2013 Seat Leon SC sensor

117
Lights and visibility
Vehicle with halo-
gen headlightsIn the “Leaving Home” function, the daytime running
lights (DRL), the rear side lights and the licence plate
lights are switched on.
Vehicle with full-
LED headlightsIn the “Leaving Home” function, the dipped beams,
the daytime running lights (DRL), the rear side lights
and the licence plate lights are switched on.
Activation
● When the vehicle is unlocked using the remote control.
● The “Leaving Home” function is only activated when the rotary light
switch is in position  and the light sensor detects darkness.
Deactivation
● When the “Leaving Home” lights go out after the delay period (default:
30 sec.).
● When the vehicle is locked using the remote control.
● When the light control is switched into a position other than .
● With the ignition is switched on. 
Headlight range control, lighting of the instrument panel
and controls
Fig. 67 Next to the
steering wheel: Head-
light range control Lighting of the instrument panel and controls*
Depending on the model, lighting of the instrument panel and controls can
be adjusted in the Easy Connect system, using the button

and the func-
tion button SETUP ⇒ page 82.
Headlight range control
The headlight range control ⇒ Fig. 67 is modified according to the value of
the headlight beam and the vehicle load status. This offers the driver opti-
mum visibility and the headlights do not dazzle oncoming drivers ⇒ 
.
The headlights can only be adjusted when the dipped beam is switched on.
To reset, turn switch ⇒ Fig. 67:
ValueVehicle load status a)–Two front occupants, luggage compartment empty1All seats occupied, luggage compartment empty
2All seats occupied, luggage compartment full With trailer
and minimum drawbar load
3Driver only, luggage compartment full With trailer and
maximum drawbar load
a)
If the vehicle load does not correspond to those shown in the table, it is possible to select
intermediary positions.
Dynamic headlight range control
The control is not mounted in vehicles with dynamic headlight range con-
trol. The headlight range is automatically adjusted according to the vehicle
load status when the headlights are switched on.
Instrument panel lighting
In vehicles with the daytime driving light, the instrument panel lighting
switches on in dark conditions (for example, when passing through a tun-
nel). This reminds the driver to manually switch on the dipped beam, so
that the vehicle rear lights also switch on ⇒ page 112.
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121
Lights and visibility
Window wiper lever
Fig. 70 Operating the
windscreen wiper and
rear wiper
Move the lever to the required position ⇒ :
0Windscreen wiper off.
1
Windscreen wipers interval wipe.
Using the control ⇒ Fig. 70 A adjust the interval (vehicles
without the rain sensor), or the sensitivity of the rain sensor.
2Slow wipe.
3Continuous wipe.
4Brief press, short clean. Hold the lever down for more time to
increase the wipe frequency.
5
The windscreen washer function is activated by pushing the
lever forwards, and simultaneously the windscreen wipers
start.
Move the lever to the required position ⇒ :
6Interval wipe for rear window. The rear wiper will wipe the
window approximately every six seconds.
7The windscreen washer function is activated by pressing the
lever, and the rear wiper starts simultaneously.
CAUTION
If the ignition is switched off with the windscreen wipers active, they com-
plete their wipe before returning to the rest position. Ice, snow and other
obstacles on the windscreen may damage the wiper and the windscreen
wiper motor.
● If necessary, remove snow and ice from the windscreen wipers before
starting your journey.
● Carefully lift the frozen windscreen wipers from the glass. SEAT recom-
mends a de-icer spray for this operation.
CAUTION
Do not switch on the windscreen wipers if the windscreen is dry. Cleaning
with the windscreen wipers while dry can cause damage.
Note
● The windscreen wiper and rear wiper system only function when the ig-
nition is switched on and the bonnet or rear lid, respectively, are closed.
● The interval wipe speed varies according to the vehicle speed. The faster
the vehicle is moving, the more often the windscreen is cleaned.
● The rear wiper is automatically switched on when the windscreen wiper
is on and the car is in reverse gear. 
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123
Lights and visibility
Lifting and returning windscreen wiper arms
● Place the wiper arms in the service position ⇒ 
.
● Only hold the wiper arms at the point where the blade is fixed.
CAUTION
● To prevent damage to the bonnet and the wiper arms, only leave them in
the service position.
● Before driving, always lower the wiper arms. 
Rain sensor*
Fig. 72 Windscreen wip-
er lever: adjusting the
rain sensor A
Fig. 73 Rain sensor sen-
sitive 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. Manual wipe ⇒ page 121
Move the lever to the required position ⇒ Fig. 72:
Rain sensor off.
Rain sensor on; automatic wipe if necessary.
Setting sensitivity level of rain sensor
– Set control to the right: highly sensitive.
– 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 travelling at more than 16 km/h (10 mph).
Rain sensor modified behaviour
Possible causes of faults and mistaken readings
on the sensitive surface
⇒  Fig. 73 of the rain sensor include:

