2013 Seat Exeo ST bulb

282If and when
● Main headlight lamps: Xenon ⇒ 
lights.
● Sources of the DRL (daylight) light unit and position.
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.
● The high voltage element of gas discharge bulbs* (xenon light) must
be handled correctly. Otherwise, there is a risk of death.
● When changing bulbs, please take care not to injure yourself on sharp
parts in 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.
For the sake of the environment
Please ask your specialist retailer how to dispose of used bulbs in the prop-
er manner.
Note
● Depending on weather conditions (cold or wet), the front lights, the fog
lights, the tail lights and the turn signals may be temporarily misted. This
has no influence on the useful life of the lighting system. By switching on
the lights, the area through which the beam of light is projected will quickly
be demisted. However, the edges may continue to be misted.
● 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 in 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. 
Removing the air duct
The air duct has to be removed to gain access to the bulbs
for the right-side headlight.
Fig. 217 Air duct on
right side of vehicle
– Unscrew bolts A
⇒ Fig. 217.
– Detach air duct from guide B
and take it out. 

283
If and when
Fitting the air duct
Once the bulb(s) for the right-side headlight have been
changed, the air duct must be re-installed.
Fig. 218 Air duct on
right side of vehicle
– Place the air duct in the correct position.
– First turn the two screws A
in lightly, then tighten both screws.
– Push the air duct into guide B
. Bi-Xenon AFS headlight bulbs
Fig. 219 Bi-Xenon AFS
headlight bulbs
Turn signal
Xenon headlight (dipped beam/main beam) 
A
B
Safety FirstOperating instructionsPractical TipsTechnical Specifications

284If and when
Changing the turn signal bulb
The procedure for changing the bulb is the same on both
sides of the vehicle.
Fig. 220 Turn signal
bulb
Fig. 221 Turn signal
bulb
– Switch off the ignition and the lights. –
Raise the bonnet.
– Pull the rubber cap ⇒ Fig. 220 to remove it.
– Remove the bulb holder by pulling on the grip and turning it an-
ticlockwise ⇒ Fig. 221.
– Replace the blown bulb in the bulb holder (press and turn anti-
clockwise to remove) with a new bulb (press and turn clockwise
to insert).
– Insert the bulb holder into the socket with the tab facing up-
wards and the grip horizontal. Press it against the socket and
turn clockwise. When changing the bulb, you can check the po-
sition of the bulb through the headlight glass.
– Fit the rubber cap and tighten, making sure it fit properly into
the headlight casing.
– Check whether the new bulb is working. 
Changing the xenon bulb
The procedure for changing the bulb is the same on both sides of the vehi-
cle.
WARNING
This type of bulb should be changed at a specialised workshop.


285
If and when
Changing tail light bulbs (on side panel)
Overview of tail lights
Fig. 222 Overview of tail
lights
Tail lights on side panel
● Brake lights and side lights
● Turn signal Overview of tail lights. LED lamps
Fig. 223 Overview of tail
lights
Tail lights on side panel
● Brake lights and side lights
● Turn signal
Note
● It is only possible to change the turn signal light.
● If the warning lamp for the side light and/or rear fog light (LED lights)
lights up, the tail light assembly should be replaced.
● The failure of the lamp is only shown when the LED function goes out
completely. Sometimes, a LED will stop working, without displaying the
warning as the function continues to operate. 
Safety FirstOperating instructionsPractical TipsTechnical Specifications

286If and when
Removing tail light
To change the bulbs you must remove the tail light assem-
bly. Removing the light requires a certain degree of practical
skill.
Fig. 224 Luggage com-
partment: Location of the
bolt securing the tail
light unit
Fig. 225 Remove rear
light unit from side panel A special retaining screw is used to secure and guide the tail light.
–
Check which of the bulbs is defective.
– Open the rear lid.
– Prise off the cover with a screwdriver in the slot ⇒ Fig. 224 1
and remove the cover (with all the retaining clips) from the
opening.
– Carefully loosen the screw located behind the cover with a
screwdriver, turning it anticlockwise (arrows) 2
.
– Gradually ease the tail light out of the housing ( ⇒ Fig. 225 posi-
tions 3
and 4) by pulling alternately in positions 1 and 2.
– Remove the bulb holder ⇒ page 287.
CAUTION
When removing or installing the tail light, take care not to cause any dam-
age.
● Removing the tail light in particular can lead to the paintwork or tail light
becoming damaged. This is another reason why we recommend having the
bulbs changed by a specialised workshop.
Note
Make sure you have a soft cloth ready to place under the glass on the rear
light unit, to avoid any scratches. 

