2012 Seat Leon 5D ECU

Table of Contents
Manual structure . . . . . . . . . . . . . . . . . . . . 5
Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Safety First . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Safe driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Brief introduction . . . . . . . . . . . . . . . . . . . . . . . . . 7
Sitting position for vehicle occupants . . . . . . . . . 10
Pedal area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Storing objects . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Brief introduction . . . . . . . . . . . . . . . . . . . . . . . . . 19
Why wear seat belts? . . . . . . . . . . . . . . . . . . . . . . 21
Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Seat belt tensioners . . . . . . . . . . . . . . . . . . . . . . . 28
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Brief introduction . . . . . . . . . . . . . . . . . . . . . . . . . 30
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Knee airbag* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Side airbags* . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Curtain airbags* . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Deactivating airbags . . . . . . . . . . . . . . . . . . . . . . . 44
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Brief introduction . . . . . . . . . . . . . . . . . . . . . . . . . 47
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Securing child seats . . . . . . . . . . . . . . . . . . . . . . . 52 Operating instructions
. . . . . . . . . . . . . 59
Controls and displays . . . . . . . . . . . . . . . . . . . . . . 59
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Instruments and warning/control lamps . . . . 61
Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Control lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Driver information system . . . . . . . . . . . . . . . . . . 73
Information system . . . . . . . . . . . . . . . . . . . . . . . . 73
Introduction to the Easy Connect system* . . . 79
System settings (CAR)* . . . . . . . . . . . . . . . . . . . . . 79
Opening and closing . . . . . . . . . . . . . . . . . . . . . . 86
Central locking system . . . . . . . . . . . . . . . . . . . . . 86
Anti-theft alarm system . . . . . . . . . . . . . . . . . . . . 93
Emergency locking and unlocking . . . . . . . . . . . . 96
Rear lid (luggage compartment) . . . . . . . . . . . . . 98
Electric windows . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Panoramic sliding sunroof* . . . . . . . . . . . . . . . . . 103
Lights and visibility . . . . . . . . . . . . . . . . . . . . . . . . 106
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Sun blind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Windscreen wiper system . . . . . . . . . . . . . . . . . . . 116
Rear vision mirror . . . . . . . . . . . . . . . . . . . . . . . . . 122
Seats and storage . . . . . . . . . . . . . . . . . . . . . . . . . 125
General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Front seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Seat functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Head restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Luggage compartment . . . . . . . . . . . . . . . . . . . . . 131
Air conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Heating, ventilation, cooling . . . . . . . . . . . . . . . . 134 Driving
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Steering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Kick-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Hill hold assist* . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Speed warning function . . . . . . . . . . . . . . . . . . . . 149
Start-Stop system* . . . . . . . . . . . . . . . . . . . . . . . . 149
Manual gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Automatic gearbox/DSG automatic gearbox* . . . 154
Driver assistance systems . . . . . . . . . . . . . . . . . . 164
Cruise control system (CCS)* . . . . . . . . . . . . . . . . 164
Lane Assist system* . . . . . . . . . . . . . . . . . . . . . . . 168
SEAT Drive Modes* . . . . . . . . . . . . . . . . . . . . . . . . 171
Tiredness detection (break recommendation)* . 173
Tyre monitoring systems . . . . . . . . . . . . . . . . . . . . 175
Parking aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Practical Tips . . . . . . . . . . . . . . . . . . . . . . . . . 183
Intelligent technology . . . . . . . . . . . . . . . . . . . . . 183
Electronic Stability Control (ESC) . . . . . . . . . . . . . 183
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Electro-mechanical steering . . . . . . . . . . . . . . . . . 186
Power Management . . . . . . . . . . . . . . . . . . . . . . . 187
Information recorded in the control units . . . . . . 189
Driving and the environment . . . . . . . . . . . . . . . 190
Running in the engine . . . . . . . . . . . . . . . . . . . . . 190
Driving through flooded roads . . . . . . . . . . . . . . . 190
Installation of exhaust gas filtration systems . . . 190
Economic and ecological driving . . . . . . . . . . . . . 191
Environmental friendliness . . . . . . . . . . . . . . . . . 192
3
Table of Contents

