2015 Seat Leon 5D warning

Driver assistance systems
● To r
e
sume control, apply the brake and turn
the lever to position 2 .
WARNING
It is dangerous to activate control and resume
the progr ammed s

peed if the road, traffic or
weather conditions do not permit this. Risk of
accident! Setting the distance
Fig. 199
Control lever for: setting the dis-
t anc
e. ●
To display the distance currently program-
med, briefly pre

ss the rocking button
››› Fig. 199.
● To increase/reduce the distance one level,
pres
s the rocking button again towards the
left/right. The instrument panel display
modifies the distance between both vehicles. If the vehicle approaches another vehicle de-
tected in fr

ont of it, the ACC reduces the
speed accordingly and then controls the ad-
justed distance. If the vehicle detected in
front accelerates, the adaptive cruise control
will also accelerate up to the target speed
programmed at most.
The greater the speed, the greater the dis-
tance in metres should be ››› . We recom-
mend the settin g
Di

stance 3. WARNING
With regard to distance setting, the driver is
re s

ponsible for observing country-specific
legislation. Message texts
 AC
C not available
The sy
stem 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: currently not available. No sensor vi-
s
ion


ACC and Front Assist: currently not availa-
ble. 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 sensor.
 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.
 ACC: parking brake applied
The ACC 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 control
The message for the driver is displayed when
the electronic stability control (ESC) inter-
venes. In this case, the ACC is automatically
switched off. »
193
Technical data
Advice
Operation
Emergencies
Safety

Operation
 A CC: Take action!
The me s
sage 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. The cruise control system switches off
if the speed falls below 20 km/h.
 ACC: available as of the 2nd gear
The ACC is operational as of the 2nd gear
(manual gearbox).
 ACC: engine speed
The message for the driver is displayed if,
when the AAC 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 AAC 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.   
Three white dots
appear if a setting made
with the control lever cannot be performed.
For example, if when the vehicle is stationary
the ACC cannot be activated because the
driver is not wearing the seat belt.
Door open
Vehicles with automatic gearbox: the ACC
cannot be activated with the vehicle station-
ary and the door open.
Deactivating the Adaptive Cruise Con-
trol
ACC temporarily in certain situa-
tions In the following situations the Adaptive
C
rui
se C

ontrol (ACC) should be deactivated
due to the system's limitations ››› :
● When changing lanes, on tight bends and
r ou
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
coul
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
vehicle 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. 194

Driver assistance systems
Special driving situations Fig. 200
(A) Vehicle on a bend. (B) Motorcy-
c li
s
t ahead out of range of the radar sensor. Fig. 201
(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:
Deceleration until the vehicle has stopped
(only vehicles with automatic gearbox)
If the vehicle in front slows down and stops,
the ACC will also slow down and halt the ve-
hicle. After approximately 3 seconds the sys- tem will inform the driver that he or she
should t

ake control of the vehicle by means
of an audible and visual warning on the in-
strument panel.
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.
Overtaking
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 190.
Driving through a bend
On entering or exiting bends, the radar sen-
sor may no longer determine the vehicle in
front or react to a vehicle in the adjacent lane
››› Fig. 200 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 »
195
Technical data
Advice
Operation
Emergencies
Safety

Driver assistance systems
WARNING
If the message ACC ready to start ap-
pear s
on the instrument panel display and
the vehicle in front starts up, the vehicle will
start up automatically. In this case the radar
sensor may not detect obstacles on the road.
This could cause an accident and serious in-
juries.
● Before driving off, check that the road is
cle
ar. If necessary, apply the brake. Monitoring system Front As-
s
i
s

t*
Introduction 

›› ›

table on page 2
The Front Assist Monitoring system helps to
prevent rear collisions.
The Front Assist can warn the driver of colli-
sion hazards, prepare the vehicle for emer-
gency braking in case of danger, assist the
driver on braking and cause automatic brak-
ing.
The Front Assist is not a replacement for
driver awareness. Distance warning
If the sy
s

tem detects that safety is endan-
gered by the proximity of the vehicle in front,
it may warn the driver by means of a message
on the instrument panel when driving at a
speed of between approximately 60 km/h
(37 mph) and 210 km/h (130 mph)
››› Fig. 202.
The warning moment varies depending on
the traffic situation and driver behaviour.
Pre-warning
If the system detects a possible collision with
the vehicle in front, it may warn the driver by
means of an audible warning and an indica-
tion on the instrument panel when driving at
a speed of between approximately 30 km/h
(18 mph) and 210 km/h (130 mph)
››› Fig. 202.
The warning moment varies depending on
the traffic situation 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,
the system may actively intervene in the
brakes when driving at a speed of between
approximately 30 km/h (18 mph) and
210 km/h (130 mph), generating a brief jolt
to warn of the imminent collision. Automatic braking
If the driver al

