brake Seat Leon SC 2013 Workshop Manual

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Intelligent technology
Multi-collision brake
In an accident, the multi-collision brake can help the driver by braking to
avoid the risk of skidding during the accident, which could lead to further
collisions.
The multi-collision brake works for front, side or rear accidents, when the
airbag control unit records its activation level and the accident takes place
at a speed of over 10 km/h (6 mph). The ESC automatically brakes the vehi-
cle, as long as the accident has not damaged the ESC, the brake hydraulics
or the on-board network.
The following actions control automatic braking during the accident:
● When the driver presses the accelerator. The automatic braking does not
take place.
● When the braking pressure through pressing the brake pedal is greater
than the system’s braking pressure. The vehicle will brake manually.
● Multi-collision braking will not be available if ESC is malfunctioning.
WARNING
● The ESC, ABS, ASR, EDL, electronic self-locking differential or selec-
tive torque control systems cannot exceed the limits imposed by the laws
of physics. Always bear this in mind, especially on wet or slippery roads.
If you notice the systems cutting in, you should reduce your speed imme-
diately to suit the road and traffic conditions. Do not be encouraged to
take risks by the presence of more safety systems. If you do, an accident
may occur.
● Please remember that the accident risk always increases if you drive
fast, especially in corners or on a slippery road, or if you follow too close
behind the vehicle in front of you. The ESC, ABS, brake assist, EDL, elec-
tronic self-locking and selective torque control systems cannot prevent
accidents: risk of accidents!
● Accelerate with caution on slippery surfaces (for example, icy or
snow-covered). Despite the control systems, the driven wheels could
spin, affecting the stability of the vehicle: risk of accident!
Note
● The ABS and ASR will only operate correctly if the four wheels have iden-
tical tyres. Any differences in the rolling radius of the tyres can cause the
system to reduce engine power when this is not desired.
● The regulating processes of the systems can make noises when they in-
tervene.
● If the warning lamp  lights up, or  alternatively, there could be a
fault ⇒ page 69. 
Switching on/off the ESC and ASR
The ESC is switched on automatically when the engine is
started. The ESC cannot be deactivated. ESC in “Sport Mode”
Sport mode is activated through the Easy Connect system menu ⇒ page 79.
The ability of the ESC to stabilise the vehicle is limited; the traction control
system (ASR) becomes disabled ⇒ 
.
The control lamp  will light up. For vehicles with a driver information sys-
tem*, the driver will be shown the electronic stability control (ESC) option:
sport. Warning! Limited stability .
In the following exceptional circumstances enabling the ESC Sport mode to
improve the traction of the wheels is tenable:
● “Swing” the vehicle to unblock it.
● Driving in deep snow or on loose surfaces.
Disable ESC Sport mode
Through the Easy Connect system ⇒ page 79. The warning lamp  will
switch off. For vehicles with a driver information system*, the driver will be
shown the electronic stability control (ESC) option: on .
Safety FirstOperating instructionsPractical TipsTechnical specifications

224Intelligent technology
Disable ASR
ASR mode is deactivated ⇒ page 79 through the Easy Connect system
menu. The traction control system will be disabled.
The control lamp  will light up. For vehicles with a driver information sys-
tem* the driver will be informed that ASR is disabled.
In the following exceptional circumstances enabling the ESC Sport mode to
improve the traction of the wheels is tenable:
● “Swing” the vehicle to unblock it.
● Driving in deep snow or on loose surfaces.
Activate ASR
ASR mode is activated ⇒ page 79 through the Easy Connect system menu.
The traction control system will be enabled.
The control lamp  switches off. For vehicles with a driver information sys-
tem* the driver will be informed that ASR is enabled.
WARNING
You should switch on the ESC Sport mode only if the traffic conditions
and your driving ability allow you to do so safely: risk of skidding!
● With ESC in Sport mode, the stabilising function will be limited to al-
low for a sportier drive. The driving wheels could spin and the vehicle
could skid.
