engine Seat Leon 5D 2006 User Guide
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76First look at the coolant temperature gauge. If the needle is in the normal 
range, top up with coolant at the earliest opportunity ⇒ .
WARNING
•
If your vehicle is immobilised for any technical reasons, move it to a 
safe distance from traffic. Turn off the engine, turn on the hazard lights and 
place the warning triangle.
•
Never open the bonnet if you can see or hear steam or coolant escaping 
from the engine compartment. Risk of scalding. Wait until you can no 
longer see or hear escaping steam or coolant.
•
The engine compartment of any motor vehicle is a dangerous area! 
Before carrying out any work in the engine compartment, switch off the 
engine and allow it to cool down. Alwa ys note the corresponding warnings 
⇒ page 198.
Rear fog light 
This warning lamp lights up when the rear fog light is switched on 
. Further 
information  ⇒page 111.
Tu r n  si g nal s  
 
The warning lamp flashes when the turn signals are in oper-
ation.Depending on which turn signal is operated, either the left 
 or right 
 indi-
cator lamp flashes. Both  warning lamps will flash at the same time when the 
hazard warning lights are switched on.
If one turn signal fails, the warning lamp will start flashing twice as fast. Further information on the turn signals 
⇒page 115.
Trailer turn signals 
This warning lamp also flashes when the turn signals are 
operated while towing a caravan or trailer.The warning lamp 
 flashes when the turn signals are operated, provided a 
trailer is correctly attached and connected to the vehicle.
The warning lamp will not flash if one of the turn signals on the trailer fails.
Main beam headlights 
This warning lamp lights up when the main beams are on.The warning lamp 
 lights up when the main beams are on or when the 
headlight flasher is operated.
Further information  ⇒page 115.
Bulb defect 
The warning lamp lights up when a bulb in the vehicle's exte-
rior lighting is defective.The warning lamp 
 lights up when a bulb in the vehicle's exterior lighting 
(e.g. left-hand main  beam) is defective.
The following text is displayed in the instrument panel display
11):  MAIN 
BEAM LEFT DEFECT .
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Cruise control system* 
The warning lamp comes on when the cruise control system 
is switched on.The warning lamp 
 lights up when the cruise control system is switched on. 
Further notes on the cruise control system  ⇒page 165.
Washer fluid 
This warning lamp lights up to indicate that the windscreen 
washer level is too low.This serves as a reminder to fill up the reservoir at the earliest opportunity 
⇒page 208.
The information text displayed in  the instrument panel display is
12): REFILL 
WASHER FLUID
Brake system* / handbrake 
 
The warning lamp lights up if the handbrake is applied, if the 
brake fluid level falls too low or if there is a fault in the brake 
system.
This warning lamp 
 lights up if
•
If the handbrake is on If you drive faster than 6 km/h with the handbrake on, the following message 
will appear in the combi-instrument display
13): 
HANDBRAKE ON.  Also, an 
audible warning is given.
•
If the brake fluid level is too low  ⇒page 211.
The following text is displayed in the instrument panel display
13):  STOP 
BRAKE FLUID INSTRUCTIONS MANUAL .
•
If there is a fault in the brake system
The following text is displayed in the instrument panel display
13):  BRAKE 
FAULT INSTRUCTIONS MANUAL .
This warning lamp can light up together with the anti-lock brake system 
warning lamp.
WARNING
•
Before opening the bonnet, read and observe the warnings on 
⇒ page 198, “Working in the engine compartment”.
•
If the brake warning lamp does not  go out, or if it lights up when 
driving, the brake fluid level  ⇒page 211, “Brake fluid” in the reservoir is 
too low. Risk of accident. Stop the vehicle and do not drive on. Obtain tech-
nical assistance.
•
If the brake warning lamp 
 lights up together with the ABS warning 
lamp 
, the control function of the ABS could be out of action. This could 
cause the rear wheels to lock quickly when you brake. This could cause the 
rear to break away. Risk of skidding. Drive carefully to the nearest qualified 
workshop and have the fault corrected.
11)Depending on the model version12)Depending on the model version.
13)Depending on the model version.
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78Engine oil pressure 
This warning lamp indicates that the engine oil pressure is 
too low.If this warning symbol starts to flash, and is accompanied by three  audible 
warnings, switch off the engine and check the oil level. If the oil level is too 
low, add more engine oil  ⇒page 201.
The following text is displayed  in the instrument panel display
14): STOP 
ENGINE OIL PRESSURE INSTRUCTIONS MANUAL .
If the symbol flashes although the oil level is correct,  do not drive on. The 
engine must not even run at idle speed. Obtain technical assistance.
Anti-lock brake system (ABS) 
 