8Safe driving
passengers are sitting in a correct position and use this equipment proper-
ly.
Therefore, information is provided about why this equipment is so impor-
tant, how it protects you, what you have to consider when using it and how
you and your passengers can achieve the greatest possible benefit from the
safety equipment fitted. This manual includes important warnings that you
and your passengers should note in order to reduce the risk of injury.
Safety is everyone's business! 
Before starting every trip
The driver is always responsible for the safety of the passen-
gers and the safe operation of the vehicle.
For your own safety and the safety of your passengers, always note
the following points before every trip:
– Make sure that the vehicle's lights and turn signals are working
properly.
– Check tyre pressure.
– Ensure that all windows provide a clear and good view of the
surroundings.
– Make sure all luggage is secured ⇒ page 17.
– Make sure that no objects can interfere with the pedals.
– Adjust front seat, head restraint and rear vision mirrors properly
according to your size. –
Ensure that the passengers in the rear seats always have the
head restraints in the in-use position ⇒ page 15
– Instruct passengers to adjust the head restraints according to
their height.
– Protect children with appropriate child seats and properly ap-
plied seat belts ⇒ page 47.
– Assume the correct sitting position. Instruct your passengers al-
so to assume a proper sitting position. ⇒ page 10.
– Fasten your seat belt securely. Instruct your passengers also to
fasten their seat belts properly. ⇒ page 19. 
What affects driving safety?
Driving safety is largely determined by your driving style
and the personal behaviour of all vehicle occupants.
As a driver, you are responsible for yourself and your passengers.
When your concentration or driving safety is affected by any cir-
cumstance, you endanger yourself as well as others on the road
⇒ 
, for this reason:
– Always pay attention to traffic and do not get distracted by pas-
sengers or telephone calls.
– Never drive when your driving ability is impaired (e.g. by medi-
cation, alcohol, drugs).
– Observe traffic laws and speed limits. 

11
Safe driving
Correct sitting position for driver
The correct sitting position for the driver is important for
safe and relaxed driving.
Fig. 1 The correct dis-
tance between driver and
steering wheel
Fig. 2 Correct head re-
straint position for driver For your own safety and to reduce the risk of injury in the event of
an accident, we recommend the following adjustments for the driv-
er:
–
Adjust the steering wheel so that there is a distance of at least
25 cm between the steering wheel and the centre of your chest
⇒ Fig. 1.
– Move the driver seat forwards or backwards so that you are able
to press the accelerator, brake and clutch pedals to the floor
with your knees still slightly angled ⇒ 
.
– Ensure that you can reach the highest point of the steering
wheel.
– Adjust the head restraint so that its upper edge is at the same
level as the top of your head, or as close as possible to the
same level as the top of your head ⇒ Fig. 2.
– Move the seat backrest to an upright position so that your back
rests completely against it.
– Fasten your seat belt securely ⇒ page 19.
– Keep both feet in the footwell so that you have the vehicle un-
der control at all times.
Adjustment of the driver seat ⇒ page 125. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

12Safe driving
WARNING
● An incorrect sitting position of the driver can lead to severe injuries.
● Adjust the driver seat so that there is at least 25 cm distance between
the centre of the chest and the centre of the steering wheel ⇒ Fig. 1. If
you are sitting closer than 25 cm, the airbag system cannot protect you
properly.
● If your physical constitution prevents you from maintaining the mini-
mum distance of 25 cm, contact a specialised workshop. The workshop
will help you decide if special specific modifications are necessary.
● When driving, always hold the steering wheel with both hands on the
outside of the ring at the 9 o'clock and 3 o'clock positions. This reduces
the risk of injury when the driver airbag is triggered.
● Never hold the steering wheel at the 12 o'clock position, or in any
other manner (e.g. in the centre of the steering wheel). In such cases, if
the airbag is triggered, you may sustain injuries to the arms, hands and
head.
● To reduce the risk of injury to the driver during sudden braking ma-
noeuvres or an accident, never drive with the backrest tilted far back! The
airbag system and seat belts can only provide optimal protection when
the backrest is in an upright position and the driver is wearing his or her
seat belt correctly. The further the seat backrests are tilted to the rear,
the greater the risk of injury due to incorrect positioning of the belt web
or to the incorrect sitting position!
● Adjust the head restraint properly to achieve optimal protection.
 Correct sitting position for front passenger
The front passenger must sit at least 25 cm away from the
dash panel so that the airbag can provide the greatest pos-
sible protection in the event that it is triggered.
For your own safety and to reduce the risk of injury in the event of
an accident, we recommend the following adjustments for the front
passenger:
– Move the front passenger seat back as far as possible ⇒ 
.
– Move the seat backrest to an upright position so that your back
rests completely against it.
– Adjust the head restraint so that its upper edge is at the same
level as the top of your head, or as close as possible to the
same level as the top of your head ⇒ page 14.
– Always keep both feet in the footwell in front of the front pas-
senger seat.
– Fasten your seat belt securely ⇒ page 19.
It is possible to deactivate the front passenger airbag in exceptional circum-
stances ⇒ page 26.
Adjusting the front passenger seat ⇒ page 125. 

