ignition Seat Leon 5D 2012 Service Manual

106Lights and visibility
Lights and visibility
Lights Introduction
The legal requirements regarding the use of vehicle lights in each country
must be observed.
The driver is personally responsible for the correct use and adjustment of
the lights in all situations.
Additional information and warnings:
● Information system ⇒ page 73
● Changing bulbs ⇒ page 252
WARNING
If the headlights are regulated too high and the main beam is not used
correctly, there is a risk of dazzling or distracting other road users. This
could result in a serious accident.
● Always make sure that the headlights are correctly adjusted.
● Never use the main beam or headlight flasher when it can dazzle oth-
er drivers.
 Control lamps
lights upPossible causeSolution
Driving light totally or partially
faulty.
Replace the corresponding
bulb ⇒ page 252.
If all the bulbs are OK, the vehi-
cle should be taken to a speci-
alised workshop if necessary.
Rear fog light switched on.⇒ page 108.
Fog lights switched on
 
Left or right turn signal.
The control lamp flashes twice
as fast when a vehicle or trailer
turn signal is faulty.If necessary, check the vehicle
and trailer lighting.
Main beam on or flasher on.⇒ page 107.
Light Assist on.⇒ page 109.
Several warning and control lamps should light up for a few seconds when
the ignition is switched on, signalling that the function is being verified.
They will switch off after a few seconds.


107
Lights and visibility
WARNING
If the warning lamps and messages are ignored, the vehicle may stall in
traffic, or may cause accidents and severe injuries.
● Never ignore the warning lamps or text messages.
● Stop the vehicle safely as soon as possible.
● Park the vehicle at a suitable distance away from the traffic ensuring
that the exhaust system is not in contact with inflammable material, for
example, dry grass, fuel, oil, etc.
● A faulty vehicle represents a risk of accident for the driver and for oth-
er road users. If necessary, switch on the hazard warning lamps and put
out the warning triangle to advise other drivers.
CAUTION
Failure to heed the control lamps and text messages when they appear may
result in faults in the vehicle. 
Turn signal and main beam lever*
Fig. 59 Turn signal and
main beam lever
Move the lever to the required position: Right turn signal. Right-hand parking light (ignition switched off)
⇒ page 109.
Left turn signal. Left-hand parking light (ignition switched off)
⇒ page 109.
Main beam switched on ⇒ 
. The control lamp
 will light up on the
instrument panel.
Flashing the headlights. The flashed beam comes on if the lever is
pressed. The control lamp  will light up.
Push the lever all the way down to turn off the corresponding function.
Convenience turn signals
For the convenience turn signals, move the lever as far as possible upwards
or downwards and release the lever. The turn signal will flash three times.
The convenience turn signals are activated and deactivated in the Easy Con-
nect system via the 
key and the Setup function button ⇒ page 79.
In vehicles that do not have the corresponding menu, this function can be
deactivated in a specialised workshop.
WARNING
Improper or lack of use of the turn signals, or forgetting to deactivate
them can confuse other road users. This could result in a serious acci-
dent.
● Always give warning when you are going to change lane, overtake or
when turning, activating the turn signal in good time.
● As soon as you have finished changing lane, overtaking or turning,
switch the turn signal off.
WARNING
Incorrect use of the headlights may cause accidents and serious injury,
as the main beam may distract or dazzle other drivers. 
1
2
3
4
Safety FirstOperating instructionsPractical TipsTechnical specifications

108Lights and visibility
Note
● The turn signal only works when the ignition is switched on. The hazard
warning lights also work when the ignition is switched off.
● If a trailer turn signal malfunctions, the control lamp will stop flashing
(trailer turn signals) and the vehicle turn signal will flash at double speed.
● The main beam headlights can only be switched on if the dipped beam
headlights are already on. 
Turning lights on and off
Fig. 60 Dash panel:
Light switch
The legal requirements regarding the use of vehicle lights in each country
must be observed.
Turn the light switch to the required position ⇒ Fig. 60:
Symbolif the ignition is switched offwhen the ignition is on
Fog lights, dipped beam and
side lights off.Light off, or daytime driving light
on.

The “Coming home” and
“Leaving home” guide lights
may be switched on.Automatic control of dipped
beam and daytime driving light.
Symbolif the ignition is switched offwhen the ignition is on
Side light on.Side light on.