287
If and when
Remove the bulb holder
When changing a bulb, you must first remove the bulb hold-
er.
Fig. 226 Retaining tabs
on reverse side of tail
light
There are four securing tabs on the inside of the tail light unit.
– Release the retaining tabs A
⇒ Fig. 226.
– Lift the bulb carrier off in direction of the arrow B
.
– Change the defective bulb ⇒ page 287 ⇒ page 288.
WARNING
If a bulb is replaced in a tail light assembly with LED, do not pull too hard
on the bulb holder. This may damage the wiring of the LED module.
 Changing bulbs
All bulbs can be changed easily in the bulb holder.
Fig. 227 Position of the
bulbs in the bulb holder:
Example: Outer left tail
light
The bulbs are secured with a bayonet fastener. The table below
gives an overview of the bulb positions.
– Lightly press the defective bulb into the bulb holder, then turn it
to the left and remove it.
– Fit the new bulb, pressing it into the bulb holder and turn it to
the right as far as it will go.
– Use a cloth to remove any fingerprints from the glass part of the
bulb.
– Check that the new bulb works properly.
– Re-install the bulb holder ⇒ page 288. 
Safety FirstOperating instructionsPractical TipsTechnical Specifications

288If and when
Position of the bulbs
Pos.
⇒ Fig. 227Bulb function
ATurn signalP21WBBrake lights and side lightsP21W LL
Changing bulbs. LED lamps
All bulbs can be changed easily in the bulb holder.
Fig. 228 Position of the
bulbs in the bulb holder:
Example: Outer left tail
light
The bulb is secured with a bayonet fastening. The table below
gives an overview of the bulb positions.
– Lightly press the defective bulb into the bulb holder, then turn it
to the left and remove it.
– Fit the new bulb, pressing it into the bulb holder and turn it to
the right as far as it will go. –
Use a cloth to remove any fingerprints from the glass part of the
bulb.
– Check that the new bulb works properly.
– Re-install the bulb holder ⇒ page 288.
Position of the bulbs
Pos.
⇒ Fig. 228Bulb function
ATurn signalPY21W
Fitting the bulb holder
The bulb holder is easy to fit.
Fig. 229 Securing the
bulb holder in the tail
light unit
– Check that the seal is seated correctly on the bulb holder. 

289
If and when
– Position the bulb holder on the tail light and align it so that it is
securely seated.
– Press the bulb holder into the tail light until it engages.
– Check that all four retaining tabs ⇒ Fig. 229 -arrows- have en-
gaged.
– Re-install the tail light unit ⇒ page 289. 
Fitting the tail light unit
The tail light unit is easy to fit.
Fig. 230 Fitting the tail
light unit
Fig. 231 Luggage com-
partment: Location of the
bolt securing the tail
light unit
– First place the tail light unit in ⇒ Fig. 230 arrow 1
in the hous-
ing.
– Gently press the tail light unit against the housing, first in posi-
tion 2
and then in position 3, until that the clips engage firm-
ly in the rubber mountings.
– Apply gentle pressure to the upper part of the tail light unit and
secure using the screwdriver, from the luggage compartment
⇒ Fig. 231 1
.
– Try to move the tail light sideways to ensure it is correctly fitted.
– Fit the cover back onto the screw, with the notch pointing to the
rear 2
.
– Make sure that all bulbs for the tail lights are working. 
Safety FirstOperating instructionsPractical TipsTechnical Specifications