lights Seat Leon 5D 2012 Repair Manual

250Fuses and bulbs
–Unlock the fuse cover ⇒ Fig. 132.
– Remove the clips from the fuse cover.
– Use the plastic clip to pull out the fuse and replace the blown
fuse with a fuse of the same rating.
The individual electrical circuits are protected by fuses. Fuses are located
under a cover below the steering wheel on the left side of the engine com-
partment.
WARNING
Do not repair fuses, and never replace a blown fuse with a higher amper-
age fuse. The electrical system could be damaged, with risk of fire.
CAUTION
● Multiple fuse values on the same line (for example, 5/10/20) in the fol-
lowing tables indicate equipment-related differences. Replace the blown
fuse with a fuse of the same amperage.
● If a newly replaced fuse blows again after a short time, the electrical sys-
tem must be checked by a specialised workshop as soon as possible.
Note
● Positions are not occupied by a fuse do not appear in the following ta-
bles.
● Some of the equipment listed in the tables below pertain only to certain
versions of the model or are an optional extra. Fuses in the vehicle interior
No.Electrical consumerAmpsF2Vacant-F4Alarm10F5Gateway5F6Anti-theft alarm system5
F7Air conditioner/heating control panel, selector
lever (automatic gearbox), relay coil, rear win-
dow heating, additional heating10
F8Diagnosis, handbrake switch, light switch, re-
verse light, interior lighting10
F9Vacant-F10Radio display10F11Vacant-F12Radio20F13Vacant-F14Air conditioner fan40F15Vacant-F16Vacant-F17Instrument panel5F18Vacant-F19Vacant-F20Vacant-F23Right lights40F24Sunroof30F25Left door30F26Heated seats30F27Vacant-F28Vacant-


251
Fuses and bulbs
No.Electrical consumerAmpsF29Vacant-F30Vacant-F31Left lights40F32Parking aid control unit7,5F33Airbag5
F34Reverse switch, clima sensor, electrochromic
mirror7,5
F35Diagnosis, headlight control unit, headlight ad-
juster10
F36Front camera10F37Vacant-F38Vacant-F39Right door30F4012V socket20F41Steering column20F42Central locking40F43Interior light30F44Vacant-F45Vacant-F47Rear window wiper15F49Starter motor; clutch sensor5F51Vacant-F53Heated rear window30
The electric windows and electric seats* are protected by circuit breakers.
These switch on again automatically after a few seconds when the overload
(caused for example by frozen windows) has been corrected.
Note
Please note that the above list, while correct at the time of printing, is sub-
ject to alterations. 
Fuses on left side of engine compartment
No.Electrical consumerAmpsF1Vacant-F2ESC control unit40F3Engine control unit (diesel/petrol)15/30F4Engine sensors5/10F5Engine sensors7,5/10F6Brake light sensor5F7Engine power supply5/10F8Lambda probe10F9Engine5/10/20F10Fuel pump control unit15/20F11PTC40F12PTC40F13Automatic gearbox control unit15/30F15Horn15F16Fuel pump control unit20F17Engine control unit7,5F18Terminal 30 (positive reference)5F19Front windscreen washer30F20Alarm horn10F22Engine control unit5F23Starter motor30 
Safety FirstOperating instructionsPractical TipsTechnical specifications

252Fuses and bulbs
No.Electrical consumerAmpsF24PTC40F31Vacant-F32Vacant-F37Vacant-
Note
Please note that the above list, while correct at the time of printing, is sub-
ject to alterations. 
Bulbs
Changing a bulb
Changing bulbs requires a certain degree of practical skill. If you choose to change engine compartment lamps yourself, remember
that it is a dangerous area ⇒ 
in Working on components in the engine
compartment on page 209.
Always use identical bulbs with the same designation. The name can be
found on the base of the bulb holder.
Depending on how equipped the vehicle is, there are different sets of head-
lights and tail lights:
● Halogen headlights
● Full-LED main headlights*
● Rear bulb light
● LED rear light* Full-LED headlight system*
Full-LED headlights handle all light functions (daylight, side light, turn sig-
nal, dipped beam and route light) with light emitting diodes (LEDs) as a
light source.
Full-LED headlights are designed to last the lifetime of the car and light
bulbs cannot be replaced. In case of headlight failure, go to an authorised
workshop to have it replaced.
Bulbs (12 V)
Halogen headlightsTypeDaytime driving light/side lightP21W SLLDipped beam headlightsH7 LLMain beam headlightsH7 LLTurn signalPY21W LL
Full-LED main headlightsTypeNo bulbs may be replaced. All functions are
with LEDs
Front fog lightTypeFog light/cornering*H8
Rear bulb lightTypeBrake lights/tail lightsP21W LLSide lights2x W5W LLTurn signalPY21W LLRear fog lightH21WReverse lightsP21W LL
LED rear lightTypeTurn signalPY21W LLRear fog lightH21W