Note
If the ASR is disconnected or the ESC’s Sport mode is selected, cruise con-
trol* will be switched off. Brakes
New brake pads
For the first 400 km (250 miles), new brake pads have not yet reached their
maximum braking capacity, and need to be “run in” first. However, you can
compensate for the slightly reduced braking effect by applying more pres-
sure on the brake pedal. Avoid overloading the brakes while running them
in.
Wear
The rate of wear on the
brake pads depends a great deal on how you drive
and the conditions in which the vehicle is operated. This is a particular
problem in urban traffic and short stretches, or with very sporty driving.
Depending on the speed, the braking force, and the environmental condi-
tions (for example, the temperature, air humidity, etc.) noises may be pro-
duced on braking.
Wet roads or road salt
In certain situations (for example, on driving through flooded areas, in se-
vere downpours or after washing the vehicle) the braking action could be
delayed if the discs and pads are damp, or frozen in winter. In this case the
brakes should be dried by pressing the brake pedal several times.
At high speed and with the windscreen wipers activated, the brake pads will
briefly touch the brake discs. This takes place, although unnoticeable to the
driver, at regular intervals to improve the response time of the brakes when
they are wet.
The effectiveness of the brakes can also be temporarily reduced if the vehi-
cle is driven for some distance without using the brakes when there is a lot
of salt on the road in winter. The layer of salt that accumulates on the discs
and pads can be removed by gently applying the brakes a few times. 

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Intelligent technology
Corrosion
There may be a tendency for corrosion to form on the discs and dirt to build
up on the brake pads if the vehicle is used infrequently or the brakes are
not used very often.
If the brakes are not used frequently, or if rust has formed on the disks, it is
advisable to clean off the pads and disks by braking firmly a few times at a
moderately high speed ⇒ 
.
Fault in the brake system
If the brake pedal travel should ever increase suddenly, this may mean that
one of the two brake circuits has failed. Drive immediately to the nearest
specialised workshop and have the fault repaired. Drive there slowly and re-
member that you will have to apply more pressure on the brake pedal and
allow for longer stopping distances.
Low brake fluid level
Malfunctions can occur in the brake system if the brake fluid level is too
low. The brake fluid level is monitored electronically.
Brake servo
The brake servo increases the pressure you apply to the brake pedal. It
works only when the engine is running.
WARNING
● Apply the brakes heavily to clean the brake system only in a suitable
traffic situation. Do not put other road users in danger: risk of causing an
accident.
● Ensure the vehicle does not move while in neutral, when the engine is
stopped. Failure to do so could result in an accident.
CAUTION
● Never let the brakes “drag” by leaving your foot on the pedal when it is
not necessary to brake. This overheats the brakes, resulting in longer stop-
ping distances and greater wear.
● Before driving down a long, steep gradient, it is advisable to reduce
speed and select a lower gear. This makes use of engine braking and re-
lieves the brakes. If you still have to use the brakes, it is better to brake
firmly at intervals than to apply the brakes continuously.
Note
● If the brake servo is out of action due to a malfunction, or if the car has
to be towed, you will have to press the brake pedal considerably harder to
make up for the lack of servo assistance.
● If you wish to equip the vehicle with accessories such as a front spoiler
or wheel covers, it is important that the flow of air to the front wheels is not
obstructed, otherwise the brakes can overheat. 
Electro-mechanical steering
Electro-mechanical power steering assists the driver when
steering.
Electro-mechanical power steering adapts electronically to the speed of the
car, torque and turning angle.
If the power steering should fail at any time or the engine is switched off (for
instance when being towed), the car can still be steered. However, more ef-
fort than normal will be required to turn the steering wheel.
Driver warning lamps and messages
 (in red) Faulty steering! To park the vehicle

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230Driving and the environment
Driving and the environment
Running in the engine
A new vehicle should be run in over a distance of 1500 km (1000 miles). For
the first 1000 km (600 miles) the engine speed should not exceed 2/3 of
the maximum permissible engine speed. In doing so, do not accelerate at
full throttle and do not drive with a trailer! From 1000 to 1500 km (600 to
1000 miles) you can gradually increase the engine rpm and road speed.