so fails to react to the pre-warn-
ing, the system may brake the vehicle auto-
matically, by progressively increasing braking
effect driving at a speed of between approxi-
mately 5 km/h (3 mph) and 210 km/h
(130 mph). By reducing speed in case of a
possible collision, the system may contribute
to reducing the consequences of an accident.
Front assist
If the Front Assist notices that the driver is
not braking sufficiently in case of a collision
hazard, the system can increase braking ef-
fect and thus avert the collision when driving
at a speed of between approximately 5 km/h
(3 mph) and 210 km/h (130 mph). Front as-
sist only acts while the brake pedal is press-
ed down hard. WARNING
The intelligent technology in the Front Assist
cannot c

hange the laws of physics. The driver
is always responsible for braking in time. If
the Front Assist issues a warning, then, de-
pending on the traffic circumstances, you
must brake immediately or dodge the obsta-
cle.
● 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. » 197
Technical data
Advice
Operation
Emergencies
Safety

Operation
●
In comp l
ex driving situations, the Front As-
sist may issue unnecessary warnings and in-
tervene unnecessarily in braking, such as in
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.
● During driving, the Front Assist does not re-
act to peop
le or animals or vehicles crossing
your path or which approach you head-on in
the same lane.
● The driver must always be ready to take
over the c
ontrol of the vehicle. Note
● When the Front As

sist causes a braking,
the brake pedal is “harder”.
● Automatic interventions by the Front Assist
on the brake
s may be interrupted by pressing
the clutch, accelerator or moving the wheel.
● 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. On-screen warning lamps and mes-
s
ag
e

s Fig. 202
On the instrument panel display:
W arnin
g indic

ations. Distance warning
If
the s
af

e distance with regard to the vehicle
in front is exceeded, the relevant warning will
appear on the instrument panel display
. WARNING
Observe the safety warnings ›››
in Warning
and indication l amp
s on page 109. Note
When the Front Assist is connected, the indi-
cation s

on the instrument panel screen may
be concealed by warnings from other func-
tions, such as an incoming call. Radar sensor
Fig. 203
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. 203 1 . This sensor can detect vehi-
c l
e

s in front up to a distance of approximately
120 m.
The radar 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 monitoring system does not
work. The instrument panel displays the fol-
lowing message: Front Assist: No sensor vision! If necessary clean the ra-
dar 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.
198

Driver assistance systems
Front Assist operation may be affected by a
s tr
on
g 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 road 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 structural modifications are made to the ve-
hicle, for example, if the suspension is low-
ered or the front spoiler is modified, Front As-
sist operation may be affected. So structural
modifications should only be made by speci-
alised workshops. SEAT recommends visiting
a SEAT dealership for this purpose.
If work is done incorrectly on the front of the
vehicle, the radar sensor could be damaged
or lose its settings, and Front Assist opera-
tion may be affected. So repair work should
only be made by specialised workshops.
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 damage. If this occurs have it adjusted.
● The sensor may become damaged or lose
its settin
gs when knocked, for example, dur- ing a parking manoeuvre. This may compro-
mise the sy
s

tem'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.
● Clean away the snow with a brush and the
ice pref
erably with a solvent-free de-icer
spray. Operating the Front Assist monitoring
sys
t

em Fig. 204
On the instrument panel display:
Fr ont
As

sist switched off message. The Front Assist monitoring system is active
whenev
er the ignition i
s

switched on.
When the Front Assist is switched off, so too
are the pre-warning function (pre warning)
and the distance warning. SEAT recommends leaving the Front Assist al-
way

s switched on. Exceptions ››› page 200,
Switching the Front Assist Monitoring Sys-
tem off in the following situations .
Switching the Front Assist monitoring sys-
tem on and off
With the ignition switched 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 assist systems
›››  page 32.
● OR: switch the system on or off in the Easy
Connect
system with the button  and the
f u
nction b
uttons  and
Driv
er As
s ist ›››
 pag
e 28.
When the Fr ont Assist monitoring system is
switched off, the instrument panel will inform
that it has been switched off with the follow-
ing indicator  ››› Fig. 204.
Switching the pre-warning function on or off
The pre-warning function can be switched on
or off in the Easy Connect system with the
button  and the function buttons
 and
Driv er As
s

ist
› ›
›
 page 28.
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. »
199
Technical data
Advice
Operation
Emergencies
Safety

