2012 Seat Leon 5D lane assist

170Driver assistance systems
Control lamps
flashes or
lights upPossible causeSolution

(yellow)Lane Assist active but
not available.The system can not accurately recog-
nise the lane. Please see page 170,
The Lane Assist system is not availa-
ble (the control lamp is lit up yellow).

(green)Lane Assist system ac-
tive and available._
Several warning and control lamps light up for a few seconds when the igni-
tion is switched on while the function is verified. They will switch off after a
few seconds.
WARNING
If the warning lamps and messages are ignored, the vehicle may stall in
traffic, or may cause accidents and severe injuries.
● Never ignore the warning lamps or text messages.
● Stop the vehicle safely as soon as possible.
Note
Failure to heed the control lamps and text messages when they appear may
result in faults in the vehicle. Operating mode
Fig. 99 In the wind-
screen: Field of vision of
the Lane Assist system
camera
Using the camera located in the windscreen, the Lane Assist system detects
the possible lines dividing the lanes. When the vehicle involuntarily ap-
proaches a dividing line it has detected, the system notifies the driver with
a corrective steering movement . The corrective steering movement can be
overruled at any moment.
No warning is produced with the turn signals activated, given that the Lane
Assist system understands that a lane change is required.
Steering wheel vibration
The following situations cause vibration in the steering wheel and require
the driver to take active control of driving:
● When the limits of the very nature of the system are reached.
● When the maximum rotational torque during the corrective steering
movement is not enough to keep the vehicle inside the lane.
● When no lane is detected during the corrective steering movement. 

171
Driver assistance systems
Switching the Lane Assist system on or off
● The Assistants menu ⇒ page 77 drops down in the instrument panel by
pressing the Assistants button on the turn signal lever or by operating the
menu in the multifunction steering wheel.
● OR: by pressing the OK
button on the steering wheel the
⇒ page 77
function is activated/deactivated.
● The Lane centring guide is activated/deactivated in the Easy Connect
system using the CAR
button and the button on the Setup function
⇒ page 79.
Self-deactivation: The Lane Assist system can be automatically deactivated
if there is a system malfunction. The control lamp disappears.
Hands-Off Function
● If the driver does not exert any physical action on the steering wheel for
about 10 to 12 sec. the function deactivates.
● Visual and audible warnings on the instrument panel.
● The function switches off 2 seconds after the warning.
The Lane Assist system is active but it is not available (the control lamp is
lit up yellow)
● When driving at speeds below 65 km/h (38 mph).
● When the Lane Assist system does not detect the dividing lines of the
road. For example, in the event warnings indicating road works, and snow,
dirt, moisture or reflections.
● When the radius of a curve is too small.
● When no road markings can be seen.
● When the distance to the next marking to too great.
● When the system does not detect any clear and active steering move-
ment during a long period of time.
● Temporarily, in the event of very dynamic driving styles.
● If a turn signal is activated.
● With the stability control system ESC in Sport mode.
Note
● Before starting a journey, verify that the field of vision of the camera is
not covered ⇒ Fig. 99.
● Always keep the field of vision of the camera clean. 
Switching off the Lane Assist system in the following
situations
Due to the limits of the Lane Assist system, switch it off in the following sit-
uations:
● When more attention is required of the driver
● When driving in a sporty style
● In unfavourable weather conditions
● On roads in poor condition
● In areas of road works
Note
The Lane Assist system deactivates when driving below 60 km/h (40 mph). 
SEAT Drive Modes* Introduction
SEAT Drive Mode enables the driver to choose between four profiles or
modes, normal, sport, eco and individual , that modify the behaviour of vari-
ous vehicle functions, providing different driving experiences. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

199
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.
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.
CAUTION
● When you clean the vehicle with a pressure washer,
– stay a suitable distance from the sensors on the front and rear bump-
ers.
– Do not clean the camera lenses or surrounding area with the pressure
washer.
● Never use warm or hot water to remove snow and ice from the reverse
camera lens, as it could crack the lens.
● Never use abrasive cleaning agents on the lens. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