253
Fuses and bulbs
LED rear lightTypeReverse lightsP21W LLThe remaining functions work with LEDs
WARNING
● Take particular care when working on components in the engine com-
partment if the engine is warm. Risk of burns.
● Bulbs are highly sensitive to pressure. The glass can break when you
touch the bulb, causing injury.
● When changing bulbs, please take care not to injure yourself on sharp
edges, in particular on the headlight housing.
CAUTION
● Remove the ignition key before working on the electric system. Other-
wise, a short circuit could occur.
● Switch off the lights or parking lights before you change a bulb.
● Take good care to avoid damaging any components.
For the sake of the environment
Please ask your specialist retailer how to dispose of used bulbs in the prop-
er manner.
Note
● Please check at regular intervals that all lighting (especially the exterior
lighting) on your vehicle is functioning properly. This is not only in the inter-
est of your own safety, but also that of all other road users.
● Before changing a bulb, make sure you have the correct new bulb.
● Do not touch the glass part of the bulb with your bare hands, use a cloth
or paper towel instead. Otherwise, the fingerprints left on the glass will va-
porise as a result of the heat generated by the bulb, they will be deposited
on the reflector and will impair its surface. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

254Fuses and bulbs
Changing bulbs in headlight unit
Dipped beam bulb
Fig. 133 Dipped beam
headlights
Fig. 134 Dipped beam
headlights
– Raise the bonnet
– Move the loops ⇒ Fig. 133 1
in the direction of the arrow and
remove the cover.
– Remove connector ⇒ Fig. 134 2
from the bulb. –
Unclip the retainer spring ⇒ Fig. 134 3
pressing inwards to the
right.
– Extract the bulb and fit the replacement so that the rim of the
attachment plate is on the reflector cut-out. 
Daylight bulb
Fig. 135 Daylight bulb
– Raise the bonnet.
– Turn bulb holder ⇒ Fig. 135 A
to the left and pull.
– Remove the bulb by pressing on the bulb holder and turning it
anti-clockwise at the same time.
– Installation involves all of the above steps in reverse sequence. 

257
Fuses and bulbs
Remove the bulb holder
Fig. 142 Front fog light
– Remove connector ⇒ Fig. 142 A
from the bulb.
– Turn bulb holder ⇒ Fig. 142 B
to the left and pull.
– Remove the bulb by pressing on the bulb holder and turning it
anti-clockwise at the same time.
– Installation involves all of the above steps in reverse sequence.
– Check that the bulb works properly. Changing tail light bulbs (on side panel)
Overview of tail lights
Rear lights on the side panel
Turn signalPY21W NA LLSide light and brake lightP21W LL
Safety FirstOperating instructionsPractical TipsTechnical specifications

259
Fuses and bulbs
Remove the bulb holder
When changing a bulb, you must first remove the bulb hold-
er.
Fig. 145 Retaining tabs
on reverse side of tail
light
– Remove the bulb holder ⇒ Fig. 145 unlocking the A
retaining
tabs.
– Raise the bulb holder.
– Change the defective bulb.
– To refit follow the steps in reverse order, taking special care
when fitting the bulb holder. And especially that all retaining
tabs are properly in place.
– Place the light back into place and tighten with a screwdriver.
Note
In the case of LED lights, change only the turn signal bulb. 
Changing tail light bulbs (on rear lid)
Overview of tail lights
Rear lid lights 1)
Left sideSide lights2x W5W LLFog lightsH21 WRight sideSide lights2x W5W LLReverse lightP21W LL
1)
The above table corresponds to a right-hand traffic vehicle. The position of lights may vary
according to the country.
Safety FirstOperating instructionsPractical TipsTechnical specifications

