2012 Seat Leon 5D stop start

213
Checking and refilling levels
– Briefly run the engine at idle speed until the operating tempera-
ture is reached and then stop.
– Wait two minutes.
– Pull out the dipstick. Wipe the dipstick with a clean cloth and
insert it again, pushing it in as far as it will go.
– Then pull it out once more and check the oil level ⇒ Fig. 108.
Top up with engine oil if necessary.
Oil level in area A
Do not add oil
⇒ .
Oil level in area B
You can add oil, but keep the level in this zone.
Oil level in area C
Oil
must be added. Afterwards, the oil level should be in the lined area
B.
Depending on how you drive and the conditions in which the vehicle is
used, oil consumption can be up to 0.5 l/1000 km. Oil consumption is likely
to be higher for the first 5000 km. For this reason the engine oil level must
be checked at regular intervals, preferably when filling the tank and before
a journey.
WARNING
Any work carried out in the engine compartment or on the engine must
be carried out cautiously.
● When working in the engine compartment, always observe the safety
warnings ⇒ page 209.
–
–
–
CAUTION
If the oil level is above the area A do not start the engine. This could result
in damage to the engine and catalytic converter. Contact a Technical Serv-
ice. 
Topping up engine oil 
Top up gradually with small quantities of engine oil.
Fig. 109 In the engine
compartment: Engine oil
filler cap
Before opening the bonnet, read and observe the warnings ⇒ 
in
Working on components in the engine compartment on page 209.
– Unscrew cap from engine oil filler opening ⇒ 
Fig. 109.
– Top-up oil in small amounts, using the correct oil.
– To avoid over-filling with engine oil, you should top-up using
small quantities, wait a while and check the oil level before
adding any more oil. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

216Checking and refilling levels
Topping up coolant
Top up coolant when the level is below the MIN (minimum)
mark.
Fig. 110 Engine com-
partment: Coolant expan-
sion tank cap
Checking coolant level
– Park the vehicle in a horizontal position.
– Switch the ignition off
– Read off the coolant level on coolant expansion tank. When the
engine is cold, the coolant level should be between the marks.
When the engine is hot, it may be slightly above the upper
mark.
Topping up coolant
– Wait for the engine to cool down.
– Cover the coolant expansion tank cap with a cloth and carefully
unscrew it to the left ⇒ 
. –
Top up the coolant only if there is still coolant in the expansion
tank, otherwise you could damage the engine. If there is no
coolant in the expansion tank, do not continue driving. You
should obtain professional assistance ⇒ 
.
– If there is still some coolant in the expansion tank, top up to the
upper mark.
– Top up with coolant to the upper mark until the level becomes
stable.
– Screw the cap back on correctly.
Any loss of coolant fluid normally indicates a leak in the cooling system.
Take the vehicle straight to a specialised workshop to have the cooling sys-
tem examined. If there are no leaks in the engine cooling system, a loss of
coolant can only occur if the coolant boils and is forced out of the system as
a result of overheating.
WARNING
● The cooling system is under pressure. Do not unscrew the cap on the
coolant expansion tank when the engine is hot: risk of burns!
● The antifreeze and coolant fluid can be a health hazard. Therefore,
the antifreeze should be stored in the original container in a safe place
out of reach of children. Failure to comply could result in poisoning.
● 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.
CAUTION
Do not top up the expansion tank with coolant fluid if it is empty! Air could
enter the cooling system. In this case, stop driving. Seek specialist assis-
tance. Otherwise, there is a risk of engine damage. 

219
Checking and refilling levels
Charging the battery
Terminals for charging the battery are fitted in the engine
compartment.
– Note the warnings ⇒ 
in Important safety warnings for han-
dling a vehicle battery on page 218 and ⇒ .
– Switch off all electrical equipment. Remove the ignition key.
– Raise the bonnet ⇒ page 210.
– Open the battery cover.
– Connect the charger clamps as described to the positive pole of
the battery (+) and, exclusively to an earth on the bodywork
(–).
– Only use a charger which is compatible for use with 12 V nomi-
nal voltage batteries. The charge must not exceed a voltage of
15 V.
– Now connect the battery charger to the power socket and switch
on.
– After charging the battery: switch off the battery charger and
disconnect the power socket cable.
– Finally disconnect the charger cables from the battery.
– Replace the battery cover correctly.
– Close the bonnet ⇒ page 210.
Important: Before you charge the battery make sure you read the manufac-
turer's instructions for using the battery charger.
WARNING
Never charge a battery that has frozen: replace battery! Failure to do so
may lead to an explosion.
Note
Use only the terminals in the engine compartment to charge the battery. 
Replacing the battery
The new battery should have the same specifications (am-
perage, load and voltage) as the used battery.
Your vehicle is equipped with an intelligent power management system to
control the distribution of electrical energy ⇒ page 187. The power manage-
ment function ensures that the battery is charged much more efficiently
than on vehicles without a power management system. To maintain this
function after replacing the battery, we recommend that the replacement
battery used is of the same make and type as the original fitted battery. To
make proper use of the power management function after the battery has
been changed, have the battery coded to the power management mode at a
specialised workshop.
CAUTION
● Some vehicles, for example those with the Start-Stop system* are fitted
with a special battery (AGM-type or EFB-type battery). If any other type of
battery is fitted, the Start-Stop function may be considerably reduced and
the vehicle may not stop on repeated occasions.
● Make sure that the vent hose is always attached to the original opening
on the side of the battery. Gases or battery acid can otherwise escape and
possibly cause damage.
● The battery holder and clamps must always be correctly secured. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