13
Safe driving
WARNING
● An incorrect sitting position of the front passenger can lead to severe
injuries.
● Adjust the front passenger seat so that there is at least 25 cm be-
tween your chest and the dash panel. If you are sitting closer than 25 cm,
the airbag system cannot protect you properly.
● If your physical constitution prevents you from maintaining the mini-
mum distance of 25 cm, contact a specialised workshop. The workshop
will help you decide if special specific modifications are necessary.
● Always keep your feet in the footwell when the vehicle is moving;
never rest them on the dash panel, out the window or on the seat. An in-
correct sitting position exposes you to an increased risk of injury in case
of a sudden braking or an accident. If the airbag is triggered, you could
sustain severe injuries due to an incorrect sitting position.
● To reduce the risk of injury to the front passenger in events such as
sudden braking manoeuvres or an accident, never travel with the back-
rest tilted far back! The airbag system and seat belts can only provide op-
timal protection when the backrest is in an upright position and the front
passenger is wearing his or her seat belt properly. The further the seat
backrests are tilted to the rear, the greater the risk of injury due to incor-
rect positioning of the belt web or to the incorrect sitting position!
● Adjust the head restraint correctly in order to achieve maximum pro-
tection.
 Correct sitting position for passengers in the rear seats
Passengers in the rear seats must sit up straight, keep their
feet in the footwells, have the head restraints positioned for
use and wear their seat belts properly.
To reduce the risk of injury in the event of a sudden braking ma-
noeuvre or an accident, passengers on the rear seat bench must
consider the following:
–
Adjust the head restraint to the correct position. ⇒ page 15
– Always keep both feet in the footwell in front of the rear seat.
– Fasten your seat belt securely ⇒ page 19.
– Use an appropriate child restraint system when you take chil-
dren in the vehicle ⇒ page 47.
WARNING
● If the passengers in the rear seats are not sitting properly, they could
sustain severe injuries.
● Adjust the head restraint correctly in order to achieve maximum pro-
tection.
● Seat belts can only provide optimal protection when seat backrests
are in an upright position and the vehicle occupants are wearing their
seat belts correctly. If passengers In the rear seats are not sitting in an
upright position, the risk of injury due to incorrect positioning of the seat
belt increases.

Safety FirstOperating instructionsPractical TipsTechnical specifications

16Safe driving
● Never kneel on the seats.
● Never tilt your seat backrest far to the rear.
● Never lean against the dash panel.
● Never lie on the rear bench.
● Never sit on the front edge of a seat.
● Never sit sideways.
● Never lean out of a window.
● Never put your feet out of a window.
● Never put your feet on the dash panel.
● Never put your feet on the surface of a seat.
● Do not allow anyone to travel in the footwell.
● Never travel without wearing the seat belt.
● Do not allow anyone to travel in the luggage compartment.
WARNING
● Any incorrect sitting position increases the risk of severe injuries.
● Sitting in an incorrect position exposes the vehicle occupants to se-
vere injuries if airbags are triggered, by striking a vehicle occupant who
has assumed an incorrect sitting position.
● Before the vehicle moves, assume the proper sitting position and
maintain it throughout the trip. Before every trip, instruct your passen-
gers to sit properly and to stay in this position during the trip ⇒ page 10,
Sitting position for vehicle occupants.
 Pedal area
Pedals
The operation of all pedals must never be impaired by ob-
jects or floor mats.
– Ensure that you can always press the accelerator, brake and
clutch pedals unimpaired to the floor.
– Ensure that the pedals can return unimpaired to their initial po-
sitions.
Use only floor mats which leave the pedal area free and can be securely fas-
tened on the footwell.
If a brake circuit fails, the brake pedal must be pressed down thoroughly in
order to stop the vehicle.
Wearing suitable shoes
Always wear shoes which support your feet properly and give you a good
feeling for the pedals.
WARNING
● Restricting pedal operation can lead to critical situations while driv-
ing.
● Never place objects on the driver footwell. An object could move into
the pedal area and impair pedal operation. In the event of a sudden driv-
ing or braking manoeuvre, you will not be able to operate the brake,
clutch or accelerator pedal. Risk of accident!


