engine Seat Mii 2014 Workshop Manual

Checking and refilling levels
Filling the tank Introduction The fuel tank flap is on the rear right of the
vehicle.
WARNING
Refuelling or handling fuel carelessly can
cause an explosion or fire resulting in serious
burns and injuries.
● Always make sure that you correctly close
the fuel cap to avoid evaporation and fuel
spillage.
● Fuels are highly explosive and inflammable
substances that can cause serious burns and
injuries.
● Fuel could leak out or be spilt if the engine
is not switched off or if the filler fuel nozzle is
not fully inserted into the tank filler neck
when refuelling. This could lead to a fire, ex-
plosion and severe injuries.
● When refuelling, turn off the engine and
turn off the ignition for safety reasons.
● Always turn off mobile telephones, radio
apparatus and other radio wave emitting
equipment before refuelling. Electromagnetic
waves could cause sparks and lead to a fire.
● Never enter the vehicle while refuelling. If it
is absolutely necessary to enter, close the
door and touch a metal surface before touch- ing the filler nozzle again. This will prevent
the generation of static electricity. Sparks
could cause a fire when refuelling.
●
Never handle fuel close to flames, sparks or
objects with slow combustion (e.g. ciga-
rettes).
● Avoid static electricity and electro-magnet-
ic radiation when refuelling.
● Observe the safety regulations of the serv-
ice station.
● Never spill fuel on the vehicle or in the lug-
gage compartment. WARNING
For safety reasons, SEAT does not recommend
carrying a spare fuel canister in the vehicle.
Fuel could be spilled and catch fire, above all
in case of an accident and this applies to a
full container as well as empty containers.
This could lead to explosions, fires and inju-
ries.
● Observe the following if you exceptionally
have to carry fuel in a canister:
–Never place a fuel container, to fill it, in-
side the vehicle or on the vehicle, for ex-
ample, in the luggage compartment. Fill-
ing in these circumstances could create
an electrostatic charge and spark that
could ignite fuel fumes.
– Always place the canister on the ground
to fill it. –
Insert the fuel nozzle into the neck of the
canister as far as possible.
– If you are using a metal fuel canister, the
nozzle must always touch the canister
while it is being filled to avoid static elec-
tricity.
– Follow the legal requirements for the use,
storage and transport of spare fuel canis- ters.
– Insure that the fuel container complies
with manufacturing standards, for exam-
ple, ANSI or ASTM F852-86. CAUTION
● Always remove any fuel spilled anywhere
on the vehicle to avoid damage to the wheel
housing, the tyre and vehicle paintwork.
● Refuelling a petrol engine with diesel can
cause serious engine and fuel system dam-
age; the resulting malfunctions are not cov-
ered by the SEAT warranty. If you refuel with
the wrong type of fuel, never start the engine.
This applies to even the smallest amount of
the wrong fuel. Seek specialist assistance.
With the engine running, the composition of
the wrong fuel could significantly damage the
fuel system and the engine itself. For the sake of the environment
Fuels can contaminate the environment. Col-
lect any spilt service fluids and allow a pro-
fessional to dispose of them. 139Technical specifications
Advice
Operation
Safety

Checking and refilling levelsFlashes for about 10
secondsState of the barsPossible cause ››› Solution
and the segments
remaining a)Reserve zone (four small segments)The fuel tank is almost empty.
The reserve tank is being used
››› page 203.Refuel as soon as possible ››› .
–The vehicle is running in natural gas operating mode.–
a)
This only applies to vehicles with the fuel gauge on the dash panel display.
Several warning and control lamps light up
for a few seconds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds.
In natural gas engines
The warning lamp  lights up when both fuel
type

s (petrol and natural gas) have reached
reserve level.
The warning lamp  lights up when the vehi-
cl

