2013 Seat Leon 5D ECU

252Checking and refilling levels
WARNING (Continued)
● Protect face, hands and arms by covering the cap with a large, thick
rag to protect against escaping coolant and steam.
● If it is necessary to work in the engine compartment while the engine
is running, the rotating components (for example, poly-V belt, alternator,
radiator fan) and the high voltage ignition system are an additional haz-
ard.
● Observe the following additional warnings if work on the fuel system
or the electrical system is necessary:
–Always disconnect the battery from the on-board network.
– Do not smoke.
– Never work near naked flames.
– Always keep an approved fire extinguisher immediately available.
CAUTION
When changing or topping up service fluids, make absolutely certain that
you fill the fluids into the correct reservoirs. Using the wrong fluids could
cause serious malfunctions and engine damage!
For the sake of the environment
Inspect the ground underneath your vehicle regularly so that any leaks are
detected at an early stage. If you find spots of oil or other fluids, have your
vehicle inspected at the workshop.
Note
On right-hand drive vehicles* some of the containers/reservoirs mentioned
below are located on the other side of the engine compartment. Opening the bonnet
The bonnet is released from inside the vehicle.
Fig. 153 Release lever in driver footwell and cam below the bonnet
Check that the windscreen wiper arms are not unfolded. Otherwise
the paint may be damaged.
The bonnet can only be unlocked when the driver door is open.
– Pull the lever under the dash panel in the direction of the arrow
1
⇒ Fig. 153.
– Lift the bonnet slightly ⇒ 
.
– Press the release catch under the bonnet upwards ⇒ Fig. 153
2
. This will release the arrester hook under the bonnet.
– Open the bonnet. Release the bonnet stay and secure it in fix-
ture designed for this in the bonnet. 

253
Checking and refilling levels
WARNING
Never open the bonnet if you see steam or drips of coolant being re-
leased from the engine compartment. Failure to comply could result in
burns. Wait until no steam or coolant can be seen before opening the
bonnet.

Closing the bonnet
– Slightly raise the bonnet.
– Release the bonnet stay before pressing it back into its support.
– Carefully close the bonnet.
– Press the bonnet down until it locks into place.
– Make sure that the bonnet catches onto its clasp. Do not press
down too hard ⇒ 
.
WARNING
● For safety reasons the bonnet must always be completely closed
when the vehicle is moving. Therefore, after closing the bonnet, always
check that the locking element is properly engaged. This is the case if
the bonnet is flush with the adjacent body panels.
● Should you notice that the bonnet is not safely secured when the ve-
hicle is moving, stop the vehicle immediately and close the bonnet. Fail-
ure to do so could result in an accident.
 Engine oil
General notes
The engine comes with a special, multi-grade oil that can be used all year
round.
Because the use of high-quality oil is essential for the correct operation of
the engine and its long useful life, when topping up or changing oil, use on-
ly those oils that comply with VW standards.
The specifications (VW standards) set out in the following page should ap-
pear on the container of the service oil; when the container displays the
specific standards for petrol and diesel engines together, it means that the
oil can be used for both types of engines.
We recommend that the oil change, indicated in the Maintenance Pro-
gramme, be performed by a Technical Service or a specialised workshop.
The correct oil specifications for your engine are listed in the ⇒ page 254,
Oil properties.
Service intervals
Service intervals can be flexible (LongLife service) or fixed (dependent on
time/distance travelled).
If the PR code that appears on the back of the “Maintenance Programme”
booklet is PR QI6, this means that your vehicle has the LongLife service pro-
grammed. If it lists the codes QI1, QI2, QI3, QI4 or QI7, the interval service
is dependent on time/distance travelled.
Flexible service intervals (LongLife service intervals*)
Special oils and processes have been developed which, depending on the
characteristics and individual driving profiles, enable the extension of the
oil change service (LongLife service intervals). 
Safety FirstOperating instructionsPractical TipsTechnical specifications

