2011 Seat Leon 5D check engine

225
Checking and refilling levels
Opening the coolant expansion tank
– Switch off the engine and allow it to cool.
– To prevent scalding, cover the cap on the expansion tank with a
thick cloth and carefully unscrew the cap ⇒ 
.
Checking coolant level
– Look into the open coolant expansion tank and read off the
coolant level.
– If the level is below the “MIN” mark, top up with coolant.
Topping up coolant
– Only use new coolant liquid.
– Do not fill above the “MAX” mark.
Closing the coolant expansion tank
– Screw the cap on again tightly.
The position of the coolant expansion reservoir is shown in the correspond-
ing engine compartment illustration ⇒ page 273.
Make sure that the coolant meets the required specifications ⇒ page 224.
Do not use a different type of additive if additive G 12+ is not available. In
this case use only water and bring the coolant concentration back up to the
correct level as soon as possible by putting in the specified additive
⇒  page 224.
Always top up with new coolant.
Do not fill above the “MAX” mark. Otherwise the excess coolant will be
forced out of the cooling system when the engine is hot.
The additive G 12+ (purple) may be mixed with G 12 (red) and also with G
11.
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 217.
● When the engine is warm or hot, the cooling system is pressurised!
Do not unscrew the cap on the expansion tank when the engine is hot.
This is a burn injury risk.
CAUTION
● When mixed with other additives the colour of G 12 will change to
brown. If this occurs you should have the coolant changed immediately.
Failure to do so will result in engine damage!
● If a lot of coolant fluid has been lost, wait for the engine to cool down
before putting in cold coolant. This avoids damaging the engine. Large cool-
ant losses are an indication of leaks in the cooling system. See a special-
ised workshop immediately and have the cooling system checked. Other-
wise, there is a risk of engine damage. 
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

226Checking and refilling levels
Washer fluid and windscreen wiper blades
Topping up washer fluid 
The water for cleaning the windscreen should always be
mixed with washer fluid.
Fig. 147 In the engine
compartment: Cap of
windscreen washer fluid
reservoir.
The windscreen washer and the headlight washers are supplied with fluid
from the windscreen washer fluid container in the engine compartment.
The reservoir is located on the right-hand side of the engine compartment.
Plain water is not enough to clean the windscreen and headlights. We rec-
ommend that you always add a product to the windscreen washer fluid. Ap-
proved windscreen cleaning products exist on the market with high deter-
gent and anti-freeze properties, these may be added all-year-round. Please
follow the dilution instructions on the packaging.
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 217.
CAUTION
● Never put radiator anti-freeze or other additives into the windscreen
washer fluid.
● Always use approved windscreen cleansing products diluted as per in-
structions. If you use other washer fluids or soap solutions, the tiny holes in
the fan-shaped nozzles could become blocked. 

229
Checking and refilling levels
Brake fluid Checking the brake fluid level
The brake fluid is checked at the intervals given in the serv-
ice schedule.
Fig. 151 In the engine
compartment: Brake fluid
reservoir cover
– Read off the fluid level at the transparent brake fluid reservoir. It
should always be between the “MIN” and “MAX” marks.
The position of the brake fluid reservoir is shown in the corresponding en-
gine compartment illustration ⇒ page 273. The brake fluid reservoir has a
black and yellow cap.
The brake fluid level drops slightly when the vehicle is being used as the
brake pads are automatically adjusted as they wear.
However, if the level goes down noticeably in a short time, or drops below
the “MIN” mark, there may be a leak in the brake system. A display on the
instrument panel will warn you if the brake fluid level is too low ⇒ page 77.
WARNING
Before opening the bonnet to check the brake fluid level, read and ob-
serve the warnings ⇒ page 217.