e is running in natural gas operating mode.
The warning lamp  switches off when the
natural gas is exhausted. The engine
changes to operate with petrol.
Problem:
if the vehicle is left parked for a
long time just after refuelling, the gas level
indicator does not accurately indicate the
same level shown after refuelling when the
vehicle is started up again. This is not due to
a leak in the system, but to a drop in pres-
sure in the gas tank for technical reasons af- ter a cooling phase immediately after refuel-
ling. WARNING
Driving with insufficient fuel reserve could re-
sult in the vehicle breaking down in traffic
and a serious accident.
● If the fuel level is too low then the fuel sup-
ply to the engine can become irregular espe-
cially on slopes.
● If the engine “is choked” or stalls due to
lack of or irregularity of the fuel supply, the
power steering as well as all of the driver as-
sistance systems including braking assis-
tance will stop working.
● Always refuel when there is only one quar-
ter of the fuel tank left to avoid running out of
fuel. CAUTION
● Always pay attention to any lit control
lamps and to the corresponding descriptions and instructions to avoid damage to the vehi-
cle.
● Never run the fuel tank completely dry. An
irregular fuel supply may lead to ignition
faults and unburnt fuel could enter the ex-
haust system. This could damage the catalyt-
ic converter. Note
The arrow next to the fuel pump symbol on
the instrument panel ››› Fig. 101 indicates the
s ide of

the vehicle on which the tank flap is
located. 141
Technical specifications
Advice
Operation
Safety

Advice
Refuelling with petrol Fig. 103
Open tank flap with tank cap attach-
ed to the holder Before refuelling, always turn off the engine,
the ignition, mobile telephones, auxiliary
heating and keep them off during refuelling.
Opening the fuel tank cap
● The tank flap is at the rear of the vehicle on
the right.
● Pull the rear zone of the fuel tank flap to
open.
● Unfold the key shaft if necessary
››› page 43 .
● Inser
t the vehicle key into the lock cylinder
of the fuel tank plug and turn the key in an
anticlockwise direction.
● Take out the fuel tank plug by turning it in
an anticlockwise direction and rest it on the
upper part of the fuel tank flap ››› Fig. 103. Ref
uelling
The correct petrol type for the vehicle is loca-
ted on a sticker inside the fuel tank flap
››› page 137.
● If the aut

omatic filler nozzle is operated
correctly, it will switch itself off as soon as
the fuel tank is full ››› .
● Do not continue to refuel if it is turned off!
Otherwise, this will fill the expansion cham-
ber and fuel may leak out if the ambient con-
ditions are warm.
Closing the fuel tank cap
● Screw on the fuel tank filler plug in a clock-
wise direction until it is fully inserted with a
click.
● Insert the vehicle key into the lock cylinder
of the fuel tank plug, turn the key in a clock-
wise direction and remove the key.
● Press the tank flap until you hear it click in-
to place. The tank flap must be flush with the
body contour. WARNING
Do not continue refilling once the fuel nozzle
has switched itself off. The fuel tank may be
filled too much. As a result, fuel may spurt
out and spill. This could lead to a fire, explo-
sion and severe injuries. CAUTION
● Always remove any fuel spilled anywhere
on the vehicle to avoid damage to the wheel
housing, the tyre and vehicle paintwork. For the sake of the environment
Fuels can contaminate the environment. Col-
lect any spilt service fluids and allow a pro-
fessional to dispose of them. Refuelling with natural gas
Fig. 104
Tank flap open: gas filler mouth 1 ,
filler mouth retainer 2 Before
refuelling, the engine and the igni-
tion, mo b

ile telephone and heating must be
switched off separately ››› .
It is also essential to carefully read the in-
structions for the natural gas pump.
142