Gearshift paddles (automatic gearbox) . . . . . 159
General overview of the engine compartment 267
GlassCleaning/De-icing . . . . . . . . . . . . . . . . . . . 201
Glove compartment . . . . . . . . . . . . . . . . . . . . . 130 Multiple CD loader . . . . . . . . . . . . . . . . . . . 130
Glove compartment lighting . . . . . . . . . . . . . . 115
H Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 147
Hazard warning lights . . . . . . . . . . . . . . . . . . . 110
Headlight range control . . . . . . . . . . . . . . . . . . 114
Headlights Changing a bulb . . . . . . . . . . . . . . . . . . . . . 252
Dipped beam headlights . . . . . . . . . . . . . . 108
Driving abroad . . . . . . . . . . . . . . . . . . . . . . 112
Headlight control . . . . . . . . . . . . . . . . . . . . 108
Headlight washers . . . . . . . . . . . . . . . . . . . 119
Side light . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Heated rear window . . . . . . . . . . . . . . . . . 136, 138
Hill hold assist . . . . . . . . . . . . . . . . . . . . . . . . . 148 see also Hill hold assist . . . . . . . . . . . . . . . 148
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
How to jump start description . . . . . . . . . . . . . 242
I
Identification plate . . . . . . . . . . . . . . . . . . . . . . 264
Identifying letters of engine . . . . . . . . . . . . . . 264
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Increase capacity
of luggage compartment . . . . . . . . . . . . . . 132
Indicator Vehicle key . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Inertia mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Information on emissions . . . . . . . . . . . . . . . . 264
Inspection service . . . . . . . . . . . . . . . . . . . . . . 211
Installation of exhaust gas filtration systems Catalytic converter . . . . . . . . . . . . . . . . . . . 190
Particulate filter Diesel . . . . . . . . . . . . . . . . 190
Instrument cluster . . . . . . . . . . . . . . . . . . . . . . . 61
Instrument panel . . . . . . . . . . . . . . . . . . . . . . . . 61 Display . . . . . . . . . . . . . . . . . . . . . . . . . . 61, 62
Instruments . . . . . . . . . . . . . . . . . . . . . . . . . 61
Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Service interval display . . . . . . . . . . . . . . . . 65
Instrument panel lighting . . . . . . . . . . . . . . . . 114
Interior anti-dazzle rear vision mirrors . . . . . . 123
Interior monitoring . . . . . . . . . . . . . . . . . . . . . . . 95
Interior rear vision mirror see Rear vision mirrors . . . . . . . . . . . . . . . . 123
ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
J
Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232 Mounting points . . . . . . . . . . . . . . . . . . . . . 238
Jump leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Jump starting . . . . . . . . . . . . . . . . . . . . . . . . . . 241 K
Key Driver messages (mechanical contact) . . . 145
Unlocking/Locking . . . . . . . . . . . . . . . . . . . . 91
Keys Assigning a key . . . . . . . . . . . . . . . . . . . . . . 88
Changing the battery (vehicle key) . . . . . . . 90
Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Locking/Unlocking . . . . . . . . . . . . . . . . . . . . 97
Remote control . . . . . . . . . . . . . . . . . . . . . . . 88
Spare key . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Vehicle key . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Kick-down Manual gearbox . . . . . . . . . . . . . . . . . . . . . 146
Kick-down feature Automatic gearbox . . . . . . . . . . . . . . . . . . . 160
Knee airbag See "Airbag system" . . . . . . . . . . . . . . . . . . 38
L
Lamps Audible warnings . . . . . . . . . . . . . . . . . . . . . 69
Control lamps . . . . . . . . . . . . . . . . . . . . . . . . 69
Warning lamps . . . . . . . . . . . . . . . . . . . . . . . 69
Lane Assist . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 Cleaning the camera area . . . . . . . . . . . . . 199
Lane Assist system see Lane Assist . . . . . . . . . . . . . . . . . . . . . . 168
Launch Control Programme (automatic gear- box) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
281
Index