Changing the brake fluid
The Maintenance Programme indicates the brake fluid
change intervals. We recommend that you have the brake fluid changed by an Authorised
Service Centre.
Before opening the bonnet, please read and follow the warnings ⇒ 
in
Safety instructions on working in the engine compartment on page 217 in
section “Safety notes for working in the engine compartment”.
Brake fluid absorbs moisture. In the course of time, it will absorb water from
the ambient air. If the water content in the brake fluid is too high, the brake
system could corrode. This also considerably reduces the boiling point of
the brake fluid. Heavy use of the brakes may then cause a vapour lock
which could impair the braking effect.
It is important that you use only brake fluid compliant with US standard
FMVSS 116 DOT 4. We recommend the use of Genuine SEAT brake fluid.
WARNING
Brake fluid is poisonous. Old brake fluid impairs the braking effect.
● Before opening the bonnet to check the brake fluid level, read and ob-
serve the warnings ⇒ page 217. 
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231
Checking and refilling levels
WARNING (Continued)
● Deactivate the anti-theft alarm by unlocking the vehicle before you
disconnect the battery! The alarm will otherwise be triggered.
● When disconnecting the battery from the vehicle electrical system,
disconnect first the negative cable and then the positive cable.
● Switch off all electrical consumers before reconnecting the battery.
Reconnect first the positive cable and then the negative cable. Never re-
verse the polarity of the connections. This could cause an electrical fire.
● Never charge a frozen battery, or one which has thawed. This could
result in explosions and chemical burns. Always replace a battery which
has frozen. A flat battery can freeze at temperatures around 0°C.
● Ensure that the vent hose is always connected to the battery.
● Never use a defective battery. This could cause an explosion. Replace
a damaged battery immediately.
CAUTION
● Never disconnect the battery if the ignition is switched on or if the en-
gine is running. This could damage the electrical system or electronic com-
ponents.
● Do not expose the battery to direct sunlight over a long period of time,
as the intense ultraviolet radiation can damage the battery housing.
● If the vehicle is left standing in cold conditions for a long period, protect
the battery from freezing. If it freezes it will be damaged. Checking the electrolyte level
The electrolyte level should be checked regularly in high-
mileage vehicles, in hot countries and in older batteries.
– Open the engine bonnet and the battery cover ⇒ 
in Safety in-
structions on working in the engine compartment on page 217
⇒ 
in Warnings on handling the battery on page 230.
– Check the colour display in the "magic eye" on the top of the
battery.
– If there are air bubbles in the window, tap the window gently
until they disperse.
The position of the battery is shown in the corresponding engine compart-
ment diagram ⇒ page 273.
The “magic eye” indicator, located on the top of the battery changes colour,
depending on the charge state and electrolyte level of the battery.
There are two different colours:
● Black: correct charge status.
● Transparent/clear yellow: the battery must be replaced. Contact a spe-
cialist workshop. 
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235
Wheels and tyres
WARNING
● Never adjust tyre pressure when the tyres are hot. This may damage
or even burst the tyres. Risk of accident!
● An insufficiently inflated tyre flexes a lot more at high speeds and
causes significant heating of the tyre. Under these conditions, the tyre
bead may be released or the tyre may burst. Risk of accident!
For the sake of the environment
Under-inflated tyres lead to increased fuel consumption and tyre wear. 
Significant tyre pressure loss
The tyre symbol  is displayed and indicates that the tyre pressure
of at least one tyre is insufficient.
– Stop the vehicle.
– Switch the engine off.
– Check the tyre(s).
– Change the wheel if necessary. Tyre service life
The service life of tyres is dependent on tyre pressure, driv-
ing style and fitting.
Fig. 152 Tyre tread wear
indicators
Fig. 153 Diagram for
changing wheels

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243
If and when
– All passengers should leave the vehicle. They should wait in a
safe area (for instance behind the roadside crash barrier).
– Switch off the engine. Switch on the hazard warning lights.
– Apply the handbrake firmly.
– Engage the first gear , or put the selector lever to position P for
those vehicles with an automatic gearbox.
– If you are towing a trailer, unhitch it from your vehicle.
– Take the vehicle tools and the spare wheel out of the luggage
compartment.
WARNING
Put the hazard warning lights on and place the warning triangle in posi-
tion. This is for your own safety and also warns other road users.
CAUTION
If you have to change the wheel on a gradient, block the wheel opposite the
wheel being changed by placing a stone or similar object under it to prevent
the vehicle from rolling away.
Note
Please observe legal requirements when doing so. 
Changing a wheel
Change the wheel as described below
– Pull off the hub cap. See ⇒ fig. 155. –
Slacken the wheel bolts.
– Raise the car with the jack at the corresponding point.
– Remove the wheel and then mount the spare wheel
– Lower the vehicle.
– Tighten the wheel bolts firmly with the box spanner.
– Replace the wheel trim. 
After changing a wheel
After changing the wheel there are still tasks to complete. – Put the tools and jack back in the luggage compartment.
– Place the wheel with the defective tyre in the luggage compart-
ment and secure it.
– Check the tyre pressure of the newly fitted tyre as soon as pos-
sible.
– Have the tightening torque of the wheel bolts checked as soon
as possible with a torque wrench. The prescribed torque must
be 120 Nm.
Note
● If you notice that the wheel bolts are corroded and difficult to turn when
changing a wheel, they must be replaced before having the wheel bolt tor-
que checked.
● For safety reasons, drive at moderate speeds until the wheel bolt tight-
ening torque has been checked. 
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273
Technical specifications
Technical specifications
Checking fluid levels
From time to time, the levels of the different fluids in the ve-
hicle must be checked. Never fill with incorrect fluids, other-
wise serious damage to the engine may be caused.
Fig. 185 Diagram for the
location of the various el-
ements
Coolant expansion tank
Windscreen washer fluid reservoir
Engine oil filler cap
Engine oil dipstick
Brake fluid reservoir
Vehicle battery (underneath the cover)
The checking and refilling of service fluids are carried out on the compo-
nents mentioned above. These operations are described in the ⇒ page 217.
1
23456
Overview
You will find further explanations, instructions and restrictions on the tech-
nical specifications as of
⇒ page 269. 
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