During its first few hours of running, the internal friction in the engine is
greater than later on when all the moving parts have bedded down.
How the vehicle is driven for the first 1500 km (1000 miles) influences the
future engine performance. Subsequently, also drive at a moderate rate, es-
pecially when the engine is still cold: this will lead to less engine wear and
tear and will prolong its useful life.
You should also avoid driving with the engine speed too low. Change down
to a lower gear when the engine no longer runs “smoothly”. If the engine
revs too much, cut fuel injection to protect the engine. 
Driving through flooded roads
To prevent damage to the vehicle when driving through water, for example,
along a flooded road, please observe the following:
● The water should never come above the lower edge of the bodywork.
● Drive at pedestrian speed.
WARNING
After driving through water, mud, sludge, etc., the braking effect can be
delayed slightly due to moisture build-up on the discs and brake pads.
Applying the brakes carefully several times will remove the moisture and
restore the full braking effect.
CAUTION
● Driving through flooded areas may severely damage vehicle compo-
nents such as the engine, transmission, running gear or electrical system.
● Whenever driving through water, the Start-Stop system* must be switch-
ed off ⇒ page 169.
Note
● Check the depth of the water before entering the flooded zone.
● Do not stop in the water, drive in reverse, or stop the engine in any sit-
uation.
● Note that vehicles travelling in the opposite direction may splash water
that could exceed the maximum permitted water height for your vehicle.
● Avoid driving through salt water (corrosion). 
Installation of exhaust gas filtration systems
Catalytic converter
Applies to vehicles with petrol engine: The vehicle must only be used with
unleaded petrol, otherwise the catalytic converter will be irreparably dam-
aged. 

231
Driving and the environment
Never drive until the tank is empty; an irregular supply of fuel can cause
faulty combustion. In these cases, unburned fuel reaches the exhaust sys-
tem, which can overheat and damage the catalytic converter.
Diesel particulate filter
Applies to vehicles with diesel engine: The diesel particulate filter can filter
out almost all soot particles contained in the exhaust gas. In normal driving
conditions the filter is self-cleaning. The Diesel particulate filter is cleaned
automatically without need for indication by the warning lamp . This may
be noticed because the engine idle speed increases and an odour may be
detected.
If automatic filter purification cannot be carried out (because only short
trips are taken, for example), soot will accumulate on the filter and the Die-
sel particulate filter warning lamp will  switch on.
Facilitate the automatic filter cleaning process by driving in the following
manner: Drive for approximately 15 minutes at a minimum speed of 60 km/
h (40 mph) in 4th or 5th gear (automatic gearbox: gear S). Maintain the en-
gine speed at approx. 2000 rpm. The rise in temperature causes the soot on
the filter to burn. On completion of the cleaning the warning lamp will
switch off. If the warning lamp does not switch off, go immediately to a spe-
cialised workshop to rectify the problem.
WARNING
● Because of the high temperatures which can occur in the exhaust gas
control system (catalytic converter or diesel particulate filter), do not
park the vehicle where the exhaust can come into contact with flamma-
ble materials under the car (e.g. on grass or at the forest edge). Fire haz-
ard!
● Do not apply wax underneath the vehicle around the area of the ex-
haust system: Fire hazard!
 Economic and ecological driving
Fuel consumption, environmental pollution and wear to the engine, brakes
and tyres depends largely on driving style. Fuel consumption can be re-
duced by 10-15% with an economical driving style and proper anticipation
of traffic conditions. The following section gives you some tips on lessening
the impact on the environment and reducing your operating costs at the
same time.
Foresight when driving
Acceleration causes the vehicle to consume more fuel. If you think ahead
when driving, you will need to brake less and thus accelerate less. Wherever
possible, let the car roll slowly to a stop, with a
gear engaged (for instance
when you can see that the next traffic lights are red). This takes advantage
of the engine braking effect, reducing wear on the brakes and tyres. Emis-
sions and fuel consumption will drop to zero due to the overrun fuel cut-off.