A warning lamp system monitors the ABS.
The warning lamp 
 should light up for a few seconds when the ignition is 
switched on. It goes out again after the system has run through an automatic 
test sequence.
There is a fault in the ABS if:
•
The warning lamp 
 does not light up when the ignition is switched on.
•
The warning lamp does not go  out again after a few seconds.
•
The warning lamp lights up when the vehicle is moving.
The vehicle can still be braked in the normal way (except that the ABS control 
function will not function). Please take  the vehicle to a qualified workshop as 
soon as possible. For further information on the ABS see the  ⇒page 169.
If a fault occurs in the ABS, the ESP* warning lamp will also light up. Brake system fault
If the ABS warning lamp 
 lights up together with the brake warning lamp 
, this indicates not only a fault in the ABS function, but also a possible fault 
in the brake system  ⇒.
WARNING
•
Before opening the bonnet, read and observe the warnings on 
⇒ page 198.
•
If the brake warning lamp 
 should light up together with the ABS 
warning lamp 
, stop the vehicle immediately and check the brake fluid 
level in the reservoir  ⇒page 211, “Brake fluid”. If the fluid level has 
dropped below the “MIN” mark you must not drive on. Risk of accident. 
Obtain technical assistance.
•
If the brake fluid level is correct, the fault in the brake system may have 
been caused by a failure of the ABS system. This could cause the rear 
wheels to lock quickly when you brake. This could cause the rear to break 
away. Risk of skidding. Drive carefully to the nearest qualified workshop 
and have the fault corrected.
Differential lock fault (EDL)*
EDL operates along with the ABS in vehicles equipped with an 
Electronic Stabilisation Program (ESP)*A malfunction in the EDL is indicated by the ABS warning lamp 
. Please 
take the vehicle to a qualified workshop as soon as possible. For further infor-
mation on the EDL  ⇒page 172.
14)Depending on the model version.
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Traction control system (TCS)*
The traction control system prevents the driven wheels from 
spinning when the vehicle is acceleratingThe warning lamp lights up  when the ignition is switched on and should turn 
off after about 2 seconds.
When the TCS is operating while driving, the warning lamp flashes. If the 
system is deactivated or if there is any fault in the same, the warning lamp will 
remain lit.
It will also come on if a fault should occur in the ABS because the TCS oper-
ates in conjunction with the ABS. For further information see  ⇒page 169.Soot accumulation in the dies el engine particulate filter* 
if the symbol 
 lights, soot has built up in the diesel engine particulate filter 
due to continuous short trips. In this case, drive the vehicle at a constant 
speed of at least 60 km/h (with an engine speed of about 1400 rpm) for 
about 10 minutes. The increase in temperature generated may burn the accu-
mulated soot in the filter.
If the symbol  is not deactivated, bring the vehicle to a specialized work-
shop to repair the fault.
For more information on the diesel particulate filter  ⇒page 175.
WARNING
•
The diesel engine particulate filter may reach extremely high tempera-
tures; it should not enter into contact with flammable materials under-
neath the vehicle. Failure to comply could result in fire.
Caution
Vehicles equipped with a diesel engine particulate filter must not be refuelled 
using biodiesel (RME), given that the fuel system may be damaged.Alternator 
 
This warning lamp signals a fault in the alternator.
The warning lamp 
 lights up when the ignition is switched on. It should go 
out when the engine has started running.
If the warning lamp  lights up while driving, th e alternator is no longer 
charging the battery. You should immediately drive to the nearest qualified 
workshop.
You should avoid using electrical equipment that is not absolutely necessary 
because this will drain the battery.
If the indicator flashes, the voltage is insufficient for normal vehicle 
operation.
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Engine management 
 
This warning lamp monitors th e engine management system 
for petrol engines.
The warning lamp 
 (Electronic Power Control) lights up when the ignition 
is switched on to show that the lamp  is working properly. It should go out 
when the engine has started running.
If a fault develops in the electronic engine management system while you are 
driving, this warning lamp will light  up. Take the vehicle to an Authorised 
Service Centre as soon as possible and have the engine checked.
Glow plug system / Engine fault 
 
The warning lamp lights up to show that the glow plugs are 
preheating. It flashes if there is an engine fault.
Warning lamp 
 is lit
The warning lamp  lights up while the glow plugs are preheating. When the 
warning lamp goes off, the engine should be started straight away.
Warning lamp 
 flashes
If a fault develops in the engine management system while you are driving, 
the glow plug lamp will flash 
. Take the vehicle to an Authorised Service 
Centre as soon as possible and have the engine checked.
Emission control system* 
 