Dipped beam off; if necessa-
ry, the side light comes on for
a time.Dipped beam switched on.
Fog lights
The control lamps
 or  also show, on the light switch or instrument pan-
el, when the fog lights are on.
● Switching on the fog lights : pull the light switch to the first stop, from
positions ,  or .
● Switching on the rear fog light : pull the light switch completely from
position ,  or .
● To switch off the fog lights, press the light switch or turn it to position .
Audible warnings to advise the driver that the lights have not been
switched off
If the key is not in the ignition and the driver door is open, an audible warn-
ing signal is heard in the following cases: This is a reminder to turn off the
lights.
● When the parking light is on ⇒ page 107.
● When the light switch is in position  or .
WARNING
The side lights or daytime driving lights are not bright enough to illumi-
nate the road ahead and to ensure that other road users are able to see
you.
● Always use your dipped beam head lights if it is raining or if visibility
is poor.


109
Lights and visibility
Lights and visibility: functions
Parking light
When the parking light is switched on, (right or left turn signal), the front
side light and the rear light on the corresponding side of the vehicle stay lit.
The parking lights can only be activated with the ignition switched off and
the turn signal and main beam lever in the central position, before being
triggered.
Parking light on both sides
With the ignition switched off and the light switch in position , when lock-
ing the vehicle from the outside, the parking lights on both sides of the ve-
hicle light up. In doing so, only the side lights of both headlights light up,
and additionally the tail lights will do so partially.
Daytime driving light*
The daytime driving lights consist of individual lights, integrated in the front
headlights. With the daylight driving lights on, only these lights switch on
⇒ 
.
The daytime driving lights switch on every time the ignition is switched on,
if the switch is in positions  or , according to the level of exterior light-
ing.
When the light switch is in position , a light sensor automatically
switches dipped beam on and off (including the control and instrument
lighting) or the daytime driving lights depending on the level of exterior
lighting.
Automatic dipped beam control 
The automatic dipped beam control is merely intended as an aid and is not
able to recognise all driving situations. When the light switch is in position 
, the vehicle lights and the instru-
ment panel and switch lighting switch on and off automatically in the fol-
lowing situations ⇒ 
:
Automatic switching on:Automatic switching off:The photo sensor detects darkness,
for example, when driving through a
tunnel.When adequate lighting is detected.
The rain sensor detects rain and ac-
tivates the windscreen wipers.When the windscreen wipers have
been inactive for a few minutes.
Cornering lights* 1)
When turning slowly or on very tight bends, the cornering lights are activa-
ted automatically. The cornering lights may be integrated in the fog lights
and are switched on only at speeds of less than 40 km/h (25 mph).
When reverse gear is engaged, the cornering lights on both sides of the ve-
hicle switch on, in order to better illuminate the area for parking.
Motorway lights*
The motorway lights are available on vehicles equipped both with full-LED
lights and headlights that switch on automatically.
● They are activated when the light switch is in position .
● They are deactivated when the light switch is not in position .
When going above 110 km/h (75 mph) for more than 30 seconds, the dip-
ped beam raises slightly to increase the distance of visibility of the driver.
When reducing the speed of the car below 100 km/h (60 mph), the dipped
beam returns to its normal position. 
1)
This function is not available on vehicles equipped with full-LED headlights.
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110Lights and visibility
WARNING
If the road is not well lit and other road users cannot see the vehicle well
enough or at all, accidents may occur.
● The automatic dipped beam control ( ) only switches on the dip-
ped beam when there are no changes in brightness, and not, for example
when it is foggy.
● Never drive with daytime lights if the road is not well lit due to weath-
er or lighting conditions. Daytime lights do not provide enough light to
illuminate the road properly or be seen by other road users.
● The rear lights do not come on with the daytime driving light. A vehi-
cle which does not have the rear lights on may not be visible to other
drivers in the darkness, in the case of heavy rain or in conditions of poor
visibility.
Note
In cold or damp weather conditions, the headlights, tail lights and turn sig-
nals may mist up inside temporarily. This is normal and in no way effects
the useful life of the vehicle lighting system. Hazard warning lights

The hazard warning lights are used to draw the attention of
other road users to your vehicle in emergencies.
Fig. 61 Dash panel:
switch for hazard warn-
ing lights
If your vehicle breaks down:
1. Park your vehicle at a safe distance from moving traffic.
2. Press the button to switch on the hazard warning lights ⇒ 
.
3. Switch the ignition off.
4. Apply the handbrake.
5. On a manual gearbox engage 1st gear. On an automatic gear- box, move the selector lever to P.
6. Use the warning triangle to draw the attention of other road users to your vehicle. 