0
1A
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124Lights and visibility
● 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 con-
tinuous wipe.
● Insects: insects on the sensor may trigger the windscreen washer.
● 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 cy-
cle with the rain sensor on. Next the rain sensor detects the reduction in the
sensitive surface area and adapts accordingly. The behaviour of the sensor
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 wind-
screen obstructs visibility.
Note
● Clean the sensitive surface of the rain sensor regularly and check the
blades for damage ⇒ Fig. 73 (arrow).
● To remove wax and coatings, we recommend a window cleaner contain-
ing alcohol. Checking and topping up the windscreen washer reservoir
with water
Fig. 74 In the engine
compartment: wind-
screen washer reservoir
top
Check the water level in the windscreen washer reservoir regularly and top
up as required.
● Open the bonnet 
⇒  page 251.
● The washer reservoir is marked with the symbol  on the lid
⇒ Fig. 74.
● Check there is enough water in the reservoir.
● To top up, mix water with a window cleaner recommended by SEAT
⇒ 
.
Please follow the instructions for use found on the packaging.
● In cold weather, a special antifreeze should also be added to prevent
the water from freezing ⇒ 
. 

189
Driver assistance systems
Adaptive cruise control (ACC)*
Introduction
Fig. 129 Detection area
Adaptive cruise control (ACC) is an extension of vehicle cruise control (GRA)
⇒ 
.
The ACC function allows the driver to establish a cruising speed between 30
and 160 km/h (18 and 100 mph), as well as the time distance from the ve-
hicle ahead. The ACC function will adapt to the vehicle's adaptive cruise
speed at all times, maintaining a safety distance from the vehicle ahead.
The ACC function is based on a radar sensor that can measure the distance
to vehicles ahead.
If the vehicle is equipped with automatic gearbox, the ACC may brake it un-
til it stops completely if the vehicle ahead stops.
Request for driver intervention
During driving, the ACC is subject to certain limitations inherent in the sys-
tem. In other words, in certain circumstances the actual driver will have to
control speed and distance with regard to other vehicles. In this case, the instrument panel display
will tell the driver to intervene by
pressing the brake pedal, and a warning sound will go off ⇒ page 191.
Additional information and warnings:
● SEAT information system ⇒ page 73
● Easy Connect system ⇒ page 79
● Cruise control system (CCS) ⇒ page 184
● Front Assist ⇒ page 202
● Lane Assist ⇒ page 207
● Accessories, parts replacement, repairs and modifications ⇒ page 272
WARNING
The intelligent technology in the ACC cannot overcome the system's own
limitations or change the laws of physics. If used negligently or uninten-
tionally it may cause a serious accident and serious injury. The system is
not a replacement for driver awareness.
● Always adapt speed and safety distance to the vehicle ahead accord-
ing to visibility, weather, road and traffic conditions.
● Do not use the ACC in conditions of poor visibility, on steep roads,
with several bends or in slippery 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 only been designed for use on paved roads.
● The ACC does not react on approaching a stationary obstacle, such as
the end of a traffic jam or a broken-down vehicle or a vehicle stopped at
traffic lights.
● The ACC does not react during driving to people or animals or vehi-
cles changing lane or approaching in the opposite direction in the same
lane.
● If the ACC does not reduce speed enough, apply the foot brake imme-
diately. 
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190Driver assistance systems
WARNING (Continued)
● If the vehicle continues to move following a driver intervention re-
quest, apply the foot brake.
● If the instrument panel display shows a driver intervention request,
adjust the distance yourself.
● The driver must be ready to accelerate or brake by him- or herself at
any time.
CAUTION
If you have the impression that the radar sensor is damaged, disconnect the
ACC. This will prevent possible damage. In this case have it adjusted.
● A radar sensor repair requires specialist knowledge and special tools.
SEAT recommends visiting a SEAT dealership for this.
Note
● If the ACC does not operate as described in this chapter, do not use it
until it has been checked by a specialised workshop. SEAT recommends vis-
iting a SEAT dealership for this.
● The maximum speed with the ACC switched on is limited to 160 km/h
(100 mph).
● When the ACC is switched on, strange noises may be heard during auto-
matic braking. Messages on the display, control and warning lampsFig. 130 On the instrument panel display: (A) ACC temporarily inactive, vehicle detec-
ted ahead, temporary distance adjusted. (B) ACC active, vehicle detected ahead, a tem-
porary distance is adjusted.
Status display
Messages on the display ⇒ Fig. 130:
Vehicle ahead, the ACC is inactive.
Distance margin selected, the ACC is inactive.
Vehicle detected ahead. The ACC is active.
Adjustment of the temporary distance with regard to the vehicle ahead
with a set speed.
Temporary distance adjusted with regard to the vehicle ahead with a
set speed. 
1
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5