This warning lamp monitors the exhaust system.
Warning lamp 
 flashes:
when there is misfiring that can damage the catalytic converter. Reduce 
speed and drive carefully to the nearest qualified workshop to have the 
engine checked.
The following text is displayed in the instrument panel display
15) : EXHAUST 
FUMES GO TO WORKSHOP!
Warning lamp 
 is lit:
if a fault has developed during driving which has reduced the quality of the 
exhaust gas (e. g. lambda probe fault). Reduce speed and drive carefully to 
the nearest qualified workshop to have the engine checked.
The following text is displayed in the instrument panel display:  EXHAUST 
FUMES GO TO WORKSHOP! .
Electronic stabilisation programme (ESP)* 
 
This warning lamp monitors the electronic stabilisation 
program.
This program includes the ABS, EDL and TCS.
The warning lamp 
 has the following functions:
•
It will light for about 2 seconds when the ignition is switched on while a 
test of the function is carried out.
•
It flashes when the ESP is activated when driving.
•
It will light up continuously if there is a malfunction in the ESP.
15)Depending on the model version.
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82•
It will light up continuously if the ESP is switched off.
•
It will also come on if a fault should occur in the ABS because the ESP 
operates in conjunction with the ABS.
If the ESP warning lamp 
 lights up and stays on after the engine is started, 
this may mean that the control system has temporarily switched off the ESP. 
In this case the ESP can be reactivated by switching the ignition off and then 
on again. If the warning lamp goes out, this means the system is fully 
functional.
Operating the foot brake 
The footbrake must be depressed when this warning lamp lights up. This is 
necessary when the automatic gearbox* selector lever is moved out of the 
positions P  or N.Power steering system* 
For vehicles with power steering, the level of steering assistance depends on 
the vehicle's speed and on the steering angle.
The warning lamp should light up for a few seconds when the ignition is 
switched on. It should go out when the engine has started running.
If the battery is disconnected, the indicator remains lit, even with the engine 
running. The warning light  only goes off after a distance of approx. 50 m.
There is a fault in the electromechanica l steering system if the lamp does not 
go out or light up, wh ils
 t the vehicle is in motion. The indicator may appear in 
two different colours to indicate faults. If it lights yellow, this indicates a 
minor fault. If it lights red, seek wo rkshop assistance immediately, if no 
assistance is available stop driving. Stop the vehicle and seek technical 
assistance. The power steering does not work if the battery is flat or if the  engine is off (for example, for towing). You should take into account that you 
will need considerably more power than normal to steer the vehicle if the 
steering assistance is reduced 
or has failed completely.
Brake pad wear indicator* 
As the brake pad wear indicator only monitors the front brake pads, it is advis-
able to have the rear brake pads inspected at the same time.
The information text displayed in the instrument panel display is
16): CHECK 
BRAKE PADS .
WARNING
Have the brake pads inspected immediately by a qualified dealership if the 
warning display 
 lights up.
Indicator for open doors or tailgate 
This indicator lights if one of th e doors or the tailgate is open.The warning light 
 should go off when all the doors are closed correctly.
The system also works when the ignition is switched off. It should go off 
about 15 seconds after the vehicle is locked.
16)Depending on the model version.
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Electronic immobiliser* “Safe”
This warning lamp flashes if an unauthorised key is used.Inside the key there is a chip that deac tivates the electronic immobiliser auto-
matically when the key is inserted into  the ignition. The immobiliser will be 
activated again automatically as soon as you pull the key out of the ignition 
lock.
The message displayed in the instrument panel display is
17): SAFE . The 
vehicle cannot be used in that case  ⇒page 153.
The engine can, however, be started if the appropriate coded SEAT genuine 
key is used.
Note
The vehicle cannot be operated properly if you do not have a genuine SEAT 
key.17)Depending on the model version.
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KeysKey set
The set of keys includes a remote control, a key without a 
remote control and a key tab with the number of the key.The key set belonging to your vehicle consists of the following items:•
one remote control key ⇒fig. 62   with folding key bit,
•
one key without remote control  ,
•
one key tab   with the key number.
Plastic key tab
Spare keys cannot be issued with out the key number on the key tab  ⇒fig. 62  
. Therefore:
•
Always keep the key tab in a safe place.
•
Never leave the key tab in the vehicle. If you sell the vehicle, please give the plastic key tab to the new owner.
Duplicate keys
If you need a replacement key, take y
our key tab to an Authorised Service 
Centre.
WARNING
•
Incorrect use of the keys can result in critical injuries.
•
Never leave children or disabled persons in the vehicle; in case of emer-
gency they may not be able to leave the vehicle or look after themselves.
•
Unsupervised use of a key could mean that the engine is started or that 
