2012 Seat Leon 5D ESP

188Intelligent technology
Depending on the power level of the battery, the individual electrical com-
ponents are switched off one after the other to prevent the battery from los-
ing too much charge and to ensure that the engine can be started reliably.
Dynamic power management
While the vehicle is moving, this function distributes the available power to
the various electrical components and systems according to their require-
ments. The power management ensures that on-board systems do not con-
sume more electrical power than the alternator can supply, and thus main-
tains the maximum possible battery power level.
Note
● The power management system is not able to overcome the given physi-
cal limits. Please remember that the power and useful life of the battery are
limited.
● When there is a risk that the vehicle will not start, the alternator power
failure or low battery charge level warning lamp will be shown 
⇒ page 69. 
Note carefully
Starting ability has first priority. Short trips, city traffic and low temperatures all place a heavy load on the
battery. In these conditions a large amount of power is consumed, but only
a small amount is supplied. The situation is also critical if electrical equip-
ment is in use when the engine is not running. In this case power is con-
sumed when none is being generated.
In these situations you will be aware that the power management system is
intervening to control the distribution of electrical power. When the vehicle is parked for long periods
If you do not drive your vehicle for a period of several days or weeks, the
power management will gradually shut off the on-board systems one by
one, or reduce the amount of current they are using. This limits the amount
of power consumed and helps to ensure reliable starting even after a long
period. Some convenience functions, such as remote vehicle opening, may
not be available under certain circumstances. These functions will be re-
stored when you switch on the ignition and start the engine.
With the engine switched off
For example, if you listen to the sound system with the engine switched off
the battery will run down.
If the energy consumption means there is a risk that the engine will not
start, a text will appear in vehicles with a driver information system*.
This driver indicator tells you that you must start the engine so that the bat-
tery can recharge.
When the engine is running
Although the alternator generates electrical power, the battery can still be-
come discharged while the vehicle is being driven. This can occur when a
lot of power is being consumed but only a small amount supplied, especial-
ly if the battery is not fully charged initially.
To restore the necessary energy balance, the system will then temporarily
shut off the electrical components that are using a lot of power, or reduce
the current they are consuming. Heating systems in particular use a large
amount of electrical power. If you notice, for instance, that the seat heating*
or the heated rear window is not working, they may have been temporarily
switched off or regulated to a lower heat output. These systems will be
available again as soon as sufficient electrical power is available.
You may also notice that the engine runs at a slightly faster idling speed.
This is quite normal, and no cause for concern. The increased idling speed
allows the alternator to meet the greater power requirement and charge the
battery at the same time.


189
Intelligent technology
Information recorded in the control units
Your vehicle is fitted at the factory with a series of electronic control units
responsible for the engine and gearbox management. In addition, the con-
trol units supervise the correct performance of the exhaust gas system and
the airbag systems.
Therefore, while the vehicle is being driven, these electronic control units
are continuously analysing the vehicle data. In the event of faults or devia-
tions from the theoretical values, only this data is stored. Generally, the in-
strument panel warning lamps indicate whether there are any malfunctions.
This data can only be read and analysed using special equipment.
The storing of the data allows specialised workshops to detect and repair
faults. Stored data may include:
● Important data about the engine and gearbox
● Speed
● Direction of travel
● Braking force
● Seat belt check
The vehicle control units never record conversations held by passengers in
the vehicle.
If the control unit records an accident with airbag activation, the system
may automatically send a signal. This will depend on the network operator.
Normally, transmission is only possible in areas with sufficient coverage.
Event Data Recorder
The vehicle is not fitted with an event data recorder.
An event data recorder temporarily stores the vehicle information. There-
fore, in the event of accident, it is possible to obtain detailed information
about how the accident occurred. For example, in vehicles with airbag sys-
tems, data relating to speed of impact, seat belt status, seat positions and airbag activation times may be stored. The volume of data depends on the
manufacturer.
Event data recorders can only be mounted with authorisation from the vehi-
cle owner and, in some countries, they are governed by local legislation.
Reprogramming control units
On the whole, all the data required for the component management is stor-
ed in the control units. The programming of certain convenience functions,
such as the turn signal convenience mode, individual door opening and dis-
play indications can be modified using special equipment at the workshop.
If the convenience functions are reprogrammed, the Instruction Manual in-
formation and descriptions will not coincide with the modified functions.
Therefore, SEAT recommends that any changes are recorded in the “Other
workshop notes section” of the Service Plan.
You can find out about possible reprogramming at your SEAT Official Serv-
ice.
Event recorder
In the footwell on the driver side you will find the diagnostics connection
socket for reading the event recorder. The event recorder stores operating
data and data on the status of the electronic control units. The events re-
corder should only be read and deleted by a SEAT Official Service or special-
ised workshop.
WARNING
The diagnostics connection socket must not be used for private purpo-
ses. Improper use can cause malfunctions: risk of accident!