Changing gear to save energy
An effective way of saving is to change in advance to a higher gear. Running
the engine at high rpm in the lower gears uses an unnecessary amount of
fuel.
Manual gearbox : shift up from first to second gear as soon as possible. In
any case, we recommend that you change to a higher gear upon reaching
2000 rpm or so. Choosing the right gear enables fuel savings. Select the
highest possible gear appropriate for the driving situation (the engine
should continue functioning with cyclical regularity).
Automatic gearbox : accelerate gradually and without reaching the “kick-
down” position.
Avoid driving at high speed
Avoid travelling at top speed, whenever possible. Fuel consumption, emis-
sion of harmful gases and noise pollution multiply disproportionately as
speed is increased. Driving at moderate speeds will help to save fuel. 
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235
Trailer
Note
● Towing a trailer places additional demands on the vehicle. We recom-
mend additional services between the normal inspection intervals if the ve-
hicle is used frequently for towing a trailer.
● Find out whether special regulations apply to towing a trailer in your
country. 
Ball coupling of towing bracket*
The ball coupling is provided with instructions on fitting and removing the
ball coupling of the towing bracket.
WARNING
The towing bracket ball coupling must be stored securely in the luggage
compartment to prevent them being flung through the vehicle and caus-
ing injury.
Note
● By law, the ball coupling must be removed if a trailer is not being towed
if it obscures the number plate. 
Driving tips
Driving with a trailer always requires extra care. Weight distribution
The weight distribution of a loaded trailer with an unladen vehicle is very
unfavourable. However, if this cannot be avoided, drive extra slowly to allow
for the unbalanced weight distribution. Speed
The stability of the vehicle and trailer is reduced with increasing speed. For
this reason, it is advisable not to drive at the maximum permissible speed
in an unfavourable road, weather or wind conditions. This applies especially
when driving downhill.
You should always reduce speed immediately if the trailer shows the slight-
est sign of
snaking. Never try to stop the “snaking” by increasing speed.
Always brake in due course. If the trailer has an overrun brake, apply the
brakes gently at first and then, firmly. This will prevent the jerking that can
be caused by locking of trailer wheels. Select a low gear in due course be-
fore going down a steep downhill. This enables you to use the engine brak-
ing to slow down the vehicle.
Reheating
At very high temperatures and during prolonged slopes, driving in a low
gear and high engine speed, always monitor the coolant temperature gauge
⇒ page 69.
Electronic Stability Control*
The ESC* system helps to stabilise the trailer in case of skidding or rocking. 
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239
Care and cleaning
Washing the car by hand
When washing the car by hand, use plenty of water to soften the dirt first,
and rinse off as well as possible.
Then clean the vehicle with a soft sponge, glove or brush using only slight
pressure. You should start on the roof and work down. Special car shampoo
should only be used for very persistent dirt.
Rinse the sponge or glove thoroughly and often.
Wheels, sills and similar should be cleaned last. Use a second sponge for
this.
WARNING
● The vehicle should only be washed with the ignition switched off.
Failure to do so could result in an accident.
● Do not clean the underside of chassis, the inside of wheel arches or
wheel trims without protecting your hands and arms. You may cut your-
self on sharp-edged metal parts. Otherwise, there is a risk of sustaining
cuts.
● When washing the car during the winter season: water and ice in the
brake system can reduce braking effectiveness: risk of accident!
CAUTION
● Do not wash the vehicle in direct sunlight – otherwise the paint can be
damaged.
● Do not use sponges, abrasive household sponges or similar to clean in-
sect remains. This could damage the surface.
● Clean off stubborn dirt (insects, etc.) from the headlights at regular in-
tervals, for instance when filling the fuel tank. The headlights should only
be washed with water, do not wipe them with a dry cloth or sponge. It is
best to use soapy water. ●
Never wash tyres with a jet that sprays the water out in a direct stream.
This could damage the tyres even if the spray is kept at a distance and only
used for a very short time.
