2014 Seat Leon 5D sensor

Lights and visibility
Windscreen wiper functionsWindscreen wiper performance in different sit-
uations
If the vehicle is at a
standstillThe activated position provision-
ally changes to the previous posi-
tion.
During automatic
wipe
The air conditioner comes on for
approximately 30 seconds in air
recirculation mode to prevent the
smell of the windscreen washer
fluid entering the inside the vehi-
cle.
For the interval wipe
Intervals between wipes depend
on the vehicle's speed. The high-
er the vehicle speed the shorter
the intervals. Heated windscreen washer jets
The heating only thaws the frozen jets, it
does not thaw the water in the washer hoses.
The heated windscreen washer jets automati-
cally adjust the heat depending on the ambi-
ent temperature, when the ignition is switch-
ed on.
Headlight wash/wipe system
The headlight washers/wipers clean the
headlight lenses.
After the ignition is switched on, the first and
every fifth time the windscreen washer is
switched on, the headlights are also washed. Therefore, the windscreen wiper lever should
be pulled towards the steering wheel when
the dipped beam or main beam are on. Any
incrusted dirt (such as insects) should be
cleaned regularly (e.g. when refuelling).
To ensure the headlight washers work cor-
rectly in winter, any snow which has got into
the bumper jet supports should be cleaned
away. If necessary, remove snow with an anti-
icing spray.
Note
The wiper will try to wipe away any obstacles
that are on the windscreen. The wiper will
stop moving if the obstacle blocks its path.
Remove the obstacle and switch the wiper
back on again. Rain sensor*
Fig. 103
Windscreen wiper lever: adjusting
the rain sensor A Fig. 104
Rain sensor sensitive surface The rain sensor controls the frequency of the
windscreen wiper intervals, depending on
the amount of rain
››› . The sensitivity of the
rain sensor can be adjusted manually. Man-
ual wipe ››› page 102 .
Mo v

e the lever to the required position
››› Fig. 103:
Rain sen
sor off.
Rain sensor on; automatic wipe if neces-
sary.
Setting sensitivity level of rain sensor
– Set control to the right: highly sensi-
tive.
– Set control to the left: less sensitive.
When the ignition is switched off and then
back on, the rain sensor stays on and starts
operating again when the windscreen wipers
are in position 1 and the vehicle is travel-
ling at more than 16 km/h (10 mph). »
0 1
A
103
Technical specifications
Advice
Operation
Safety
The essentials

Operation
Rain sensor modified behaviour
Possible causes of faults and mistaken read-
ings on the sensitive surface ››› Fig. 104 of
the r ain sen
sor include:
● Damaged blades: a film of water on the
damaged blades may lengthen the activation
time, reduce the washing intervals or result
in a fast and continuous wipe.
● Insects: insects on the sensor may trigger
the windscreen wiper.
● Salt on roads: in winter, salt spread in the
roads may cause an extra long wipe when the
windscreen is almost dry.
● Dirt: dry dust, wax, coating on glass (Lotus
effect) or traces of detergent (car wash) may
reduce the effectiveness of the rain sensor or
make it react more slowly, later or not at all.
● Cracked windscreen: the impact of a stone
will trigger a single wipe cycle with the rain
sensor on. Next the rain sensor detects the
reduction in the sensitive surface area and
adapts accordingly. The behaviour of the sen-
sor will vary with the size of the damage
caused by the stone. WARNING
The rain sensor may not detect enough rain
to switch on the wipers.
● If necessary, switch on the wipers manually
when water on the windscreen obstructs visi-
bility. Note
● Clean the sensitive surface of the rain sen-
sor regularly and check the blades for dam-
age ››› Fig. 104 (arrow).
● To r
emove wax and coatings, we recom-
mend a window cleaner containing alcohol. Rear vision mirror
Anti-dazzle rear vision mirrors Read the additional information carefully
›››  page 13
Your vehicle is fitted with an interior rear vi-
sion mirror with a manual or automatic* con-
trol for anti-dazzle position.
Interior rear vision mirror with manual
setting for anti-dazzle position – Position the small lever of the lower edge
of the mirror to face towards the rear. WARNING
In the event that an automatic anti-dazzle
rear vision mirror breaks, an electrolyte fluid
may leak. This could cause irritation to the
skin, eyes and respiratory organs. If you
come into contact with this liquid, it must be
rinsed with large quantities of water. If neces-
sary, get medial help. CAUTION
In the event that an automatic anti-dazzle
rear vision mirror breaks, an electrolyte fluid
may leak. This liquid attacks plastic surfaces.
Clean it with a wet sponge as soon as possi-
ble. Note
● If the light incident in the interior rear vi-
sion mirror is obstructed (e.g. with the sun
blind*, the anti-dazzle rear vision mirror with
automatic setting will not operate perfectly.
● When the interior lights are on or reverse
gear engaged, the rear vision mirrors do not
darken with automatic adjustment for anti-
dazzle position. Adjusting the exterior mirrors
Fig. 105
Driver door: control for the exterior
mirror. 104