261
Fuses and bulbs
Note
For LED pilots, you can only change the fog or reverse bulb, on the left or
right guide. 
Fitting the bulb holder
– Install the bulb holder making sure that locking clips ⇒ Fig. 147
A are properly clipped on.
– Replace the cover of the rear lid lining ⇒ Fig. 146.
Changing number plate light bulbs 1)
Fig. 149 In the rear
bumper: number plate
light
Fig. 150 Number plate
light: remove the bulb
holder
Follow the steps indicated:
1. Press the number plate light in the direction of the arrow ⇒ Fig. 149.
2. Remove the number plate bulb slightly.
3. In the connector lock, turn ⇒ Fig. 150 towards arrow A
and pull
the connector.
4. Rotate the bulb holder in the direction of arrow B
and extract it
with the bulb.
5. Replace the defective bulb with a new bulb with the same fea- tures.
6. Insert the bulb holder in the number plate light and turn in the opposite direction of arrow B
until it stops. 
1)
Depending on how equipped the vehicle is, the number plate lights may be LEDs. LEDs
have an estimated life that exceeds than that of the car. If a light with LEDs fails, go to an
authorised workshop for replacement.
Safety FirstOperating instructionsPractical TipsTechnical specifications

Index
A
ABSsee Anti-lock brake system . . . . . . . . . . . . 183
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Acoustic parking aid . . . . . . . . . . . . . . . . . . . . 178
Acoustic warnings Headlights . . . . . . . . . . . . . . . . . . . . . . . . . 108
Additional electrical appliances (efficiency pro- gramme) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Adjusting the head restraints . . . . . . . . . . . . . . . . . . . 128
Adjusting the head restraint Front head restraint . . . . . . . . . . . . . . . . . . 127
Airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 33
Curtain airbags . . . . . . . . . . . . . . . . . . . . . . . 42
Differences between front passenger frontairbag systems . . . . . . . . . . . . . . . . . . . . . 32
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . 35
Knee airbag . . . . . . . . . . . . . . . . . . . . . . . . . 38
side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 39
Air pressure (tyres) . . . . . . . . . . . . . . . . . . . . . . 223
Alarm system . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Alcantara: cleaning . . . . . . . . . . . . . . . . . . . . . 204
Ambient lighting . . . . . . . . . . . . . . . . . . . . . . . 115
Anti-dazzle rear vision mirror . . . . . . . . . . . . . . 123 Anti-dazzle rear vision mirrors
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Anti-freeze protection Windscreen washer system . . . . . . . . . . . . 220
Anti-lock brake system . . . . . . . . . . . . . . . . . . . 183
Anti-theft alarm . . . . . . . . . . . . . . . . . . . . . . 86, 93 see also Anti-theft alarm system . . . . . . . . . 86
Anti-theft alarm system Interior monitoring . . . . . . . . . . . . . . . . . . . . 95
Tow-away protection . . . . . . . . . . . . . . . . . . 95
Anti-theft security system . . . . . . . . . . . . . . 86, 97
Anti-theft wheel bolts . . . . . . . . . . . . . . . . . . . 237
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Aspects to take into account before starting the vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ASR see Traction control system . . . . . . . . . . . . 183
Assistance systems . . . . . . . . . . . . . . . . . . . . . 164 Cruise control . . . . . . . . . . . . . . . . . . . . . . . 164
Parking aid . . . . . . . . . . . . . . . . . . . . . . . . . 179
Assisted starting . . . . . . . . . . . . . . . . . . . . . . . 241
Assist systems Tyre monitoring indicator . . . . . . . . . . . . . . 177
Audible warning . . . . . . . . . . . . . . . . . . . . . . . . . 20
Auto Lock (central locking) . . . . . . . . . . . . . . . . 86
Automatic car washes see Washing . . . . . . . . . . . . . . . . . . . . . . . . 198
Automatic dipped beam control . . . . . . . . . . . 109 Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . 154
Backup programme . . . . . . . . . . . . . . . . . . 162
Downhill speed control . . . . . . . . . . . . . . . 158
Driving tips . . . . . . . . . . . . . . . . . . . . . . . . . 156
Kick-down feature . . . . . . . . . . . . . . . . . . . . 160
Launch Control Programme . . . . . . . . . . . . 160
Manual release of selector lever . . . . . . . . 163
Safety interlock for ignition key . . . . . . . . . 144
Selector lever lock . . . . . . . . . . . . . . . . . . . 155
Selector lever positions . . . . . . . . . . . . . . . 154
Steering wheel with gearshift paddles . . . 159
tiptronic . . . . . . . . . . . . . . . . . . . . . . . 154, 159
B
Balanced (wheels) . . . . . . . . . . . . . . . . . . . . . . 223
Ball coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 Assisted starting . . . . . . . . . . . . . . . . . . . . 241
Charge Level . . . . . . . . . . . . . . . . . . . . . . . . 187
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Disconnecting/Connecting . . . . . . . . . . . . 217
Power Management . . . . . . . . . . . . . . . . . . 187
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 219
Winter conditions . . . . . . . . . . . . . . . . . . . . 217
Before starting the vehicle . . . . . . . . . . . . . . . . . 8
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Bioethanol see Ethanol (fuel) . . . . . . . . . . . . . . . . . . . . 206
277
Index

Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . 217
Brake servo . . . . . . . . . . . . . . . . . . . . . . . . . 185
New brake pads . . . . . . . . . . . . . . . . . . . . . 185
Braking Brake assist system . . . . . . . . . . . . . . . . . . 183
Moving off on a hill . . . . . . . . . . . . . . . . . . 148
C
Carbon components: Cleaning . . . . . . . . . . . . 200
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Care of vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 198
Care (paint care) . . . . . . . . . . . . . . . . . . . . . . . . 200
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . 190
CD-ROM reader (navigation) . . . . . . . . . . . . . . 130
Central locking Anti-theft alarm . . . . . . . . . . . . . . . . . . . . . . 93
Central locking switch . . . . . . . . . . . . . . . . . 93
Electric windows . . . . . . . . . . . . . . . . . . . . . 101
Programming . . . . . . . . . . . . . . . . . . . . . . . . 92
Remote control key . . . . . . . . . . . . . . . . . . . . 91
Selective unlocking system . . . . . . . . . . . . . 91
Sliding/tilting sunroof . . . . . . . . . . . . . . . . 101
Central locking system . . . . . . . . . . . . . . . . . . . . 86 Manual locking in an emergency . . . . . . . . 97
Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Cetane number (Diesel fuel) . . . . . . . . . . . . . . 207
Changing Windscreen and rear window wiper blades . .221
Changing a bulb . . . . . . . . . . . . . . . . . . . . . . . . 252 Bulb sizes . . . . . . . . . . . . . . . . . . . . . . . . . . 252 Changing gear
Engaging gears (manual gearbox) . . . . . . 152
Manual gearbox . . . . . . . . . . . . . . . . . . . . . 152
Changing main headlight main beam . . . . . . . . . . . . . . . . . . . . . . . . . 255
turn signal . . . . . . . . . . . . . . . . . . . . . . . . . . 255
Changing main headlight bulbs daylight bulb . . . . . . . . . . . . . . . . . . . . . . . 254
Dipped beam . . . . . . . . . . . . . . . . . . . . . . . 254
Changing the battery of the vehicle key . . . . . . . . . . . . . . . . . . . . . 90
Chassis number . . . . . . . . . . . . . . . . . . . . . . . . 264
Child-proof lock Electric windows . . . . . . . . . . . . . . . . . . . . . 100
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Child seat Categorisation in groups . . . . . . . . . . . . . . . 49
Group 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Group 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Group 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Groups 0 and 0+ . . . . . . . . . . . . . . . . . . . . . . 49
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 47
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . 54
on the front passenger seat . . . . . . . . . . . . . 31
Top Tether system . . . . . . . . . . . . . . . . . 54, 55
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198 Alcantara . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Carbon components . . . . . . . . . . . . . . . . . . 200
Display/Easy Connect control panel . . . . . 202
Exhaust pipe . . . . . . . . . . . . . . . . . . . . . . . . 201 Leather . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Plastic parts . . . . . . . . . . . . . . . . . . . . 200, 202
Radio display . . . . . . . . . . . . . . . . . . . . . . . 202
Rims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Trim parts . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Trims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Washing the vehicle . . . . . . . . . . . . . . . . . . 198
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Windscreen and rear window wiper blades . .221
Cleaning/De-icing the windows . . . . . . . . . . . 201
Cleaning the rims . . . . . . . . . . . . . . . . . . . . . . . 201
Cleaning the upholstery Natural leather . . . . . . . . . . . . . . . . . . . . . . 203
Closing Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Panoramic sliding sunroof . . . . . . . . . . . . . 103
Panoramic sunroof . . . . . . . . . . . . . . . . . . . 103
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Clutch (warning lamp) . . . . . . . . . . . . . . . . . . . 162
Coming Home . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Compartments . . . . . . . . . . . . . . . . . . . . . . . . . 129
Consumption (fuel) . . . . . . . . . . . . . . . . . . . . . 264
Control lamp Airbag system . . . . . . . . . . . . . . . . . . . . . . . . 33
Cruise control . . . . . . . . . . . . . . . . . . . . . . . 164
Tyre monitor indicator warning lamp . . . . 175
Tyre monitoring systems . . . . . . . . . . . . . . 175
Windscreen wiper fluid level . . . . . . . . . . . 117
Control lamps Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Control of function Rain sensor . . . . . . . . . . . . . . . . . . . . . . . . . 120
278 Index