervention of stability con-
trol
The message for the driver is displayed when
the electronic stability control (ESC) inter-
venes. In this case, the ACC is automatically
switched off.  ACC: Take action!
The message for the driver is displayed if,
when the vehicle starts up on a hill with a
mild slope, the vehicle rolls back even al-
though the ACC is activated. Apply the brake
to stop the vehicle from moving/colliding
with another vehicle.  ACC: speed limit
The message for the driver is displayed if, in
vehicles with manual gearbox, the current
speed is too low for the ACC mode.
The speed to be stored must be at least
30 km/h (18 mph). The speed limiter
switches off if the speed falls below 20 km/h
(12 mph).  ACC: available as of the 2nd
gear The ACC is operational as of the 2nd gear
(manual g
earbox).
 ACC: engine speed
The message for the driver is displayed if,
when the ACC accelerates or brakes, the driv-
er does not shift up or down a gear in time,
which means exceeding or not reaching the
permissible engine speed. The ACC switches
itself off. A buzzer warning is heard.  ACC: clutch pressed
Vehicles with a manual gearbox: pressing the
clutch pedal for longer abandons control
mode. Door open
Vehicles with automatic gearbox: the ACC
cannot be activated with the vehicle station-
ary and the door open. WARNING
There is a danger of rear collision when the
minimum dis t

ance to the vehicle in front is
exceeded and the speed difference between
both vehicles is so great that a speed reduc-
tion by the ACC will not suffice. In this case
the brake pedal should be applied immedi-
ately.
● The ACC may not be able to detect all situa-
tions pr
operly.
● “Stepping” on the accelerator may cause
the ACC
not to intervene in braking. Driver braking will have priority over intervention by
the speed c
ontr

ol or adaptive cruise control.
● Always be ready to use the brakes!
● Observe country-specific provisions gov-
erning ob
ligatory minimum distances be-
tween vehicles. Note
● The pr ogrammed s

peed is erased once the
ignition or the ACC are switched off.
● When the traction control system (ASR) is
deactivat
ed during acceleration or else the
ESC is activated in Sport* Mode
( ››› page 120), the ACC switches off automati-
cally.
● In vehicles with the Start-Stop system, the
engine swit
ches off automatically during the
ACC stopping phase and restarts automatical-
ly to begin driving. 220