262Checking and refilling levels
WARNING
Never charge a battery that has frozen: replace battery! Failure to do so
may lead to an explosion.
Note
Use only the terminals in the engine compartment to charge the battery. 
Replacing the battery
The new battery should have the same specifications (am-
perage, load and voltage) as the used battery.
Your vehicle is equipped with an intelligent power management system to
control the distribution of electrical energy ⇒ page 226. The power manage-
ment function ensures that the battery is charged much more efficiently
than on vehicles without a power management system. To maintain this
function after replacing the battery, we recommend that the replacement
battery used is of the same make and type as the original fitted battery. To
make proper use of the power management function after the battery has
been changed, have the battery coded to the power management mode at a
specialised workshop.
CAUTION
● Some vehicles, for example those with the Start-Stop system* are fitted
with a special battery (AGM-type or EFB-type battery). If any other type of
battery is fitted, the Start-Stop function may be considerably reduced and
the vehicle may not stop on repeated occasions.
● Make sure that the vent hose is always attached to the original opening
on the side of the battery. Gases or battery acid can otherwise escape and
possibly cause damage.
● The battery holder and clamps must always be correctly secured. ●
Before starting any work on the battery, always observe the warnings lis-
ted under ⇒  page 260, Important safety warnings for handling a vehicle
battery.
● Do not forget to replace the battery coverings, where applicable. This
helps to protect against excess temperatures. This in turn extends the vehi-
cle service life.
For the sake of the environment
 Batteries contain toxic substances including sulphuric acid and lead. They
must be disposed of appropriately and must not be disposed of with ordi-
nary household waste. Make sure disconnected batteries cannot tip over.
Sulphuric acid could be spilt! 
Windscreen washer reservoir and wiper
blades
Windscreen washer
Fig. 158 Engine com-
partment: Windscreen
washer reservoir top 

269
Wheels and tyres
If you use tyres that are approved by SEAT you can be sure that the actual
tyre dimensions will be correct for your vehicle. If you decide to fit a differ-
ent type of tyre, you must obtain the appropriate manufacturer's certificate
from the tyre retailer to confirm that the tyres are suitable for your vehicle.
Keep this certificate in a safe place.
Your SEAT Official Service will be able to advise you on which tyres may be
fitted to your vehicle.
It is best to have all servicing of wheels and tyres performed by a special-
ised workshop. They are familiar with the procedure and have the necessary
special tools and spare parts as well as the proper facilities for disposing of
the old tyres.
WARNING
● It is very important to ensure that the tyres you have chosen have ad-
equate clearance. When selecting replacement tyres, do not rely entirely
on the nominal tyre size marked on the tyre; with some makes of tyre the
effective tyre size can differ significantly from the nominal dimensions,
even though the tyres have the same size designation. Inadequate tyre
clearance can result in damage to the tyres or the vehicle, causing a seri-
ous safety risk. It may also invalidate the vehicle's registration for use on
public roads.
● Avoid running the vehicle on tyres that are more than 6 years old. If
you have no alternative, you should drive slowly and with extra care at all
times.
● If wheel trims are fitted after the car is purchased, ensure that there
is an adequate flow of air for cooling the brake system.
For the sake of the environment
Old tyres must be disposed of according to the laws in the country con-
cerned.
Note
● Never mount used tyres if you are not sure of their “previous history”.
● For technical reasons, it is not generally possible to use the wheels from
other vehicles. In some cases, this may also be true for the same model of
wheel. 
Wheel bolts
The wheel bolts are designed to suit the rims on your car.
The wheel bolts are matched to the rims. When installing different wheels
(for instance alloy wheels or wheels with winter tyres) it is important to use
the correct wheel bolts with the right length and correctly shaped bolt
heads. This ensures that wheels are fitted securely and that the brake sys-
tem functions correctly.
The wheel bolts must be clean and turn easily.
A special adapter is required to turn the anti-theft wheel bolts*
⇒ page 279. 
Winter tyres
Winter tyres will improve the vehicles handling on snow and
ice.
– Winter tyres must be fitted on all four wheels.
– Only use winter tyres that are approved for your vehicle.
– Please note that the maximum permissible speed for winter
tyres may be lower than for summer tyres. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

283
Emergencies
– Take out the temporary spare wheel.
Chains
For technical reasons, snow chains must not be used on the temporary
spare wheel.
If you have a puncture on one of the front wheels when using snow chains,
fit the temporary spare wheel in place of one of the rear wheels. Fit the snow
chains on the rear wheel that you have removed and replace the punctured
front wheel with this wheel.
WARNING
● After fitting the temporary spare wheel, check the tyre pressures as
soon as possible. Failure to do so may cause an accident. The tyre pres-
sures are listed on the inside of the fuel tank flap.
● Do not drive at over 80 km/h (50 mph) when the temporary spare
wheel is fitted on the vehicle: risk of accident!
● Avoid heavy acceleration, hard braking and fast cornering: risk of ac-
cident!
● Never use more than one temporary spare wheel at the same time,
risk of accident.
● No other type of tyre (normal summer or winter tyre) may be fitted on
the compact temporary spare wheel rim.

