2016 Seat Leon 5D light

Operation
Indications on the display, warning
and c ontr
o
l lampsFig. 198
On the instrument panel display: (A)
A C
C

temporarily inactive, vehicle detected in
front, temporary distance adjusted. (B) ACC
active, vehicle detected in front, temporary
distance adjusted. Status display
Indic
ation
s

on the display ››› Fig. 198:
Vehicle in front, the ACC is inactive.
1 Distance margin selected, the ACC is in-
activ
e.
V ehic

le detected in front. The ACC is ac-
tive.
Adjustment of the temporary distance
from the vehicle in front with a program-
med speed.
Temporary distance adjustment from the
vehicle in front with a programmed
speed.
Warning and control lamps
››› in Warning and control lamps on
p ag
e 109

. 
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 radar sensor visually for dirt,
ice or knocks. If it is still unavailable, refer to a special-
ised workshop to have the system inspected.
a)
The symbol on the instrument panels with colour display is in
colour.
2 3
4
5 The ACC is active.
No vehicle is detected in front. The programmed speed
remains constant.

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: the ACC is not
active.
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 109. 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. 198

Driver assistance systems
Radar sensor Fig. 199
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. 199 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
adaptive cruise control (ACC) does not work.
The instrument panel displays the following
message: ACC: No sensor vision! If
necessary clean the radar sensor ››› .
When the r a
d

ar 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 rev

erse reflection. This may occur, for ex-
ample, 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 ACC operation.
If structural modifications are made to the ve-
hicle, for example, if the suspension is low-
ered or the front spoiler is modified, ACC op-
eration may be affected. So structural modifi-
cations should only be made by specialised
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 ACC operation may
be affected. So repair work should only be
made by specialised workshops. SEAT recom-
mends visiting a SEAT dealership for this pur-
pose. CAUTION
If you have the sensation that the radar sen-
sor is d

amaged or has lost its settings, dis-
connect the ACC. This will avoid possible
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. 199
Technical data
Advice
Operation
Emergencies
Safety

Operation
Operating the Adaptive Cruise Control
A C
C Fig. 200
On the left of the steering column:
thir d l
ev
er for operating the Adaptive Cruise
Control. Fig. 201
On the left of the steering column:
thir d l
ev

er for operating the Adaptive Cruise
Control. When the Adaptive Cruise Control (ACC) is
c
onnect
ed, the gr

een control lamp  will
light up on the instrument panel, and the
programmed speed and ACC status will be
displayed ››› Fig. 198.
Conditions for the adaptive cruise control to
be activated ● The selector lever must be at the D or S po-
sition or in the tiptronic
selection track. In
manual gearbox any forward gear must be
engaged, except the 1st gear.
● In vehicles with manual gearbox, if there is
no programmed s
peed, drive at least at
30 km/h (18 mph).
Speed control
When the ACC is connected, speed can be
programmed and adjusted. The programmed
speed must be different from the speed at
which the vehicle travels if the distance is be-
ing adjusted at the time.
What functions can be operated?
If you activate the ACC the current speed can
be programmed as the “control speed”.
During driving, control can be operated at
any time and the speed also modified. The following settings can also be adjusted:
●
Distance.
● Driving Programme.
● Driving style.
Activatin
g/Deactivating
Any speed 1)
between 30 and 210 km/h (19
and 150 mph) can be adjusted.
Activating the ACC
● Pull the lever to position 1
› ›
› Fig. 200
.
ACC standby will be shown on the instrument
panel display.
Programme speed and activate control
● Press the SET
› ›
› Fig. 201
button to pro-
gramme current speed.
● Automatic gearbox: apply the brake pedal
to activat
e control with the vehicle stationary.
Deactivating the ACC
● Move the lever to position 0 until it en-
g ag
e

s. The text ACC: off appears.
Altering speed
● To increase or reduce speed step by step,
pres
s the lever up/down briefly ›››
Fig. 201. 1)
Different speed limits apply in each country and
depend on the unit indic