Safety FirstOperating instructionsPractical TipsTechnical specifications

192Driving and the environment
Reduce idling time
In vehicles with the Start-Stop system idling is automatically reduced. In ve-
hicles without the Start-Stop system it is worth switching off the engine, for
example, at level crossings and at traffic lights that remain red for long peri-
ods of time. When an engine has reached operating temperature, and de-
pending on the cylinder capacity, keeping it off after about 5 seconds al-
ready saves more than the amount of fuel necessary for restarting.
The engine takes a long time to warm up when it is idling. Mechanical wear
and pollutant emissions are also especially high during this initial warm-up
phase. It is therefore best to drive off immediately after starting the engine.
Avoid running the engine at high speed.
Regular maintenance
Regular servicing helps in saving fuel even before the engine is started. A
well-serviced engine gives you the benefit of improved fuel efficiency as
well as maximum reliability and an enhanced resale value. A badly serviced
engine can consume up to 10% more fuel than necessary.
Avoid short journeys
The engine and catalytic converter need to reach their optimal operating
temperature in order to minimise fuel consumption and emissions.
A cold engine consumes a disproportionate amount of fuel. The engine only
reaches its working temperature after about four kilometres (2.5 miles),
when fuel consumption will return to a normal level.
Check tyre pressure
Always make sure the tyres are inflated to the correct pressures
⇒ page 223 to save fuel. If the pressure is below half bar, fuel consumption
may increase by 5%. Due to the greater rolling resistance, under-inflation
also increases tyre wear and impairs handling.
Do not use winter tyres all year round as they increase fuel consumption by
up to 10%. Avoid carrying unnecessary loads
Given that every kilo of
extra weight will increase the fuel consumption, it is
advisable to always check the luggage compartment to make sure that no
unnecessary loads are being transported.
Since the luggage rack increases the aerodynamic drag of the vehicle, you
should remove it when not needed. This will save, at a speed of 100-120
km/h (60-75 mph), approximately 12% of fuel.
Save electrical energy
The engine drives the alternator, thereby generating electricity. This implies
that any increase in power consumption also increases fuel consumption!
For this reason, switch off any unneeded consumption of electricity. Electri-
cal equipment which uses a lot of electricity includes the blower (at a high
setting), the rear window heating and the seat heating*. 
Environmental friendliness
Environmental protection is a top priority in the design, choice of materials
and production of your new SEAT.
Design measures for economical recycling
● Joints and connections designed for easy dismantling
● Modular construction to facilitate dismantling
● Increased use of single-grade materials
● Plastic parts and elastomers are rated in accordance with ISO 1043, ISO
11469 and ISO 1629
Choice of materials
● Nearly all materials used can be recycled
● Use of suitable plastics within the same system/set
● Recycled materials used in manufacture 