Extraction of the spare wheel in vehicles with SEAT SOUND
10 speakers (with subwoofer)*
– Disassemble the subwoofer’s floor panel (carpet) as follows:
– LEON / LEON SC model: first, pull the carpet in the direction of
the backrest and then pull the carpet upwards to remove it. LEON ST Model: lift and secure the luggage compartment floor
as explained in
⇒ page 148.
– Disconnect the subwoofer’s speaker cable.
– Turn the securing wheel anti-clockwise.
– Remove the subwoofer speaker and the spare wheel.
– When replacing the spare wheel, place the subwoofer speaker
in the direction indicated by the arrow and with the word
“FRONT” facing forward.
– Reconnect the speaker cable and firmly rotate the securing
wheel clockwise so that the subwoofer system and wheel are
firmly in place. 
Jump starting Jump leads
The jump lead must have a sufficient wire cross section.
If the engine fails to start because of a discharged battery, the battery can
be connected to the battery of another vehicle to start the engine.
Jump leads
Jump leads must comply with standard DIN 72553 (see cable manufactur-
er's instructions). The wire cross section must be at least 25 mm 2
for petrol
engines and at least 35 mm 2
for diesel engines. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

299
Fuses and bulbs
– 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 Removing tail light
Fig. 192 Luggage com-
partment: Location of the
bolt securing the tail
light unit
Fig. 193 Remove rear
light unit from side panel
– Check which of the bulbs is defective.
– Open the rear lid. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

Index
A
ABSsee Anti-lock brake system . . . . . . . . . . . . 222
ACC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189 radar sensor . . . . . . . . . . . . . . . . . . . . . . . . 191
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Acoustic parking aid . . . . . . . . . . . . . . . . . . . . 217
Acoustic warnings Headlights . . . . . . . . . . . . . . . . . . . . . . . . . 111
Adaptive cruise control . . . . . . . . . . . . . . . . . . 189 control lamp . . . . . . . . . . . . . . . . . . . . . . . . 190
malfunction . . . . . . . . . . . . . . . . . . . . . . . . 190
messages on the display . . . . . . . . . . . . . . 190
radar sensor . . . . . . . . . . . . . . . . . . . . . . . . 191
Special driving situations . . . . . . . . . . . . . 199
switching off temporarily . . . . . . . . . . . . . . 198
using . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
warning lamp . . . . . . . . . . . . . . . . . . . . . . . 190
Additional electrical appliances (efficiency pro- gramme) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Adjusting front head restraints . . . . . . . . . . . . . . . . . 131
front seats . . . . . . . . . . . . . . . . . . . . . . . . . . 129
rear head restraints . . . . . . . . . . . . . . . . . . 132
Adjusting the head restraints Front head restraints . . . . . . . . . . . . . . . . . 131
Airbag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 34
curtain airbags . . . . . . . . . . . . . . . . . . . . . . . 43
Differences between front passenger frontairbag systems . . . . . . . . . . . . . . . . . . . . . 33
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . 36
Knee airbag . . . . . . . . . . . . . . . . . . . . . . . . . 39
side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 40
Air pressure (tyres) . . . . . . . . . . . . . . . . . . . . . . 265
Alarm system . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Alcantara: cleaning . . . . . . . . . . . . . . . . . . . . . 245
Ambient lighting . . . . . . . . . . . . . . . . . . . . . . . 118
Anti-dazzle rear vision mirror . . . . . . . . . . . . . . 126
Anti-freeze protection Windscreen washer system . . . . . . . . . . . . 262
Anti-lock brake system . . . . . . . . . . . . . . . . . . . 222
Anti-theft alarm . . . . . . . . . . . . . . . . . . . . . . 87, 95 see also Anti-theft alarm system . . . . . . . . . 87
Anti-theft alarm system Interior monitoring . . . . . . . . . . . . . . . . . . . . 97
Tow-away protection . . . . . . . . . . . . . . . . . . 97
Anti-theft security system . . . . . . . . . . . . . . 87, 98
Anti-theft wheel bolts . . . . . . . . . . . . . . . . . . . 279
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Aspects to take into account before starting the vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ASR see Traction control system . . . . . . . . . . . . 222 Assistance systems . . . . . . . . . . . . . . . . . . . . . 184
ACC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
adaptive cruise control . . . . . . . . . . . . . . . 189
Cruise control . . . . . . . . . . . . . . . . . . . . . . . 184
monitoring system Front Assist . . . . . . . . . 202
Parking aid . . . . . . . . . . . . . . . . . . . . . . . . . 218
Assisted starting . . . . . . . . . . . . . . . . . . . . . . . 283
Assist systems Tyre monitoring indicator . . . . . . . . . . . . . . 216
Audible warning . . . . . . . . . . . . . . . . . . . . . . . . . 21
Auto Lock (central locking) . . . . . . . . . . . . . . . . 87
Automatic car washes see Washing . . . . . . . . . . . . . . . . . . . . . . . . 238
Automatic dipped beam control . . . . . . . . . . . 112
Automatic gearbox . . . . . . . . . . . . . . . . . . . . . . 173 Backup programme . . . . . . . . . . . . . . . . . . 181
Downhill speed control . . . . . . . . . . . . . . . 178
Driving tips . . . . . . . . . . . . . . . . . . . . . . . . . 176
Kick-down feature . . . . . . . . . . . . . . . . . . . . 179
Launch Control Programme . . . . . . . . . . . . 179
Manual release of selector lever . . . . . . . . 182
Safety interlock for ignition key . . . . . . . . . 163
Selector lever lock . . . . . . . . . . . . . . . . . . . 175
Selector lever positions . . . . . . . . . . . . . . . 173
Steering wheel with gearshift paddles . . . 178
tiptronic . . . . . . . . . . . . . . . . . . . . . . . 173, 178
B
Back support . . . . . . . . . . . . . . . . . . . . . . . . . . 129
325
Index