ated on the speedometer.
200

Driver assistance systems
Any modification to the programmed speed
i s
sho
wn on the bottom left part of the instru-
ment panel display.
Adjusting distance level
The distance according to speed with regard
to the vehicle in front can be controlled on
the Easy Connect system on 5 levels
›››  page 27.
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
You can u
se the Easy Connect system to ad-
just the level of distance that should be ad-
justed when the ACC is switched on with the  button and the
S
ETUP and
Driv
er a
s
sistancefunction buttons
››
›
 page 27.
Adjusting the driving programme
In vehicles with driving profile selection
(SEAT Drive Profile), the profile selected can
influence acceleration behaviour
››› page 219. The following driving programmes items can
be selected:
● Norm

al
● Sport
● Eco
In vehic
les without the driving profile selec-
tion function, acceleration behaviour can be
influenced by selecting a driving programme
on the Easy Connect system using the  button and the
S
ETUP and
Driv
er a
s
sistance function buttons
››
›
 page 27.
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 is not wearing his/her seat
belt.
● If sev

eral 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). 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 brak
e ped

al 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 control 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 progr ammed 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 110), 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. Vehicles with an automatic gearbox
If the vehicle is equipped with automatic
g
e
arbo

x, the ACC can brake the vehicle until »
201
Technical data
Advice
Operation
Emergencies
Safety

Driver assistance systems
Special driving situations Fig. 205
(A) Vehicle on a bend. (B) Motorcy-
c li
s
t ahead out of range of the radar sensor. Fig. 206
(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. Overtaking
When the turn sign

al 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 200.
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. 205 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 200.
Driving in tunnels
When driving through tunnels the radar sen-
sor may be limited. Switch off the ACC in tun-
nels. »
205
Technical data
Advice
Operation
Emergencies
Safety

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. 209
On the instrument panel display:
Fr ont
As

sist switched off message. Front Assist is active whenever the ignition is
sw
it
c

hed 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-
way

s switched on. Exceptions ››› page 210,
Switch Front Assist off in the following situa-
tions.
Activating and deactivating Front Assist
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 assistance sys-
tems ›››
 page 31.
● OR: switch the system on and off in Easy
Connect
using the  button and the
Set
up and
Driv
er a
s
sistance function buttons
› ›
›
 page 27.
When Front Assist is switched off, the instru-
ment panel will inform that it has been
switched off with the following indicator 
››› Fig. 209.
Switching the advance warning function on
or off
The advance warning function may be switch-
ed on and off in the Easy Connect system us-
ing the  button and the
Set
up and
Driv er a
s

sistance function buttons
› ›
›
 page 27.
The system will store the setting for the next
time the ignition is switched on.
SEAT recommends keeping the advance
warning function switched on at all times. »
209
Technical data
Advice
Operation
Emergencies
Safety

Operation
Depending on the infotainment system in-
s t
al
led in the vehicle, the advance warning
function may be adjusted as follows:
● Ready
● Medium
● Delayed
● 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 may be switched on
and off in the Easy Connect system using
the  button and the
S
ETUP and
Driv er a
s

sistance function buttons
› ›
›
 page 27.
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. Switch Front Assist off in the following
situation

s In the following situations the Front Assist
Monitorin
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
ex amp

le in a rear collision.
● If it intervenes several times unnecessarily.
● If the radar sensor is covered temporarily
with some k ind 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
Front Assist has certain physical limitations
inher
ent in the sy

stem. Thus, in certain cir-
cumstances some of the system's reactions may be inopportune or be delayed from the
driver's s

tandpoint. So pay attention in order
to intervene if necessary.
The following conditions may cause Front As-
sist not to react or to 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 h

as been manually disconnec-
ted.
● If the E

SC 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.
210

Operation
Indications on the display and lamps Fig. 212
On the instrument panel display: In-
dic ation on the Lane As
s
ist system display
(example 1). Fig. 213
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. 212 A.
The system is active and available, both
lane lines are recognised. The steering
angle is not being corrected at this mo-
ment ››› Fig. 212 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. 213 C.
The two lines A light up simultaneously
when both l ane line
s

are recognised and
the Lane Assist function is active
››› Fig. 213 D.
Control lamps 
Blinks or lights up yellow: Lane Assist
active but not available.
The system can not accurately recognise the lane.
Please see page 215, the Lane Assist system is not
available (the control lamp is lit up yellow). 
Blinks or lights up green:
Lane Assist system active and available.
WARNING
Observe the safety warnings ›››
in Warning
and contr o
l lamps on page 109. –
–
214