194Trailer
Trailer
Trailer towing What do you need to bear in mind when towing a trailer?
Your vehicle may be used to tow a trailer when fitted with the correct equip-
ment.
If you wish to retrofit a towing bracket, consult ⇒ page 196.
Connectors
Your vehicle is fitted with a 12-pin connector for the electrical connection
between the trailer and the vehicle.
If the trailer has a 7-pin plug you will need to use an adapter cable. This is
available in any Technical Service.
Trailer weight/drawbar load
Never exceed the authorised trailer weight. If you do not load the trailer up
to the maximum permitted trailer weight, you can then climb correspond-
ingly steeper slopes.
The maximum trailer weights listed are only applicable for altitudes up to
1000 m above sea level. With increasing altitude the engine power and
therefore the vehicle climbing ability are impaired because of the reduced
air density. The maximum trailer weight has to be reduced accordingly. The
weight of the vehicle and trailer combination must be reduced by 10% for
every further 1000 m (or part thereof). The gross combination weight is the
actual weight of the laden vehicle plus the actual weight of the laden trailer.
When possible, operate the trailer with the maximum permitted drawbar
load on the ball joint of the towing bracket, but do not exceed the specified
limit. The figures for
trailer weights and drawbar loads that are given on the data
plate of the towing bracket are for certification purposes only. The correct
figures for your specific model, which may be lower than these figures for
the towing bracket, are given in the vehicle documentation or in ⇒ chap-
ter Technical Data.
Distributing the load
Distribute loads in the trailer so that heavy objects are as near to the axle as
possible. Loads carried in the trailer must be secured to prevent them mov-
ing.
Tyre pressure
Set tyre pressure to the maximum permissible pressure shown on the stick-
er on the inside of the fuel tank flap. Set the tyre pressure of the trailer tyres
in accordance with the trailer manufacturer's recommendations.
Exterior mirrors
Check whether you can see enough of the road behind the trailer with the
standard rear vision mirrors. If this is not the case, you should have addi-
tional exterior mirrors fitted. Both exterior mirrors should be mounted on
hinged extension brackets. Adjust the mirrors to give sufficient vision to the
rear.
WARNING
Never transport people in a trailer. This could result in fatal accidents. 

195
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. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

200Care and cleaning
Care and polishing
Care
Waxing protects the paintwork. It is time to apply a good coat of wax when
water no longer forms droplets and rolls off the clean paintwork.
Even if a wax solution is used regularly in the vehicle washing tunnel, it is
advisable to protect the paint with a hard wax coating at least twice a year.
In the summer, you will find it is much easier to remove dead insects (which
accumulate on the bumper and the front of the bonnet) if the car has been
treated with care products recently.
Polishing
Polishing is only necessary if the paint has lost its shine, and the gloss can-
not be brought back by putting on wax.
If the polish does not contain wax, a wax product should be applied after
polishing.
CAUTION
● Do not use polishes and hard wax on painted parts with a matt finish or
on plastic parts.
● Do not apply paint polishes to the side trim that runs around the panor-
amic roof and ends on the windscreen. However, it can be treated with hard
wax. 
Trims
In respect for the environment, the silver-plated trims on the body are made
of pure aluminium (they do not contain chrome).
Dirt or marks on the trim mouldings should be removed with a cleaning
product with a neutral PH (do not use a chrome cleaner). Body polish is also unsuitable for use on trim mouldings. The intensive cleaning fluids often
used before the car goes into a car wash may contain alkaline substances,
which can cause dull or milky patches when they dry out.
SEAT Official Services carry stocks of cleaning products which have been
tested for use on your vehicle and are not harmful to the environment.

Plastic parts
Plastic parts are cleaned with a power washer. If this is not sufficient, plas-
tic parts should only be treated with a special solvent-free plastic cleaning
agent. Do not use paintwork cleaners, polishes or wax on plastic parts. 
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 198. 
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 264.
If corrosion is already visible it must be thoroughly removed by a special-
ised workshop. 