Balanced (wheels) . . . . . . . . . . . . . . . . . . . . . . 265
Ball coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260Assisted starting . . . . . . . . . . . . . . . . . . . . 283
Charge Level . . . . . . . . . . . . . . . . . . . . . . . . 226
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Disconnecting/Connecting . . . . . . . . . . . . 260
Power Management . . . . . . . . . . . . . . . . . . 226
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 262
Winter conditions . . . . . . . . . . . . . . . . . . . . 260
Before starting the vehicle . . . . . . . . . . . . . . . . . 8
Bench seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . 259
Brake servo . . . . . . . . . . . . . . . . . . . . . . . . . 224
New brake pads . . . . . . . . . . . . . . . . . . . . . 224
Braking Brake assist system . . . . . . . . . . . . . . . . . . 222
Hill driving assistant . . . . . . . . . . . . . . . . . 168
C
Carbon components: Cleaning . . . . . . . . . . . . 241
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Care of vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 238
Care (paint care) . . . . . . . . . . . . . . . . . . . . . . . . 240
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . 230
CD-ROM player (navigation) . . . . . . . . . . . . . . 134
Central locking Anti-theft alarm . . . . . . . . . . . . . . . . . . . . . . 95
Central locking switch . . . . . . . . . . . . . . . . . 94 Electric windows . . . . . . . . . . . . . . . . . . . . . 103
Programming . . . . . . . . . . . . . . . . . . . . . . . . 93
Remote control key . . . . . . . . . . . . . . . . . . . . 92
Selective unlocking system . . . . . . . . . . . . . 92
Sliding/tilting sunroof . . . . . . . . . . . . . . . . 103
Central locking system . . . . . . . . . . . . . . . . . . . . 87 Manual locking in an emergency . . . . . . . . 99
Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Cetane number (Diesel fuel) . . . . . . . . . . . . . . 247
Changing Windscreen and rear window wiper blades . .263
Changing a bulb . . . . . . . . . . . . . . . . . . . . . . . . 293 Bulb sizes . . . . . . . . . . . . . . . . . . . . . . . . . . 293
Changing gear Engaging gears (manual gearbox) . . . . . . 172
Manual gearbox . . . . . . . . . . . . . . . . . . . . . 172
Changing main headlight main beam . . . . . . . . . . . . . . . . . . . . . . . . . 296
turn signal . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Changing main headlight bulbs daylight bulb . . . . . . . . . . . . . . . . . . . . . . . 295
Dipped beam . . . . . . . . . . . . . . . . . . . . . . . 295
Changing the battery of the vehicle key . . . . . . . . . . . . . . . . . . . . . 91
Chassis number . . . . . . . . . . . . . . . . . . . . . . . . 305
Child-proof lock Electric windows . . . . . . . . . . . . . . . . . . . . . 102
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Child seat Categorisation in groups . . . . . . . . . . . . . . . 50
Group 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Group 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Group 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Groups 0 and 0+ . . . . . . . . . . . . . . . . . . . . . . 50
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 48
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . 55
on the front passenger seat . . . . . . . . . . . . . 32
Top Tether system . . . . . . . . . . . . . . . . . 55, 56
City emergency braking function . . . . . . . . . . . 206
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238 Alcantara . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Carbon components . . . . . . . . . . . . . . . . . . 241
Display/Easy Connect control panel . . . . . 242
Exhaust pipe . . . . . . . . . . . . . . . . . . . . . . . . 242
Leather . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Plastic parts . . . . . . . . . . . . . . . . . . . . 240, 242
Radio display . . . . . . . . . . . . . . . . . . . . . . . 242
Rims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Trim parts . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Trims . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Washing the vehicle . . . . . . . . . . . . . . . . . . 238
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Windscreen and rear window wiper blades . .263
Cleaning/De-icing the windows . . . . . . . . . . . 241
Cleaning the rims . . . . . . . . . . . . . . . . . . . . . . . 241
Cleaning the upholstery Natural leather . . . . . . . . . . . . . . . . . . . . . . 244
Closing Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Panoramic sliding sunroof . . . . . . . . . . . . . 106
Panoramic sunroof . . . . . . . . . . . . . . . . . . . 106
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
326 Index