2012 Seat Leon 5D cooling

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. 

227
Wheels and tyres
If you use tyres that are approved by SEAT you can be sure that the actual
tyre dimensions will be correct for your vehicle. If you decide to fit a differ-
ent type of tyre, you must obtain the appropriate manufacturer's certificate
from the tyre retailer to confirm that the tyres are suitable for your vehicle.
Keep this certificate in a safe place.
Your SEAT Official Service will be able to advise you on which tyres may be
fitted to your vehicle.
It is best to have all servicing of wheels and tyres performed by a special-
ised workshop. They are familiar with the procedure and have the necessary
special tools and spare parts as well as the proper facilities for disposing of
the old tyres.
WARNING
● It is very important to ensure that the tyres you have chosen have ad-
equate clearance. When selecting replacement tyres, do not rely entirely
on the nominal tyre size marked on the tyre; with some makes of tyre the
effective tyre size can differ significantly from the nominal dimensions,
even though the tyres have the same size designation. Inadequate tyre
clearance can result in damage to the tyres or the vehicle, causing a seri-
ous safety risk. It may also invalidate the vehicle's registration for use on
public roads.
● Avoid running the vehicle on tyres that are more than 6 years old. If
you have no alternative, you should drive slowly and with extra care at all
times.
● If wheel trims are fitted after the car is purchased, ensure that there
is an adequate flow of air for cooling the brake system.
For the sake of the environment
Old tyres must be disposed of according to the laws in the country con-
cerned.
Note
● Never mount used tyres if you are not sure of their “previous history”.
● For technical reasons, it is not generally possible to use the wheels from
other vehicles. In some cases, this may also be true for the same model of
wheel. 
Wheel bolts
The wheel bolts are designed to suit the rims on your car.
The wheel bolts are matched to the rims. When installing different wheels
(for instance alloy wheels or wheels with winter tyres) it is important to use
the correct wheel bolts with the right length and correctly shaped bolt
heads. This ensures that wheels are fitted securely and that the brake sys-
tem functions correctly.
The wheel bolts must be clean and turn easily.
A special adapter is required to turn the anti-theft wheel bolts*
⇒ page 237. 
Winter tyres
Winter tyres will improve the vehicles handling on snow and
ice.
– Winter tyres must be fitted on all four wheels.
– Only use winter tyres that are approved for your vehicle.
– Please note that the maximum permissible speed for winter
tyres may be lower than for summer tyres. 
Safety FirstOperating instructionsPractical TipsTechnical specifications

Controls and displays (overview) . . . . . . . . . . . 59
Control Units . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Convenience closingPanoramic sliding sunroof . . . . . . . . . . . . . 104
Convenience opening Panoramic sliding sunroof . . . . . . . . . . . . . 104
Convenience opening/closing . . . . . . . . . . . . 101
Cooling system Checking the coolant . . . . . . . . . . . . . . . . . 216
Coolant temperature gauge . . . . . . . . . . . . . 67
Topping up coolant . . . . . . . . . . . . . . . . . . 216
Cornering lights . . . . . . . . . . . . . . . . . . . . . . . . 109
Correct adjustment of front seat head re- straints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Correct adjustment of rear seat head restraints In-use and non-use positions . . . . . . . . . . . 15
Correct sitting position front passenger . . . . . . . . . . . . . . . . . . . . . . 12
Incorrect sitting position . . . . . . . . . . . . . . . 15
passenger . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Cruise control . . . . . . . . . . . . . . . . . . . . . . . . . . 164 Control lamp . . . . . . . . . . . . . . . . . . . . . . . . 164
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 164
Cruise control system . . . . . . . . . . . . . . . . . . . . 164
Curtain airbags . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 43 D
Danger of fitting a child seat on the front pas- senger seat . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Data recorder . . . . . . . . . . . . . . . . . . . . . . . . . . 189
Daytime driving light . . . . . . . . . . . . . . . . . . . . 109
DEF (instrument panel) . . . . . . . . . . . . . . . . . . . 67
Depth of tread . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Diagnostic connection . . . . . . . . . . . . . . . . . . . 189
Diesel Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Particulate filter Diesel . . . . . . . . . . . . . . . . 190
Preheating . . . . . . . . . . . . . . . . . . . . . . . . . 144
Digital clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Dipped beam headlight . . . . . . . . . . . . . . . . . . 108
Direction of rotation (tyres) . . . . . . . . . . . . . . . 239
Disabling the airbag . . . . . . . . . . . . . . . . . . . . . . 44
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61, 62
Display/Easy Connect control panel: Cleaning . .202
Disposal Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Seat belt tensioners . . . . . . . . . . . . . . . . . . . 29
Door/rear lid warning . . . . . . . . . . . . . . . . . . . . . 73
Downhill speed control . . . . . . . . . . . . . . . . . . 158
Drink holders . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Driver see Correct sitting position . . . . . . . 11, 12, 13
Driver information system CD/radio display . . . . . . . . . . . . . . . . . . . . . 73
Door/rear lid warning . . . . . . . . . . . . . . . . . . 73
Engine oil temperature display . . . . . . . . . . 77 Operation via the windscreen wiper lever . 73
Outside temperature display . . . . . . . . . . . . 73
Driving With a trailer . . . . . . . . . . . . . . . . . . . . 194, 195
Driving abroad Headlights . . . . . . . . . . . . . . . . . . . . . . . . . 112
Driving safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Driving through water . . . . . . . . . . . . . . . . . . . 190
Dynamic headlight range control . . . . . . . . . . 114
E
E10 see Ethanol (fuel) . . . . . . . . . . . . . . . . . . . . 206
Easy Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Economic driving . . . . . . . . . . . . . . . . . . . . . . . 191
Efficiency programme Additional electrical appliances . . . . . . . . . 78
Saving tips . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Electrical accessories see Power socket . . . . . . . . . . . . . . . . . . . . 129
Electric windows . . . . . . . . . . . . . . . . . . . . . . . . 100 Convenience opening/closing . . . . . . . . . 101
Electro-mechanical steering . . . . . . . . . . . . . . 186 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 186
Electronic differential lock . . . . . . . . . . . . . . . . 183
Electronic Self-locking . . . . . . . . . . . . . . . . . . . 183
Electronic Stability Control (ESC) . . . . . . . . . . 183
Emergencies . . . . . . . . . . . . . . . . . . . . . . . . . . . 232 Automatic gearbox Backup programme . . 162
Replacing the battery . . . . . . . . . . . . . . . . . 219
Emergency braking warning . . . . . . . . . . . . . . 111
279
Index