Checking and refilling levels
The vehicle is only prepared for refuelling
with Compressed Natural Gas (CNG) ››› . Re-
fuelling with another type of natural gas is
not allowed, e.g. Liquefied Nature Gas (LNG)
or hydromethane.
Opening the fuel tank cap
The natural gas filler mouth is behind the fuel
tank cap, next to the petrol filler mouth.
● Unlock the vehicle with the key or with the
central locking button  situated on the driv-
er door ›
›
› page 48.
● Press on the rear area of the flap and open
it.
Refuelling
Problem:
If the ambient temperature is very
high, the natural gas pump protection
against overheating disconnects this auto-
matically.
● Remove the plug from the gas filler mouth
››› Fig. 104
1 .
● Connect the pump filling nozzle to the gas
filler mouth.
● The fuel tank will be full when the pump
c ompr

essor automatically cuts the supply.
● If you wish to finish refuelling in advance,
press the button on the pump to stop the
flow. Closing the fuel tank cap
●
Check that the gas filler mouth retainer 2 is not trapped with the filler nozzle. If neces-
sary, place it in the filler mouth again.
●
Insert the plug in the filler mouth.
● Close the tank flap. Make sure you hear it
click into place. WARNING
Natural gas is a highly explosive, easily flam-
mable substance. Incorrect handling of the
natural gas can cause accidents serious
burns and other injuries.
● Before refuelling with natural gas, the fill-
ing mouth must be correctly engaged. If you
can smell gas, stop refuelling immediately. WARNING
The vehicle is not prepared to use liquefied
natural gas (LNG) and this fuel must not be
added under any circumstances. Liquefied
natural gas can cause the natural gas tank to
explode, resulting in serious injury. Note
● The filling nozzles of natural gas pumps
can differ in the way they are operated. If you
are unacquainted with the pump, it is advisa-
ble that a member of staff of the service sta-
tion performs the refuelling operation. ●
Noises heard when refuelling are normal
and do not indicate the presence of a fault in
the system.
● The vehicle natural gas system is prepared
both for refuelling with a small compressor
(slow refuel) and a large compressor (fast re-
fuel) in natural gas service stations. Bonnet
Working in the engine compartment Before working in the engine compartment,
make sure that the vehicle is parked on hori-
zontal and firm ground.
The engine compartment of the vehicle is a
hazardous area. Never work on the engine or
in the engine compartment if you are not fa-
miliar with the operations to be carried out,
the applicable safety standards and especial-
ly if you do not have the necessary instru-
ments, liquids and tools
››› ! If required,
have any work carried out by a specialised
workshop. Negligent work can cause serious
injury. WARNING
If the vehicle moves unexpectedly, this could
cause serious injury. » 143
Technical specifications
Advice
Operation
Safety

Advice
●
Never work under the vehicle if it has not
been immobilized. If you must work under-
neath the vehicle with the wheels in contact
with the ground then it should be parked on
flat ground, the wheels should be prevented
from moving and the key should be removed
from the ignition.
● If you have to work underneath the vehicle,
you must use suitable stands additionally to
support the vehicle, there is a risk of acci-
dent!. The jack is not intended for this kind of
work and its failure could lead to severe inju-
ries.
● Disconnect the Start-Stop system. WARNING
The engine compartment is a dangerous area
capable of causing serious injury.
● For all type of work, always take the utmost
precautions, work carefully and note the gen-
eral safety standards in force. Never take per-
sonal risks.
● Never work on the engine or in the engine
compartment if you are not familiar with the
necessary operations. If you are not sure
about procedures then visit a specialised
workshop to carry out the necessary work.
Working incorrectly can cause serious inju-
ries.
● Never open the bonnet if you see steam or
coolant escaping from the engine compart-
ment. This may cause serious burns. Always
wait until you cannot see or hear the sound of steam or coolant coming from the engine
compartment.
●
Always allow the engine to cool down be-
fore opening the bonnet.
● Contact with hot elements of the engine
and the exhaust system can cause burns.
● Once the engine has cooled, follow the in-
structions below before opening the bonnet:
– Engage the handbrake and place the gear
selector lever in N or the gear stick in
neutral.
– Remove the key from the ignition.
– Keep children away from the engine com-
partment and never leave them unsuper-
vised.
● When the engine is warm or hot, the cool-
ing system is pressurised. Do not unscrew
the cap on the expansion tank when the en-
gine is hot. Otherwise, coolant may spray out
under pressure causing burns and serious in-
jury.
– After cooling, carefully and slowly un-
screw the cap anticlockwise, gently
pressing down on it.
– Always protect your face, hands and arms
from hot coolant and steam using a large,
thick cloth.
● When refilling liquids, avoid spilling them
on parts of the engine and the exhaust sys-
tem. Spilled liquids could cause a fire. WARNING
The high voltages of the electrical system can
give electric shocks as well as causing burns
and serious injury and possibly even death!
● Never cause short circuits in the electrical
system. The battery could explode.
● To minimise the risk of electric shock and
serious consequences while the engine is
running or starting the engine, note the fol-
lowing:
– Never touch the electrical wiring of the
ignition system. WARNING
In the engine compartment, there are rotat-
ing parts that could cause serious injury.
● Never place your hands directly on or near
the radiator fan. Touching the rotor blades
could seriously harm you. The ventilator
works according to the engine temperature
and could start suddenly even when the igni-
tion is turned off and the key is removed.
● If any work has to be performed when the
engine is started or with the engine running,
there is an additional, potentially fatal, safety
risk from rotating parts, such as the drive
belts, alternator, radiator fan, etc., as well as
from the high-voltage ignition system. Al-
ways work with the utmost caution.
– Always make sure that no parts of your
body, jewellery, ties, loose clothing and
long hair can be trapped by the rotating 144