● Before washing the vehicle in an automatic car wash, please make sure
to retract the exterior mirrors to prevent them from being damaged. Electri-
cally retractable exterior mirrors must not be folded in or out by hand. Al-
ways use the electrical power control.
CAUTION
● If you wash the vehicle in an automatic car wash, proceed as follows to
lock and prevent the windscreen wiper blades from being pushed up to-
wards the top of the windscreen:
–the bonnet must be closed
– switch the ignition on and off
– press the windscreen wiper lever downwards briefly towards the front
(windscreen wiper function). The windscreen wiper blades will be
locked.
For the sake of the environment
The car should only be washed in special wash bays. This prevents oily wa-
ter from getting into the public drains. In some places, washing vehicles
anywhere else may be prohibited. 
Sensors and camera lenses
● Use a small brush to remove snow and a de-icer spray to remove ice.
● Clean the sensors with a solvent-free product and a soft, dry cloth.
● Moisten the camera lens using a standard alcohol-based glass cleaning
agent and clean the lens with a dry cloth. The area in front of the active
Lane Assist* lens area is normally cleaned with the windscreen washer. 
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241
Care and cleaning
Carbon components
The carbon parts on your vehicle have a painted surface. They do not need
any special care and are cleaned just like any other painted part
⇒ page 238. 
Paint damage
Minor damage to the paint, such as scratches or stone chips, should be
touched up without delay before the metal starts to corrode. Suitable touch-
up brushes or sprays for your car can be obtained from a SEAT Official Serv-
ice.
The number of the original paint finish on the vehicle is given on the data
sticker ⇒  page 305.
If corrosion is already visible it must be thoroughly removed by a special-
ised workshop. 
Windows
Clear vision is an essential safety factor.
The windscreen must not be cleaned with insect remover or wax, otherwise
the windscreen wipers will not function properly (juddering).
Traces of rubber, oil, grease or silicone can be removed with a window
cleaning solution or a silicone remover. Wax residue can only be removed
with a special cleaner. Your SEAT Official Service will be able to provide you
with more detailed information.
The windows should also be cleaned on the inside at regular intervals. Use a separate cloth or chamois to dry the windows. Cloths used for waxing
and polishing contain residues that will cause smears on the glass.
WARNING
Do not use water-repellent coatings on the windscreen. In bad visibility
conditions (e.g. in the rain, dark or with a low sun), these coatings may
cause dazzle: risk of accident! Such coatings can also cause the wind-
screen wiper blades to make noise.
CAUTION
● Remove snow and ice from windows and exterior mirrors with a plastic
scraper only. To avoid scratches caused by dirt on the glass, the scraper
should only be pushed in one direction and not moved to and fro.
● The heating element for the rear window is located on the inner side of
the window. To avoid damaging them, do not apply stickers to the heating
elements.
● Never use warm or hot water to remove snow and ice from windows and
mirrors. This could cause the glass to crack! 
Rims
The wheels require regular attention to preserve their appearance. It is im-
portant to remove road salt and brake dust by washing the wheels at regu-
lar intervals, otherwise the finish will be impaired.
After washing, the wheels should only be cleaned with an "acid-free" clean-
ing agent for alloy wheels. This is available from SEAT Official Services and
specialist retailers. Never leave the cleaning agent on the rims for any lon-
ger than specified in the instructions before rinsing it off. If the wheel clean-
er fluid contains acid it can attack the surfaces of the wheel bolts. 
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242Care and cleaning
Car polish or other abrasive agents should not be used for maintaining the
rims. If the protective coating is damaged, e.g. by stone impact, the dam-
aged area should be touched up immediately.
WARNING
Please note when cleaning the wheels that water, ice and road salt can
impair the effectiveness of the brakes; this can cause an accident.

Exhaust tail pipe
It is important to remove road salt and brake dust by washing the wheels at
regular intervals, otherwise the exhaust tail pipe material could be dam-
aged. To remove impurities, do not use rim, paint or chrome cleaners or oth-
er abrasive products. Clean the exhaust tail pipes with cleaning products
that are suitable for stainless steel.