C
Car care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . 190
CCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Central lock button Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Central locking . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Automatic locking system for involuntaryunlocking . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Automatic speed dependent locking and unlocking system* . . . . . . . . . . . . . . . . . . 99
Emergency unlocking system . . . . . . . . . . . 99
Selective unlocking system* . . . . . . . . . . . . 98
Unlocking system* . . . . . . . . . . . . . . . . . . . . 99
Centre console with drink holder . . . . . . . . . . 138
Cetane number . . . . . . . . . . . . . . . . . . . . . . . . . 216
Changing gear see Manual gearbox . . . . . . . . . . . . . . . . . . 167
Changing gear in tiptronic mode . . . . . . . . . . 171
Changing the bulbs Main headlight bulbs . . . . . . . . . . . . . . . . . 255
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Changing the main headlight bulbs Main beam lights . . . . . . . . . . . . . . . . . . . . 257
Side lights . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Turn signal bulbs . . . . . . . . . . . . . . . . . . . . 256
Changing the main headlight lamps dipped lights . . . . . . . . . . . . . . . . . . . . . . . 256 Changing the tail light bulbs
Position light, fog light and tail light on thetailgate . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Changing the tail lights Luggage compartment lights . . . . . . . . . . 261
Turn signal, side and brake lights on thebody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Chassis number . . . . . . . . . . . . . . . . . . . . . . . . 270
Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Checking battery electrolyte level . . . . . . . . . . 231
Checking engine oil level . . . . . . . . . . . . . . . . . 221
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Child seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Categorisation in groups . . . . . . . . . . . . . . . 48
Group 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Group 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Group 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Groups 0 and 0+ . . . . . . . . . . . . . . . . . . . . . . 48
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 46
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Child seats ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . 51
on the front passenger seat . . . . . . . . . . . . . 31
Top Tether system . . . . . . . . . . . . . . . . . . . . 51
Cigarette lighter* . . . . . . . . . . . . . . . . . . . . . . . 140
Cleaning alloy wheel rims . . . . . . . . . . . . . . . . 204
Cleaning chrome . . . . . . . . . . . . . . . . . . . . . . . 203
Cleaning engine compartment . . . . . . . . . . . . 205
Cleaning steel wheel rims . . . . . . . . . . . . . . . . 204
Cleaning windows . . . . . . . . . . . . . . . . . . . . . . 202
Climatic* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Climatronic
General notes . . . . . . . . . . . . . . . . . . . . . . . 155
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Clothes hook . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Cloth seat covers cleaning . . . . . . . . . . . . . . . . 206
Cockpit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Coming/leaving home function . . . . . . . . . . . . 118
Compartment for on-board documentation . . 138
Control lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Control lighting . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Controls electric windows . . . . . . . . . . . . . . . . . . . . . 110
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . 130
Sliding/tilting sunroof . . . . . . . . . . . . . . . . 112
Convenience closing Sliding/tilting sunroof . . . . . . . . . . . . . . . . 113
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Convenience opening Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 66
Coolant level . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 82
Coolant loss . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Coolant temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Safety instructions . . . . . . . . . . . . . . . . . . . . 82
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 82
Correct adjustment of front seat head re- straints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Correct adjustment of rear seat head restraints In-use and non-use positions . . . . . . . . . . . 14
292 Index