electrical equipment is used (e.g. elec tric windows). Risk of accident. The 
doors can be locked using the remote control key. This could result in 
people being trapped in the vehicle in an emergency.
•
Never leave any of the vehicle keys in the vehicle. Unauthorised use of 
your vehicle could result in injury, damage or theft. Always take the key 
with you when you leave the vehicle.
•
Never remove the key from the ignition  if the vehicle is in motion. Risk 
of accident. The steering lock could engage suddenly, and you would not be 
able to steer the vehicle.Caution
There are electronic compon ents in the key and remote control. Protect the 
keys from moisture and excessive vibration.
Fig. 62  Set of keys
AAAB
AC
AB
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Press the button     twice to unlock all doors.
WARNING
•
Incorrect use of the key can result in critical injuries.
•
Never leave children or disabled persons in the vehicle; in case of emer-
gency they may not be able to leave  the vehicle or look after themselves.
•
Never leave any of the vehicle keys in the vehicle. This could result in 
serious injuries, accidents or the theft of your vehicle. Always take the key 
with you when you leave the vehicle.
•
Unsupervised use of a key could me an that the engine is started or that 
electrical equipment is used (e.g. elec tric windows). Risk of accident. The 
vehicle can be locked using the remote control key. This could result in 
people being trapped in the vehicle in an emergency.Note
•
The radio-frequency remote control ca n also be programmed so that only 
the driver's door is unlocked the first time that the unlocking button on the 
radio frequency remote control key is pressed. When the button is pressed 
once more, all doors and the tailgate will be unlocked.
•
The remote control functions only when you are in range  ⇒page 100, 
fig. 64 (red area).
•
If the vehicle is unlocked using th e     button, the vehicle will be 
locked again automatically if any of the doors or the tailgate are not opened 
within 30 seconds of unlocking the vehicle. This function prevents the vehicle 
from remaining unlocked if the unlocking button is pressed by mistake.
•
If the vehicle cannot be opened and closed using the remote control, the 
remote control key will have  to be re-synchronised ⇒page 101.
Changing the batteryIf the battery indicator does not flash when the buttons are pushed, the 
battery must be replaced.
Caution
Use of inappropriate batteries may damage the radio frequency remote 
control. For this reason, always replac e the dead battery with another of the 
same size and power.
For the sake of the environment
The flat batteries must be disposed of in accordance with regulations 
governing the protection of the environment.Synchronising the remote control keySynchronising the remote control key
– Use both keys that have been delivered with the vehicle  ⇒page 99, fig. 62 , the key fitted with the remote control   and 
the normal key  .
– Unlock the vehicle from the driver side door using the key  without the remote.
– Turn the ignition ON using the key without the remote control.
– Lock the vehicle using the driver  side door lock with the remote 
control key  ⇒page 100, fig. 63 .
– In a time of maximum 30 seconds the following operations must 
be carried out:
A1
A1
AA
AB
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Unlocking and locking
106WindowsOpening or closing the windows electrically
The front and rear electric windows can be operated using the 
controls in the driver's door.Opening and closing the windows
– Press the button   to open a window.
– Pull button   to close a window  ⇒.Always close the windows fully if you park the vehicle or leave it unattended 
⇒.
You can use the electric windows for approx. 10 minutes after switching off 
the ignition if neither the driver door  nor the front passenger door has been 
opened and the key has not been  removed from the ignition. Buttons in the driver door
Button for window in front left door
Button for window in front right door
Buttons for rear windows* Safety switch for deactivating the electric window buttons in the rear 
doors
Button for window in rear left door
Button for window in rear right door
Safety switch 
*
Safety switch   in the driver door can be used to disable the electric window 
buttons in the rear doors.
Safety switch not pushed in: the buttons in the rear doors are enabled.
Safety switch pushed in: the buttons in the rear doors are disabled.
WARNING
•
Incorrect use of the electric  windows can result in injury.
•
Never close the tailgate without observing and ensuring it is clear, to do 
otherwise could cause serious injury to  you and others. Make sure that no 
one is in the path of a window.
•
Always take the vehicle key with you when you leave the vehicle.
•
Never leave children or disabled persons in the vehicle, particularly if 
they have access to the keys. Unsupervised use of a key could mean that 
the engine is started or that electric al equipment is used (e.g. electric 
windows). Risk of accident. The doors can be locked using the remote 
control key. This could result in people being trapped in the vehicle in an 
emergency.
•
The electric windows will work unti l the key has been removed from the 
ignition and one of the front doors has been opened.
Fig. 68  Section of the 
driver door: controls for 
the front and rear 
windows
A1A2A3A4A5
A3
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