Checking and refilling levels
parts of the engine. Before any work, re-
move ties and jewellery (necklaces, etc),
tie long hair back and tie all items of
loose clothing to your body to make sure
that they cannot be trapped by engine
components.
– Take extreme caution when operating the
accelerator and remain attentive. The ve-
hicle could move, even if the handbrake
is applied.
● Always make sure you have not left any ob-
jects, such as cleaning cloths and tools, in
the engine compartment. If any object is left
in the engine compartment, this could cause
malfunctions, engine faults and even a fire. WARNING
Refill liquids and certain materials can catch
fire easily in the engine compartment, caus-
ing a fire and serious injury!
● Never smoke.
● Never work close to places exposed to
flames or sparks.
● Never pour service fluids over the engine.
These fluid may ignite hot engine parts and
cause injuries.
● If it is necessary to work on the fuel system
or the electrical system, please follow the in-
structions below:
–Always disconnect the vehicle battery.
– Never work close to heaters, heat sources
or places exposed to flames or sparks. ●
Always keep a recently serviced and per-
fectly working fire extinguisher close by.
● Never cover the engine with additional in-
sulating materials such as a blanket. Risk of
fire! CAUTION
When refilling or changing service liquids,
ensure that you put the liquids into the right
tank. Making a mistake when refilling could
cause serious malfunctions and damage the
engine! For the sake of the environment
Service fluids leaks are harmful to the envi-
ronment. For this reason you should make
regular checks on the ground underneath
your vehicle. Take the vehicle to a specialised
workshop to be checked if you see stains, oil
or other fluids on the ground. Collect any
spilt service fluids and allow a professional to
dispose of them. Opening and closing the bonnet
Fig. 105
A: Release lever in the footwell on
the driver side B: Release lever on the bonnet » 145Technical specifications
Advice
Operation
Safety

Advice
Fig. 106
C: Bonnet securing rod in the bon-
net. D: Bonnet supported by the bonnet se-
curing rod Opening the bonnet
● Before opening the bonnet, make sure that
the windscreen wiper arms are in place
against the windscreen ››› .
● Pull the release lever 1 in the direction of
the arrow ›››
Fig. 105
A. The bonnet is re- leased from the lock carrier by a spring mech-
anism
››› .
● Lift the bonnet up slightly while pressing
the release lever 2
B
in the direction of the
arr

ow to completely open the bonnet.
● Take out the bonnet support rod from its
clip in the direction of the arrow 3
C
and
p

lace it in the corresponding open position
4
D
(arrow).
C

losing the bonnet
● Slightly lift the bonnet ››› .
● Take out the bonnet support rod from the
opening catch 4
D
and insert it into its clip
3
C
in the opening catch.
● L