Operation
Air recirculation Basic pointsAir recirculation:

Manual recirculation
Air recirculation mode prevents the ambient
air from entering the interior.
When the outside temperature is very high,
selecting manual air recirculation mode for a
short period refreshes the vehicle interior
more quickly.
For safety reasons, air recirculation mode is
switched off when the button
 is press-
ed or the air distributor turned to .
Switching the manual air recirculation mode
on and off 
To switch system on: press the  button un-
til the warning lamp lights up.
To switch system off: press the  button un-
til the warning lamp goes off.
Functioning mode of automatic air
recirculation (air conditioning menu)
With the automatic air recirculation mode ac-
tivated, the entry of fresh air into the cabin
interior is enabled. If the system detects a
high concentration of hazardous substances
in the ambient air, air recirculation mode is
switched on automatically. When the level of impurities drops to within a normal range, re-
circulation mode is switched off.
The system is unable to detect unpleasant
smells.
The air recirculation will
not connect auto-
m atic
ally in versions without humidity sensor
and in the following external conditions:
● The outside temperature is lower than +3°C
(+38°F).
● The cooling system is switched off and the
outside temperature is below +10°C (+50°F).
● The cooling system is switched off, the out-
side temperature is below +15°C (+59°F) and
the windscreen wipers are switched on.
Activation/deactivation of automatic air recir-
culation is done in the air conditioner menu,
under Configuration. WARNING
Observe the safety warnings ››› in Intro-
duction on page 125.
● If the c

ooling system is switched off and air
recirculation mode switched on, the windows
can mist over very quickly, considerably limit-
ing visibility.
● Switch air recirculation mode off when it is
not required. CAUTION
Do not smoke when air recirculation is
switched on in vehicles with an air condition-
er. The smoke taken in could lie on the cool-
ing system vaporiser and on the activated
charcoal cartridge of the dust and pollen fil-
ter, leading to a permanently unpleasant
smell. Note
Climatronic: air recirculation mode is activa-
ted to prevent exhaust gas or unpleasant
odours from entering the vehicle interior
when it is in reverse and while the automatic
windscreen wiper is working. 128

Driver assistance systems
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. WARNING
Observe the safety warnings ››› in Control
and warning lamps on page 71. Operating the cruise control system*
Read the additional information carefully
›››  page 21
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. B C
D Automatic off
The cruise control system (CCS) is switched
off automatically or temporarily:
●
If the system detects a fault that could af-
fect the working order of the CCS.
● If you press and maintain the accelerator
pedal for a certain time, driving faster than
the stored speed.
● If the dynamic driving control systems in-
tervene (e.g. ASR or ESC).
● If the airbag is triggered.
Adaptive Cruise Control ACC* Introduction Fig. 149
Detection area. The adaptive cruise control (ACC)
is an exten-
sion of the normal cruise control system
(CCS)
›
›› .
The ACC function allows the driver to estab-
lish a cruise speed of between 30 and 160
km/h (18 and 100 mph), as well as the tem-
porary distance required with regard to the
vehicle in front. The ACC function will adapt
the vehicle's cruise speed at all times, main-
taining a safe distance with the vehicle in
front.
The ACC function is based on a radar sensor
that can measure the distance to the vehicles
in front.
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.
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 153 .
»
151Technical specifications
Advice
Operation
Safety
The essentials