241
Emergencies
– Take out the temporary spare wheel.
Chains
For technical reasons, snow chains must not be used on the temporary
spare wheel.
If you have a puncture on one of the front wheels when using snow chains,
fit the temporary spare wheel in place of one of the rear wheels. Fit the snow
chains on the rear wheel that you have removed and replace the punctured
front wheel with this wheel.
WARNING
● After fitting the temporary spare wheel, check the tyre pressures as
soon as possible. Failure to do so may cause an accident. The tyre pres-
sures are listed on the inside of the fuel tank flap.
● Do not drive at over 80 km/h (50 mph) when the temporary spare
wheel is fitted on the vehicle: risk of accident!
● Avoid heavy acceleration, hard braking and fast cornering: risk of ac-
cident!
● Never use more than one temporary spare wheel at the same time,
risk of accident.
● No other type of tyre (normal summer or winter tyre) may be fitted on
the compact temporary spare wheel rim.
 Jump starting
Jump leads
The jump lead must have a sufficient wire cross section.
If the engine fails to start because of a discharged battery, the battery can
be connected to the battery of another vehicle to start the engine.
Jump leads
Jump leads must comply with standard DIN 72553 (see cable manufactur-
er's instructions). The wire cross section must be at least 25 mm 2
for petrol
engines and at least 35 mm 2
for diesel engines.
Note
● The vehicles must not touch each other, otherwise electricity could flow
as soon as the positive terminals are connected.
● The discharged battery must be properly connected to the on-board net-
work. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

242Emergencies
How to jump start: description
Fig. 126 Diagram of con-
nections for vehicles
without Start Stop sys-
tem
Fig. 127 Diagram of con-
nections for vehicles
with Start Stop system
Jump lead terminal connections
1. Switch off the ignition of both vehicles ⇒ 
.
2. For vehicles without Start-Stop system :–
Connect one end of the red jump lead to the positive +
termi-
nal of the vehicle with the flat battery A ⇒ Fig. 126.
– Connect the other end of the red jump lead to the positive ter-
minal +
in the vehicle providing assistance B.
– Connect one end of the black jump lead to the negative terminal
–
of the vehicle providing assistance B ⇒ Fig. 126.
– Connect the other end of the black jump lead X
to a solid met-
al component bolted to the engine block or to the engine block
itself of the vehicle with the flat battery. However, connect it to
a point as far as possible from the battery A
.
3. For vehicles with Start-Stop system :
– Connect one end of the red jump lead to the positive +
termi-
nal of the vehicle with the flat battery A ⇒ Fig. 127.
– Connect the other end of the red jump lead to the positive ter-
minal +
in the vehicle providing assistance B.
– Connect one end of the black jump lead X
to a suitable ground
terminal, a solid piece of metal in the engine block, or to the en-
gine block ⇒ Fig. 127.
– Connect the other end of the black jump lead X
to a solid met-
al component bolted to the engine block or to the engine block
itself of the vehicle with the flat battery. However, connect it to
a point as far as possible from the battery A
.
4. Position the leads in such a way that they cannot come into contact with any moving parts in the engine compartment. 