203
Care and cleaning
Natural leather
SEAT does everything possible to preserve the genuine qual-
ities of this natural product. General information
Our range of leathers is large. The main type used is nappa in various forms,
that is, leather with a smooth surface in various different colours.
The amount of dye used determines the appearance and properties of leath-
er. If the leather is left in a more natural state, it retains its typical natural
napped appearance and confers excellent all-weather properties to the
seats. Fine veins, healed scars, insect bites, wrinkles and a subtle variation
in shading remain visible; these are the characteristic features of genuine
natural leather.
Natural napped leather does not have a protective surface coating of dye. It
is therefore somewhat more prone to damage. This should be borne in mind
if children or pets often travel in the car, or if there are other factors that
could lead to damage.
Types of leather with a coloured surface coating are likely to be more resist-
ant to damage. This has a great advantage for day-to-day use. However, this
means that the typical natural characteristics of the surface are less appa-
rent, though this does not affect quality.
Cleaning and care
Due to the natural properties of the specially selected hides employed, the
finished leather has a certain sensitivity to grease and dirt, etc. so a degree
of care is required in everyday use and when looking after the leather. Dark
clothing (especially if damp or incorrectly dyed) may stain leather uphols-
tery. Dust and grit in the pores and seams can scratch and damage the sur-
face. Therefore leather should be cleaned at regular intervals, depending on
the actual amount of use. When they have been in use for a certain time,
your car seats will acquire a typical and unmistakable patina. This is charac-
teristic for leather as a natural product and is a sign of genuine quality. To maintain the value of natural leather you should note the following
points:
CAUTION
● Avoid exposing leather to direct sunlight for long periods, otherwise it
may tend to lose some of its colour. If the car is left for a prolonged period
in the bright sun, it is best to cover the leather.
● Sharp-edged objects on clothing, such as belts, zip fasteners, rivets or
similar, can also leave permanent scratches and rough marks on the surface
of the leather.
Note
● Use a suitable impregnating cream with ultra-violet protection at regular
intervals and after cleaning. The cream nourishes and moisturises the leath-
er, keeps it supple and able to breathe. It will also form a protective film.
● Clean the leather every 2 to 3 months and remove fresh dirt as soon as
possible.
● Remove stains from fresh ball-pen and other inks, lipstick, shoe cream
and similar stains as soon as possible.
● Preserve the colour of the leather. A special coloured cream will renew
the colour of the leather when required and will eliminate differences in col-
our. 
Cleaning and care of leather upholstery
Natural leather requires an extra degree of attention and
care.
Normal cleaning
– Moisten a cotton or woollen cloth with water and wipe over the
leather surfaces. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

204Care and cleaning
More stubborn dirt
–More stubborn dirt can be removed using a mild soap solution
(pure liquid soap: two tablespoons dissolved in one litre of wa-
ter).
– Do not let the water soak through the leather or penetrate into
the seams.
– Then wipe off with a soft, dry cloth.
Removal of stains
– Remove fresh water-based stains such as coffee, tea, juices,
blood etc. with an absorbent cloth or kitchen roll, dried-on
stains with the cleaning agent from the care set.
– Remove fresh fat-based stains that have not penetrated the sur-
face such as butter, mayonnaise, chocolate, etc. with an ab-
sorbent cloth or kitchen roll or with the cleaning agent from the
care set.
– Treat fat-based, dried-in stains with grease-dissolving spray.
– Treat less common stains such as ball-pen and other inks, felt-
tip pens, nail polish, dispersion paint, shoe cream etc. with a
special leather stain remover.
Leather maintenance
– The leather should be treated regularly (about twice a year) with
a special leather-care product.
– Apply these products very sparingly.
– Then wipe off with a soft, dry cloth. Should you have questions regarding the care and cleaning of the leather
upholstery in your vehicle, we recommend that you contact your SEAT Offi-
cial Service. Our representatives will be happy to advise you and tell you
about the product range for leather conservation, for example:
●
Cleaning and care set
● Coloured leather-care cream
● Stain remover for ball-pen inks, shoe cream etc.
● Grease dissolving spray
● New products and further developments
CAUTION
On no account use solvents (such as petrol, turpentine), wax polish, shoe
cream or similar materials. 
Cleaning Alcantara upholstery
Removing dust and dirt
– Moisten a cloth just a little and wipe down the seat covers.
Removing stains
– Moisten a cloth with lukewarm water or diluted white spirits.
– Dab at the stain. Start at the outside and work inwards.
– Dry the area you have cleaned with a soft cloth.
Do not use leather cleaning products on Alcantara seat covers.
You may use a suitable shampoo on dust and dirt.
Dust and grit in the pores and seams can scratch and damage the surface. If
the car is left standing in the sun for long periods, Alcantara leather should 