et the bonnet fall from a height of 30 cm
into its clip; Do not
apply pressure!
If the bonnet is not correctly closed, open it
once again and close it correctly.
The bonnet is correctly closed when it is flush
with the corresponding parts on the body-
work. WARNING
If the bonnet is not correctly closed, it could
suddenly open while driving leaving the driv-
er without visibility. This could result in a se-
rious accident.
● After closing the bonnet, always check that
it is properly secured by the locking mecha-
nism in the lock carrier piece. The bonnet must be flush with the surrounding body pan-
els.
●
While driving, if you notice that the bonnet
is not correctly closed then stop immediately
and close it correctly.
● Only open and close the bonnet when there
is nobody within its range. CAUTION
● To avoid damage to the bonnet and to the
windscreen wiper arms, only open it when
the windscreen wipers are in place against
the windscreen.
● Before driving, always lower the wiper
arms. Engine oil
Introduction WARNING
Incorrectly handling engine oil can cause in-
jury and serious burns.
● Always protect your eyes when handling
engine oil.
● Oil is toxic and must be kept out of the
reach of children.
● Engine oil should only be kept in its origi-
nal packaging; the same goes for used oil un-
til it is disposed of. 146

Checking and refilling levels
●
Never store engine oil in empty food con-
tainers or bottles as other people may acci-
dentally drink it.
● Regular contact with engine oil can be bad
for the skin. If you come into contact with en-
gine oil, wash your skin with soap and water.
● With the engine running, the engine oil
gets extremely hot and can cause severe skin
burns. Always wait until the engine has fully
cooled. For the sake of the environment
Similar to the other service liquids, spilled
engine oil can be bad for the environment.
Collect these liquids in suitable containers
and dispose of them while respecting the en-
vironment. Warning and control lampsFlashesPossible
causeSolution

Engine oil
pressure too
low. 
Stop the vehicle!
Switch off the engine. Check
the engine oil level, and if
necessary, refill with
››› page 148.
engine oil - If the warning in-
dicator flashes although the
oil level is correct, do not
continue driving or leave the
engine running. Otherwise,
the engine could be dam-
aged. Seek specialist assis-
tance. WARNING
Observe the safety warnings ››› in Control
and warning lamps on page 40. Engine oil specifications
Replacement engine oil must strictly comply
with the specifications.
The correct oil must be used to ensure the
correct operation and long service life of the
engine. The engine comes with a high-quality
multigrade oil that can generally be used all
year round.Only use an engine oil that complies to SEAT
standards whenever possible
››› . Only refill
engine oil using approved engine oil in ac-
cordance with the corresponding VW stand-
ard ( ››› table on page 147 ). All oils indicated
ar e synthetic multigrade oils .
Engine oils are being continuously further
developed. Technical services are constantly
updated with any modifications. SEAT there-
fore recommends that you have the engine
oil changed by a technical service.
Engines
Specifications of en- gine oil with a serv- ice dependent on
time/distance travel- led
44 kW - 55 kW Petrol en-ginesVW 504 00, VW 502 00
Natural gas engineVW 502 00 CAUTION
● Only use engine oils whose specifications
are expressly approved by SEAT. The use of
any other type of oil could cause engine dam-
age!
● No additives should be used with engine
oil. Any damage caused by the use of such
additives would not be covered by the factory
warranty. 147
Technical specifications
Advice
Operation
Safety

Advice
Checking the engine oil level and
topping up Fig. 107
Marked engine oil dipstick Fig. 108
In the engine compartment: Engine
oil filler cap. Preparations
● Park the vehicle on flat ground so that the
engine oil reading is correct.
● The engine must be hot to be able to check
the engine oil level. Stop the engine and wait a few minutes for the oil to drain back into
the sump.
●
Open the bonnet  ››› page 143.
● The engine oil filler neck can be recognised
by the symbol  on the cap
›
›› Fig. 108 and
the dipstick by its coloured handle.
Check the engine oil level
● Pull out the dipstick and wipe it on a clean
cloth.
● Replace the dipstick, pushing it in as far as
it will go. If the dipstick to measure engine oil
has a mark, when you reintroduce it this
mark should slot into the corresponding
groove located on the upper end of the tube.
● Remove the dipstick again and check the
engine oil level ››› table on page 148.
● After reading the oil level, replace the dip-
stick in the tube completely.
Engine oil topping up ranges
Fig. 107Operations required depending on
the engine oil level:
Area ADo not top up oil
››› .
Area BYou can add oil, but keep the level in this
zone.
Area COil
must be added. After topping up the oil
level should be in area B. Adding oil after checking the level
Only add engine oil in small quantities and in
steps:
●
Unscrew the cap from engine oil filler neck
on the cylinder head ››› Fig. 108 . If you are
not s