17
Safe driving
Floor mats on the driver side
Only floor mats may be used which can be securely fastened
in the footwell and do not impair operation of the pedals.
– Ensure that the floor mats are securely fastened during the trip
and do not obstruct the pedals ⇒ 
.
Only use floor mats which leave the pedals clear and which are secured to
prevent them from slipping. You can obtain suitable floor mats from a speci-
alised dealership. Fasteners* for floor mats are fitted in the footwells.
WARNING
● If the pedals are obstructed, an accident may occur. Risk of serious
injuries.
● Ensure that the floor mats are always securely attached.
● Never lay or fit floor mats or other floor coverings over the original
floor mats. This would reduce the pedal area and could obstruct the ped-
als. Risk of accident.

Storing objects Loading the luggage compartment
All luggage and other loose objects must be safely secured
in the luggage compartment.
Unsecured objects which shift back and forth could impair the driv-
ing safety or driving characteristics of the vehicle by shifting the
centre of gravity. –
Distribute the load evenly in the luggage compartment.
– Place heavy objects as far forward as possible in the luggage
compartment.
– Place the heavy objects first.
– Secure heavy objects to the fitted fastening rings ⇒ page 18.
WARNING
● Loose luggage and other objects in the luggage compartment could
cause serious injuries.
● Always stow objects in the luggage compartment and secure them on
the fastening rings.
● Use suitable straps to secure heavy objects.
● During sudden manoeuvres or accidents, loose objects can be thrown
forward, injuring vehicle occupants or passers-by. This increased risk of
injury will be further increased if a loose object is struck by an inflating
airbag. If this happens, objects can be transformed into “missiles”. Risk
of fatal injury.
● Please note that the centre of gravity may shift when transporting
heavy objects; this may affect vehicle handling and lead to an accident.
Therefore, it is essential to adjust your speed and driving style accord-
ingly, to avoid accidents.
● Never exceed the allowed axle weights or allowed maximum weight.
If the allowed axle load or the allowed total weight is exceeded, the driv-
ing characteristics of the vehicle may change, leading to accidents, inju-
ries and damage to the vehicle.
● Never leave your vehicle unattended, especially when the rear lid is
open. Children could climb into the luggage compartment, closing the
door behind them; they will be trapped and run the risk of death. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

18Safe driving
WARNING (Continued)
● Never allow children to play in or around the vehicle. Close and lock
all the doors and rear lid when you leave the vehicle. Before you lock the
vehicle, make sure that there are no adults or children in the vehicle.
● Never transport passengers in the luggage compartment. All vehicle
occupants must have their seat belt fastened ⇒ page 19.
Note
● Air circulation in the vehicle helps reduce fogging of the windows. Used
air escapes through ventilation slits in the side trim of the luggage compart-
ment. Ensure that the ventilation slits are never covered.
● Straps for securing the load to the fastening rings are commercially
available. 
Fastening rings*
There can be four fastening rings in the luggage compart-
ment for fastening luggage and other objects.
– Always use suitable and undamaged straps to secure luggage
and other objects to the fastening rings ⇒ 
in Loading the lug-
gage compartment on page 17.
Bear in mind that in the case of a collision or accident, even small and light
objects that are not firmly fixed can be projected at the occupants causing
injury.
Example: An object weighing 4.5 kg is lying unsecured in the vehicle. Dur-
ing a frontal collision at a speed of 50 km/h (30 mph), this object generates
a force corresponding to 20 times its weight. That means that the effective
weight of the object increases to about 90 kg. You can imagine the severity
of the injuries which might be sustained if this object strikes an occupant as it flies through the interior of the vehicle. This increased risk of injury will be
further increased if a loose object is struck by an inflating airbag.
WARNING
● If pieces of luggage or other objects are secured to the fastening
rings with inappropriate or damaged retaining cords, injuries could be
sustained in the event of braking manoeuvres or accidents.
● To prevent pieces of luggage or other objects from flying forward, al-
ways use appropriate retaining cords which are secured to the fastening
rings.
● Never secure a child seat on the fastening rings.