Operation
WARNING
The intelligent technology in the ACC cannot
overcome 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
vehicle 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 roads, 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 unpaved roads. The ACC has been de-
signed for use on paved roads only.
● The ACC does not react on approaching a
fixed obstacle, such as the tail of a traffic
jam, a damaged vehicle or a vehicle stopped
at the traffic lights.
● The ACC does not react to people or animal
or vehicles crossing your path or which ap-
proach you head-on in the same lane.
● If the ACC does not reduce speed sufficient-
ly, brake 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 vehicle continues to move involuntar-
ily after a driver intervention prompt, brake
the vehicle by applying the pedal.
● If the dash panel displays a driver interven-
tion prompt, adjust the distance yourself.
● The driv er shou
ld be ready to accelerate or
brake by him/herself at all times. CAUTION
If you have the sensation that the radar sen-
sor is damaged, 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 ACC 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 160 km/h (100 mph).
● When the ACC is switched on, strange
noises may be heard during automatic brak-
ing cause by the braking system. Messages on display, control and
warning lamps
Fig. 150
On the instrument panel display: (A)
ACC temporarily inactive, vehicle detected in
front, temporary distance adjusted. (B) ACC
active, vehicle detected in front, temporary
distance adjusted. Status display
Indications on the display
››› Fig. 150 :
V ehic

le in front, the ACC is inactive.
1 152

Driver assistance systems
Distance margin selected, the ACC is in-
active.
Vehicle 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 Control and warning lamps on
page 71 . 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. 
The ACC is active.
No vehicle is detected in front. The programmed speed
remains constant.2
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: the ACC is not
active.
The system is switched on, but is not adjusting.


The ACC is active.
Some warning and control lamps will light up
briefly when the ignition is switched on to
check certain functions. They will switch off
after a few seconds.
WARNING
Observe the safety warnings ››› in Control
and warning lamps on page 71. Note
When the ACC is connected, the indications
on the instrument panel screen may be con-
cealed by warnings from other functions,
such as an incoming call. Radar sensor
Fig. 151
On the front bumper: radar sensor. A radar sensor is installed on the front bump-
er to determine the traffic situation
››› Fig. 151 1 . This sensor can detect vehi-
cles 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 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. »
153
Technical specifications
Advice
Operation
Safety
The essentials

Operation
ACC operation may be affected by a strong ra-
dar reverse 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 damaged 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 settings 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.
● Clean away the snow with a brush and the
ice preferably with a solvent-free de-icer
spray. Operating the Adaptive Cruise Control
ACC
Fig. 152
On the left of the steering column:
third lever for operating the Adaptive Cruise
Control. Fig. 153
On the left of the steering column:
third lever for operating the Adaptive Cruise
Control. When the Adaptive Cruise Control (ACC) is
connected, the green control lamp  will
light up on the instrument panel, and the
programmed speed and ACC status will be
displayed
››› Fig. 150 .
C ondition
s 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 speed, drive at least at
30 km/h (18 mph).
Speed control
When the ACC is connected, speed can be
programmed and adjusted. The programmed
154

Driver assistance systems
Interrupting control Fig. 154
On the left of the steering column:
third lever for operating the Adaptive Cruise
Control. Important: the ACC is active.
Interrupting control during driving
● Move the lever to the position 3 . The
ACC
standby message is displayed to the driver.
or
● Br ak
e.
● To resume the programmed speed, turn the
lever to position 2 .
Interrupt speed control with the vehicle
stationary
Applies to vehicles with automatic gearbox:
● Move the lever to the position 3 . The
ACC
standby message is displayed to the driver. ●
To r
esume control, apply the brake and turn
the lever to position 2 .
WARNING
It is dangerous to activate control and resume
the programmed speed if the road, traffic or
weather conditions do not permit this. Risk of
accident! Setting the distance
Fig. 155
Control lever for: setting the dis-
tance. ●
To display the distance currently program-
med, briefly press the rocking button
››› Fig. 155
.
● To inc

rease/reduce the distance one level,
press 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 front 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 setting Distance 3
. WARNING
With regard to distance setting, the driver is
responsible for observing country-specific
legislation. Message texts
 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.
»
157
Technical specifications
Advice
Operation
Safety
The essentials