191
Driver assistance systems
Warning and control lamps
Lights upPossible cause ⇒ Solution

A speed reduction by the ACC to
maintain distance with the ve-
hicle ahead is not enough.Brake! Use the foot brake!
Driver intervention necessary:
 The ACC is not currently availa-
blea)
.
With the vehicle stationary,
switch the engine off and back
on again. Check the radar sen-
sor visually (in case it is dirty,
has ice or has been knocked).
If it is still unavailable, refer to
a specialised workshop to
have the system inspected.

The ACC is active. No vehicle is
detected ahead. The set speed
remains constant.–

If the symbol is white: the ACC
is active. A vehicle in front has
been detected. The ACC adjusts
the speed and the distance
from the vehicle ahead.
–If the symbol is grey: the ACC is
not active. The system is
switched on, but it is not con-
trolling.
The ACC is active.–
a) The symbol is in colour on the instrument panel with colour display.
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 sec-
onds.
WARNING
Failure to heed the warning lamps when they light up and the corre-
sponding messages may result in damage to the vehicle and serious in-
jury.
● Never ignore the warning lamps or messages.
CAUTION
Failure to heed the control lamps when they light up and the corresponding
messages may result in damage to the vehicle.
Note
When the ACC is connected, the instrument panel display messages may be
hidden by messages pertaining to other functions, such as an incoming
call. 
Radar sensor
Fig. 131 On the front
bumper: radar sensor. 
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192Driver assistance systems
On the front bumper there is a radar sensor to detect traffic conditions
⇒ Fig. 131 1
. This sensor can detect vehicles driving ahead at a distance
of up to approx. 120 m.
The radar sensor's visibility may be impaired by dirt, such as mud or snow,
or by environmental influences, such as rain or water mist. In this case the
adaptive cruise control (ACC) does not work. The following message is
shown in the instrument panel display: ACC: Sensor without visibility!. If nec-
essary, clean the radar sensor ⇒ 
.
When the radar sensor works properly again, the ACC will be automatically
available again. The message on the instrument panel display will go off
and the ACC can be switched on again.
ACC operation may be affected by a heavy reverse reflection of the radar sig-
nal. This may occur, for example, in a closed car park or due to the presence
of metal objects (e.g. rails on the road or the panels used on work sites).
The area ahead of and behind the radar sensor should not be covered with
adhesives, additional headlights or the likes, as this may have a negative
effect on ACC operation.
If structural modifications are made to the vehicle, e.g., if the suspension is
lowered or the front spoiler is modified, ACC operation may be affected. This
is why structural modifications should only be assigned to specialised work-
shops. SEAT recommends visiting a SEAT dealership for this.
If the front part of the vehicle is repaired incorrectly, the radar sensor might
lose its setting and ACC operation would be affected. This is why repair jobs
should only be assigned to specialised workshops. SEAT recommends visit-
ing a SEAT dealership for this.
CAUTION
If you have the impression that the radar sensor is damaged or has lost its
setting, disconnect the ACC. This will prevent possible damage. In this case
have it adjusted.
● The sensor may lose its settings if it is knocked, for example, during a
parking manoeuvre. This may compromise the system's efficacy or lead it to
switch off.
● A radar sensor repair requires specialist knowledge and special tools.
SEAT recommends visiting a SEAT dealership for this.
● Snow should be removed with a brush, while ice should be removed
with a solvent-free anti-ice aerosol. 