243
Emergencies
Starting
5. Start the engine of the vehicle with the boosting battery and let it run at idling speed.
6. Start the engine of the vehicle with the flat battery and wait two or three minutes until the engine is “running”.
Removing the jump leads
7. Before you remove the jump leads, switch off the dipped beam headlights (if they are switched on).
8. Turn on the heater blower and heated rear window in the vehi- cle with the flat battery. This helps minimise voltage peaks
which are generated when the leads are disconnected.
9. When the engine is running, disconnect the leads in reverse or- der to the details given above.
Connect the battery clamps so they have good metal-to-metal contact with
the battery terminals.
If the engine fails to start, switch off the starter after about 10 seconds and
try again after about half a minute.
WARNING
● Please note the safety warnings referring to working in the engine
compartment ⇒ page 209.
● The battery providing assistance must have the same voltage as the
flat battery (12V) and approximately the same capacity (see imprint on
battery). Failure to comply could result in an explosion.
WARNING (Continued)
● Never use jump leads when one of the batteries is frozen. Danger of
explosion! Even after the battery has thawed, battery acid could leak and
cause chemical burns. If a battery freezes, it should be replaced.
● Keep sparks, flames and lighted cigarettes away from batteries, dan-
ger of explosion. Failure to comply could result in an explosion.
● Observe the instructions provided by the manufacturer of the jump
leads.
● Do not connect the negative cable from the other vehicle directly to
the negative terminal of the flat battery. The gas emitted from the battery
could be ignited by sparks. Danger of explosion.
● Do not attach the negative cable from the other vehicle to parts of the
fuel system or to the brake line.
● The non-insulated parts of the battery clamps must not be allowed to
touch. The jump lead attached to the positive battery terminal must not
touch metal parts of the vehicle, this can cause a short circuit.
● Position the leads in such a way that they cannot come into contact
with any moving parts in the engine compartment.
● Do not lean on the batteries. This could result in chemical burns.
Note
The vehicles must not touch each other, otherwise electricity could flow as
soon as the positive terminals are connected. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

247
Emergencies
Tow-starting
As a general rule, tow-starting is not recommended.
– Engage 2nd or 3rd gear before moving off.
– Press the clutch and hold the pedal down.
– Switch the ignition on.
– Once both vehicles are moving, release the clutch.
– As soon as the engine starts: press the clutch and put the gear
lever in neutral.
If the engine will not start, it is best to try starting it using the battery of an-
other vehicle ⇒ page 241 before attempting to tow start. You should only try
to tow-start the engine if jump starting is not successful. Tow-starting is an
attempt to start the engine via the movement of the wheels.
When tow-starting a vehicle with a petrol engine, do not tow it more than a
short distance, otherwise sunburnt fuel can enter the catalytic converter and
cause damage.
WARNING
The risk of accidents is high when tow-starting, as the towed vehicle can
easily be driven into the towing vehicle.
CAUTION
Do not tow vehicles for more than 50 m. Risk of damage to the catalytic con-
verter. Towing vehicles with a manual gearbox
Towing is relatively straightforward.
Please observe the relevant instructions ⇒ page 244.
The vehicle can be towed using a tow bar or tow rope in the normal way,
with all four wheels on the road; it can also be towed with either the front or
rear wheels lifted off the road. The maximum towing speed is 50 km/h (30
mph). 
Towing a vehicle equipped with automatic gearbox
Certain restrictions must be observed when towing your ve-
hicle. Please observe the relevant instructions ⇒ page 244.
The vehicle can be towed with a tow bar or tow rope in the normal way, with
all four wheels on the ground. When doing so, please note the following
points:
● Make sure the selector lever is in the N position.
● The vehicle must not be towed faster than 50 km/h (30 mph).
● The vehicle must not be towed further than 50 km (30 miles). Reason:
when the engine is not running, the gearbox oil pump does not work and
the gearbox is not adequately lubricated for higher speeds or longer distan-
ces.
If the vehicle has to be towed with a breakdown truck, it must only be sus-
pended at the front wheels. Reason: the drive shafts are located on the front
wheels. If the car is towed with the rear wheels lifted off the road (I.e. travel-
ling backwards), the drive shafts also turn backwards. The planetary gears
in the automatic gearbox then turn at such high speeds that the gearbox
will be severely damaged in a short time. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

251
Fuses and bulbs
No.Electrical consumerAmpsF29Vacant-F30Vacant-F31Left lights40F32Parking aid control unit7,5F33Airbag5
F34Reverse switch, clima sensor, electrochromic
mirror7,5
F35Diagnosis, headlight control unit, headlight ad-
juster10
F36Front camera10F37Vacant-F38Vacant-F39Right door30F4012V socket20F41Steering column20F42Central locking40F43Interior light30F44Vacant-F45Vacant-F47Rear window wiper15F49Starter motor; clutch sensor5F51Vacant-F53Heated rear window30
The electric windows and electric seats* are protected by circuit breakers.
These switch on again automatically after a few seconds when the overload
(caused for example by frozen windows) has been corrected.
Note
Please note that the above list, while correct at the time of printing, is sub-
ject to alterations. 
Fuses on left side of engine compartment
No.Electrical consumerAmpsF1Vacant-F2ESC control unit40F3Engine control unit (diesel/petrol)15/30F4Engine sensors5/10F5Engine sensors7,5/10F6Brake light sensor5F7Engine power supply5/10F8Lambda probe10F9Engine5/10/20F10Fuel pump control unit15/20F11PTC40F12PTC40F13Automatic gearbox control unit15/30F15Horn15F16Fuel pump control unit20F17Engine control unit7,5F18Terminal 30 (positive reference)5F19Front windscreen washer30F20Alarm horn10F22Engine control unit5F23Starter motor30 
Safety FirstOperating instructionsPractical TipsTechnical specifications