Operation
Switching distance warning on and off
If the s
af
e 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 function can be activa-
ted or deactivated in the Easy Connect sys-
tem with the button  and the function but-
t on
s

 and
Driv
er As
s ist
› ››
 p
age 28.
The sy
stem 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 Monitoring
Sys
tem off in the following situations In the following situations the Front Assist
Monit
orin
g

System should be deactivated
due to the system's limitations ››› :
● When the vehicle is to be towed.
● If the vehicle is on a test bed.
● When the radar sensor is damaged.
● If the radar sensor takes a heavy knock, for
e x
amp

le in a rear collision.
● If it intervenes several times unnecessarily. ●
If the ra
dar sensor is covered temporarily
with some kind of accessory, such as an ad-
ditional headlight or the like.
● When the vehicle is to be loaded on a lorry,
ferry
or train. WARNING
If the Front Assist is not switched off in the
sit uation

s described, serious accidents and
injuries may occur.
● Switch off the Front Assist in critical situa-
tions. System limitations
The Front Assist Monitoring System has cer-
t
ain ph
y

sical limitations inherent in the sys-
tem. Thus, in certain circumstances some of
the system's reactions may be inopportune
or be delayed from the driver's standpoint.
So pay attention in order to intervene if nec-
essary.
The following conditions may cause the Front
Assist Monitoring System not to react or do
so too late:
● On taking tight bends.
● Pressing the accelerator all the way down.
● If the Front Assist is switched off or dam-
aged. ●
If the ASR ha
s been manually disconnec-
ted.
● If the ESC is controlling.
● If several brake lights of the vehicle or elec-
trically
connected trailer are damaged.
● If the radar sensor is dirty or covered.
● If there are metal objects, e.g. rails on the
roa
d or sheets used in road works.
● If the vehicle is reversing.
● If the vehicle over-accelerates.
● In case of snow or heavy rain.
● In case of narrow vehicles, such as motor-
bike
s.
● Misaligned vehicles.
● Vehicles crossing the other's path.
● Vehicles approaching in the opposite direc-
tion.
● Special loads and accessories of other ve-
hicle
s that jut out over the sides, backwards
or over the top.
200

Driver assistance systems
City Emergency braking function Fig. 205
On the instrument panel display:
pr e-w
arnin
g message The City Emergency braking function is part
of
the Fr
ont

Assist monitoring and is active
whenever the system is switched on.
Depending on the equipment, the pre-warn-
ing function can be switched on or off in the
Easy Connect system with the button  and
the f u
nction b

uttons  and
Driv
er As
s ist›››
 pag
e 28.
The C ity Emergency braking function picks
up, at speeds between 5 km/h (3 mph) and
30 km/h (19 mph) approximately, the traffic
situation in front of the vehicle up to a dis-
tance of about 10 m. If the system detects a possible collision with
a v
ehic

le in front of it, the vehicle prepares
for a possible emergency braking ››› .
If the driv
er f

ails to react to a possible colli-
sion, the system may brake the vehicle auto-
matically, by progressively increasing braking
effect driving to reduce speed in the event of
a collision. The system can thus help to re-
duce the consequences of an accident.
Status display
Automatic deceleration by means of the City
Emergency braking function is displayed on
the instrument panel by means of the pre-
warning ››› Fig. 205 1)
. WARNING
The smart technology included in the City
Emerg ency

braking function cannot defy the
laws of physics. The driver is always respon-
sible for braking in time.
● 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 City Emergency braking function alone
cannot pr
event accidents or serious injury.
● In complex driving situations, the City
Emergency
braking function may issue unnec-
essary warnings and intervene inopportunely in braking, such as in work areas or if there
are met
a

l rails.
● If the operation of the City Emergency brak-
ing fu
nction is impaired, for example, by dirt
or because the radar sensor has lost its set-
tings, the system may issue unnecessary
warnings and intervene inopportunely in the
braking.
● During driving, the City Emergency braking
function doe
s not react to people or animals
or vehicles crossing your path or which ap-
proach you head-on in the same lane. Note
● When the City Emer

gency braking function
causes a braking, the brake pedal is “hard-
er”.
● Automatic interventions on the brakes by
the City Emer
gency braking function may be
interrupted by pressing the clutch, accelera-
tor or moving the wheel.
● The City Emergency braking function can
brake the
vehicle until it stops completely.
However, the brake system does not halt the
vehicle permanently. Use the foot brake!
● If several inopportune intervenes occur,
switc
h off the Front Assist and with it the City
Emergency braking function. Take it to a spe-
cialised workshop, SEAT recommends visiting
a SEAT dealership. »1)
The symbol on the instrument panels with colour
dis p

lay is in colour. 201
Technical data
Advice
Operation
Emergencies
Safety