SEAT Official Services carry stocks of cleaning products that have been tes-
ted and approved for use on your vehicle. 
Care of the vehicle interior Radio display/Easy Connect* and control panel*
The display can be cleaned with a soft cloth and a professionally available
“LCD cleaner”. Moisten the cloth with a small amount of the cleaning fluid.
The Easy Connect control panel* should first be cleaned with a brush so
that no dirt goes into the device or between the keys and housing. Next, we
recommend cleaning the Easy Connect control panel* using a cloth damp-
ened with water and washing-up liquid.
CAUTION
● To avoid scratching the screen, do not wipe the display with a dry cloth.
● To avoid damage, ensure that no liquid goes into the Easy Connect con-
trol panel*. 
Plastic and leatherette parts
Plastic parts and leatherette can be cleaned with a damp cloth. If this is not
sufficient, plastic parts and leatherette should only be treated with a special
solvent-free plastic cleaner . 
Textile covers and trim parts
Textile covers and trim parts (e.g. seats, door trim) should be cleaned regu-
larly with a vacuum cleaner. This will remove surface dirt which could other-
wise be rubbed into the textile material during use. Do not use steam clean-
ers, as the steam could carry the dirt deeper into the textile material.
Normal cleaning
We recommend that you use a soft sponge or a commercially available lint-
free, micro-fibre cloth for normal cleaning. Only use brushes on floor cover-
ings and mats, as other textile surfaces could become damaged.
In the case of normal surface dirt you can use a foam cleaner. Use a sponge
to spread the foam on the textile surface and to work it into the material
lightly. However, make sure that the textile material does not become soak-
ing wet. Then dab off the foam with a dry and absorbent cloth (e.g. a micro-
fibre cloth) and vacuum off any residue once the surface is completely dry.
Cleaning stains
Treat drink stains (such as coffee or fruit juice, etc.) with a cleaning solution
for delicate fabrics. The cleaning product solution should be applied with a 

251
Checking and refilling levels
WARNING
Natural gas is a highly explosive, easily flammable substance. Incorrect
handling of the natural gas can cause accidents serious burns and other
injuries.
● Before refuelling with natural gas, engage the filler neck correctly. If
you smell gas, stop refuelling immediately.
WARNING
The vehicle is not prepared to use liquefied natural gas (LNG) and this
fuel must not be added under any circumstances. Liquefied natural gas
can cause the natural gas tank to explode resulting in serious injury.
Note
● The filling nozzles of all natural gas pumps might not be operated in the
same way. If you do not know, ask a qualified employee at the petrol station
to do the refuelling.
● Noises heard when refuelling are normal and do not indicate the pres-
ence of damage to the system.
● The vehicle natural gas system is prepared both for refuelling with a
small compressor (slow refuel) and a large compressor (fast refuel) in natu-
ral gas service stations. Bonnet
Working on components in the engine compartment
Extra caution is necessary when working on components in
the engine compartment. Always be aware of the danger of injury and scalding as well as the risk of
accident or even fire when working in the engine compartment (e.g. when
checking and refilling fluids). Always observe the warnings listed below
and follow all general safety precautions. The engine compartment of the
vehicle is a potentially hazardous area ⇒ 
.
WARNING
● Switch the ignition off.
● Remove the ignition key.
● Apply the handbrake.
● If the vehicle has a manual gearbox, place the lever in neutral; if it
has an automatic gearbox, place the selector lever in position P.
● Wait for the engine to cool down.
● Keep children away from the engine compartment.
● Never spill liquids used for vehicle operation on the engine compart-
ment, as these may catch fire (e.g. the antifreeze in coolant).
● Take care not to cause short circuits in the electrical system, especial-
ly when working on the battery.
● If working inside the engine compartment, remember that, even when
the ignition is switched off, the radiator fan may start up automatically,
and therefore there is a risk of injury.
● Do not unscrew the cap on the coolant expansion tank when the en-
gine is hot. The cooling system is under pressure. 
Safety FirstOperating instructionsPractical TipsTechnical specifications