ure where the cap is, request help from
a specialist.
● Only refill using approved SEAT engine oil
in small quantities (no more than 0.5 ltr)
››› page 147.
● To av

oid adding too much oil, each time
you add a quantity, wait until the oil has flow-
ed into the crankcase so that it can be meas-
ured with the dipstick.
● Check the oil level before adding any more
oil. Do not top up with too much engine oil
››› .
● When the oil level is in at least the
››› Fig. 107 B zone, insert the dipstick into
the tube fully to avoid engine oil escaping
when the engine is running.
● After topping up the oil, ensure that the
cap is screwed on to the filler neck correctly. WARNING
Oil could catch fire if it comes into contact
with hot engine components. This could lead
to a fire, explosion and severe injuries.
● Always ensure that after topping of oil, the
engine oil filler cap is correctly tightened. 148

Checking and refilling levels
This will avoid engine oil spilling onto hot
engine parts when the engine is running.
CAUTION
● If the engine oil level is above the area Ado not start the engine. Seek specialist assis-
tance. Otherwise catalytic converter and en-
gine damage may occur.
● When refilling or changing service liquids,
ensure that you put the liquids into the right
tank. Making a mistake when refilling could
cause serious malfunctions and damage the
engine! For the sake of the environment
The oil level must never be above area A .
Otherwise oil can be drawn in through the
crankcase breather and escape into the at-
mosphere via the exhaust system. Engine oil consumption
The consumption of engine oil can be differ-
ent from one engine to another and can vary
during the useful life of the engine.
Depending on how you drive and the condi-
tions in which the vehicle is used, oil con-
sumption can be up to 1 ltr./2000 km. In the
case of new vehicles, the consumption can
exceed this figure over 5,000 kilometres. For
this reason the engine oil level must be checked at regular intervals, preferably when
filling the tank and before a journey.
When the engine is working hard, for in-
stance during sustained high-speed motor-
way cruising in summer or when climbing
mountain passes, the oil level should pref-
erably be kept within area
››› Fig. 107 A .
Changing the engine oil The engine oil must be changed regularly ac-
cording to the specifications of the Mainte-
nance Programme.
Due to the problems linked with disposing of
used oil and the need for suitable tools and
special knowledge, always visit a specialised
workshop to have the engine oil and filter
changed. SEAT recommends taking your car
in for technical service.
Detailed information on the service intervals
is shown in the Maintenance Programme.
Engine oil additives make new oil darker after
the engine has been running for a short peri-
od. This is normal and does not mean more
frequent oil changes are required.
WARNING
If, in exceptional circumstances, you must
change the engine oil yourself, please note
the following: ●
Wear eye protection.
● Always wait until the engine has complete-
ly cooled to avoid being burned.
● Always keep your arms horizontal when un-
screwing the oil drainage bolt so that it does
not run down your arms.
● Use a suitable container large enough to
collect all of the used oil in the engine.
● Never collect engine oil in empty food con-
tainers, cans, bottles or other containers as
not all people are able to identify engine oil.
● Oil is toxic and must be kept out of the
reach of children. For the sake of the environment
Before changing the engine oil, find a suita-
ble location or service for proper disposal. For the sake of the environment
Always dispose of engine oil with the utmost
respect for the environment. Never dispose of
used engine oil in places such as a garden,
woods, drains, roads, paths, rivers and drain-
age systems. 149Technical specifications
Advice
Operation
Safety