111
Lights and visibility
7. Always take the vehicle key with you when you leave the vehi- cle.
Switch on the hazard warning lights to warn other road users, for example:
● reaching the tail end of a traffic jam,
● there is an emergency
● your vehicle breaks down due to a technical fault,
● you are towing another vehicle or your vehicle is being towed.
All turn signals flash simultaneously when the hazard warning lights are
switched on. The two turn signal turn signal lamps   and the turn signal
lamp in the switch  will flash at the same time. The hazard warning lights
also work when the ignition is switched off.
Emergency braking warning
If the vehicle is braked suddenly and continuously at a speed of more than
80 km/h (50 mph), the brake light flashes several times per second to warn
vehicles driving behind. If you continue braking, the hazard warning lights
will come on automatically when the vehicle comes to a standstill. They
switch off automatically when the vehicle starts to move again.
WARNING
● The risk of an accident increases if your vehicle breaks down. Always
use the hazard warning lights and a warning triangle to draw the atten-
tion of other road users to your stationary vehicle.
● Never park where the catalytic converter could come into contact with
inflammable materials under the vehicle, for example dry grass or spilt
petrol. This could start a fire!
Note
● The battery will run down if the hazard warning lights are left on for a
long time, even if the ignition is switched off.
● The use of the hazard warning lights described here is subject to the rel-
evant statutory requirements. 
Main beam assist*
Main beam assist (Light Assist)
The main beam assist operates, within the limits of the system and depend-
ing on the environmental and traffic conditions, as of a speed of 60 km/h
(40 mph) when it switches on automatically, and is then deactivated again
below 30 km/h (20 mph) ⇒ 
. This is managed via a camera situated on
the base of the interior rear vision mirror.
The main beam assist generally detects illuminated areas and deactivates
the main beam when passing through a town, for example. 
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112Lights and visibility
Switching the main beam assist on and off
FunctionAction
Activate: 
– Switch the ignition on and turn the light switch to position
.
– From the base position, move the main beam and turn signal
lever forwards ⇒ page 107. When the warning lamp  is dis-
played on the instrument panel display, the main beam assist is
switched on.
Deacti- vate:
– Switch off the ignition.
– OR: Turn the light switch to a different position to 
⇒ page 108.
– OR: with main beam on, move the main beam and turn signal
lever backwards.
– OR: Move the main beam and turn signal lever forwards to
manually switch main beam on. The main beam assist will then
be deactivated.
Malfunctions
The following conditions may prevent the main beam headlight control from
turning off the headlights in time or from turning off altogether:
● In poorly lit towns with highly reflective signs.
● Other insufficiently lit road users (such as pedestrians or cyclists).
● On tight bends and steep slopes (bumps) and when oncoming vehicles
are partially obscured.
● When the drivers of other oncoming vehicles (such as a truck) can see
over a guard rail in the centre of the road.
● If the camera is damaged or the power supply is cut off.
● In fog, snow and heavy rain.
● With dust and sand turbulence.
● With loose gravel in the field of vision of the camera.
● When the field of vision of the camera is misted up, dirty or covered by
stickers, snow, ice...
WARNING
The convenience features of the main beam assist should not encourage
the taking of risks. The system is not a replacement for driver concentra-
tion.
● You are always in control of the main beam and adapting it to the
light, visibility and traffic conditions.
● It is possible that the main beam headlight control does not recog-
nise all driving situations and is limited under certain circumstances.
● When the field of vision of the camera is dirty, covered or damaged,
operation of the main beam control may be affected. This also applies
when changes are made to the vehicle lighting system, for example, if
additional headlights are installed.
CAUTION
To avoid affecting the operation of the system, take the following points in-
to consideration:
● Clean the field of vision of the camera regularly and make sure it is free
of snow and ice.
● Do not cover the field of vision of the camera.
● Check that the windscreen is not damaged in the area of the field of vi-
sion of the camera.
Note
Main beam and headlight flasher can be turned on and off manually at any
time with the turn signal and main beam lever ⇒ page 107. 
Adjusting the headlights
The light beam of the dipped beam lights is asymmetric: the side of the
road on which you are driving is lit more intensely. 

113
Lights and visibility
When a car that is manufactured in a country that drives on the right travels
to a country that drives on the left (or vice versa), it is normally necessary to
cover part of the headlight bulbs with stickers or to change the adjustment
of the headlights to avoid dazzling other drivers.
In such cases, the regulations specify certain light values that must be com-
plied with for designated points of the light distribution. This is known as
“Tourist light”.
The light distribution that the halogen and full-LED headlights of the SEAT
Leon range have, allows the specific “tourist light” values to be met without
the need for stickers or changes in the settings.
Note
“Tourist light” is only allowed temporarily. If you are planning a long stay in
a country that drives on the other side, you should take the vehicle to an
Authorised Technical Service to change the headlights. 
“Coming home” and “Leaving home” function (guidance
lights)*
The “Coming home” function should be switched on manually. However the
“Leaving home” function is automatically controlled by a photo sensor.
“Coming home”Necessary operations
To switch sys-
tem on:
– Switch off the ignition.
– Briefly flash the headlights for approximately one sec-
ond ⇒ page 107.
The “Coming home” lighting comes on when the driver
door is opened. The delay in switching off the headlights
is counted from when the last door or rear lid is closed.
The system
switches off:
– Automatically at the end of the delay period.
– Automatically, if 30 seconds after coming on, a vehicle
door or the rear lid remains open.
– If the light switch is turned to position .
– If the ignition is switched on.
“Leaving home”Necessary operationsTo switch sys-
tem on:– Unlock the vehicle when the light switch is in position
 and the photo sensor detects darkness.
The system
switches off:– Automatically, at the end of the delay period.
– When the vehicle is locked.
– When the light switch is turned to position .
– When the ignition is switched on.
Note
● In the Easy Connect system, the duration of the lighting can be adjus-
ted, and the function activated and deactivated ⇒ page 79 using the button 
and the function button Setup.
● When the “Coming home” function is activated, a tone can be heard
when the driver door is opened to warn that the light remains switched on. 
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115
Lights and visibility
Interior and reading lights 1)
Button/
SwitchFunction
Switches interior lights off.
Switches interior lights on.

Switches door contact control on (central position).
The interior lights come on automatically when the vehicle is
unlocked, a door is opened or the key is removed from the ig-
nition.
The lights go off a few seconds after all the doors are closed,
the vehicle is locked or the ignition is switched on.
Turning the reading light on and off
Glove compartment and luggage compartment lighting
When opening and closing the glove compartment on the front passenger
side and the rear lid, the respective light will automatically switch on and
off.
Footwell lighting*
The lights in the footwell area below the dash (driver and front passenger
sides) will switch on when the doors are opened and will decrease in inten-
sity while driving. The intensity of these lights can be adjusted using the ra-
dio menu (see Easy Connect > Adjusting Lighting > Interior lighting⇒ page 81).
Ambient light*
The ambient light in the door panel changes colour (white or red) depend-
ing on the driving mode. The intensity of these lights can be adjusted using the radio menu (see Easy Connect > Adjusting Lights > Interior lighting
⇒  page 81).
Note
The reading lights switch off when the vehicle is locked using a key or after
several minutes if the key is removed from the ignition. This prevents the
battery from discharging. 
Sun blind Introduction
WARNING
Folded sun blinds can reduce visibility.
● Always store sun blinds and visors in their housing when not in use.

1)
Depending on the level of equipment fitted in the vehicle, LEDs can be used for the follow-
ing interior lights: front courtesy light, rear courtesy light, footwell light and sun visor light.
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117
Lights and visibility
Control lamp
lights upPossible causeSolution
Windscreen wiper fluid level
too lowTop up the windscreen wiper
reservoir as soon as possible
⇒ page 121.
Several warning and control lamps should light up for a few seconds when
the ignition is switched on, signalling that the function is being verified.
They will switch off after a few seconds.
CAUTION
Failure to heed the control lamps and text messages when they appear may
result in faults in the vehicle. 
Safety FirstOperating instructionsPractical TipsTechnical specifications