2017 Seat Mii engine

Operation
Possible malfunction in the laser sensor
If l
a
ser sensor operation is impaired, for ex-
ample due to heavy rain, mist, snow or dirt,
the City Safety Assist system function is tem-
porarily switched off. On the instrument pan-
el display the control lamp  flashes.
When the fault in the laser sensor has been
rectified, the City Safety Assist system func-
tion automatically becomes available again.
The control lamp  switches off.
The following conditions could prevent the
City Safety Assist system from functioning:
● Tight bends.
● Accelerator pressed all the way down to the
floor.
● If the C

ity Safety Assist system is switched
off or there i
s a fault ››› page 157.
● If the laser sensor is dirty, covered or over-
heated ›

›› page 158.
● In the event of snow, heavy rain or dense
fog.
● If ther

e are vehicles in front.
● Vehicles changing lanes.
● Vehicles moving in the opposite direction
in the same lane.
● V

ery dirty vehicles with a low degree of re-
flection.
● Pre

sence of thick dust. Hill driving assistant*
Operation This function is only included in vehicles with
ESC.
The hi
l

l driving assistant helps the driver to
move off and upward on a hill when the vehi-
cle is stationary.
The system maintains brake pressure for ap-
proximately two seconds after the driver
takes his foot off the brake pedal to prevent
the vehicle from lurching backward when it is
started. During these 2 seconds, the driver
has enough time to release the clutch pedal
and accelerate without the vehicle moving
and without having to use the handbrake,
making start-up easier, more comfortable
and safer.
These are the basic operation conditions:
● being on a ramp or hill/slope,
● doors closed,
● vehicle completely stationary,
● engine running and foot on the brake,
● besides having a gear engaged or being in
neutral f

or manual gear change and with the
selector lever at positions S, D or R in vehi-
cles with an automatic gearbox.
This system is also active when reversing up-
hill. WARNING
● If y

ou do not start the vehicle immediately
after taking your foot off the brake pedal, the
vehicle may start to roll back under certain
conditions. Depress the brake pedal or use
the hand brake immediately.
● If the engine stalls, depress the brake ped-
al or u
se the hand brake immediately.
● When following a line of traffic uphill, if you
want t
o prevent the vehicle from rolling back
accidentally when starting off, hold the brake
pedal down for a few seconds before starting
off. Note
The Official Service or a specialist workshop
can t el

l you if your vehicle is equipped with
this system. Start-Stop System
C ontr
o

l lamps 
It lights up
The Start-Stop system is enabled.
160

Driver assistance systems
It lights up
The Start-Stop sys-
tem is enabled but
the engine cannot
be automatically
stopped.
Contact a specialised workshop.

It lights up
The Start-Stop sys-
tem cannot start the
engine.Start the engine by hand using
the vehicle's key
››› page 133.
There is a fault in the
alternator.››› page 196 
Flashes
The Start-Stop sys-
tem is not available.Contact a specialised workshop.
Some warning and control lamps will light up
briefly
when the ignition i
s

switched on to
check certain functions. They will switch off
after a few seconds. WARNING
Observe the safety warnings ›››
in On the
ins trument
panel on page 26. Start-Stop system
Fig. 158
At the top of the centre console:
St ar
t

-Stop system button. With the Start-Stop system enabled, the en-
gine i
s
aut

omatically stopped when the vehi-
cle is at a standstill. It will start again auto-
matically as required.
This function remains enabled while the igni-
tion is switched on. The instrument panel dis-
play shows information on the current status
››› page 160.
Disconnect the Start-Stop system by hand
whenever crossing water.
Vehicles with a manual gearbox
● When the vehicle is stopped, put it into
neutral and r
elease the clutch pedal. The en-
gine will stop.
● To restart, simply engage the clutch. Vehicles with an automatic gearbox
●
When the vehicle is at a standstill, depress
the brake or k
eep it pressed down. The en-
gine switches off.
● The engine will start again as soon as you
rele
ase the brake pedal.
● With the selector lever set to position N,
the engine wi
ll not start until a range of gears
is selected or the accelerator pedal is de-
pressed.
Important conditions for the engine to stop
automatically
● The driver's seat belt must be fastened.
● The driver door must be closed.
● The bonnet must be closed.
● The engine must have reached a minimum
temperat
ure.
● The vehicle must have moved since the last
time the engine wa
s stopped.
● The vehicle's battery must be sufficiently
char
ged.
● The battery temperature must not be too
low or too high.
● The

vehicle must not be on a very steep
slope. »
161
Technical data
Advice
Operation
Emergencies
Safety

Operation
Conditions for the engine to restart automat-
ic a
l
ly
The engine can be automatically restarted in
the following cases:
● If the vehicle starts to moves.
● If the battery voltage drops.
Conditions
requiring engine start-up using
the key
The engine has to be manually started in the
following cases:
● If the driver unbuckles his/her seat belt.
● If the driver door is opened.
● If the bonnet is opened.
Switc
hing the Start-Stop system on and off
● Press the button  situat
ed in the centre
console ››› Fig. 158.
● The button will light up when the Start-Stop
syst
em is switched off.
The engine will start immediately if the vehi-
cle is in Stop mode when the system is
switched off by hand. WARNING
The smart technology included in the hill
hol d c

annot change the laws of physics. Do
not let the extra convenience afforded by the hill hold tempt you into taking any risks
when drivin
g.
● An

y accidental movement of the vehicle
coul
d result in serious injury.
● The hill hold is not a replacement for driver
awar
eness.
● Adjust your speed and driving style to visi-
bility
, weather, road and traffic conditions.
● The hill hold cannot always keep the vehi-
cle at
a standstill on a slope or brake suffi-
ciently when travelling downhill (e.g. on slip-
pery or frozen surfaces). WARNING
The brake servo and the electromechanical
st eerin

g do not work when the engine is
switched off.
● The vehicle must never be allowed to move
with the engine sw
itched off.
● Disconnect the Start-Stop system before
workin
g in the engine compartment. CAUTION
The vehicle's battery could be damaged if the
vehic l

e is used for long periods at very high
outside temperatures. Note
In some cases, it may be necessary to start
the engine b y

hand using the key. Refer to the corresponding control lamp on the instru-
ment p
anel

.162

Advice
Advice
C ar
e and m
aintenance
Accessories, replacement of
parts and modifications Introduction WARNING
The use of spare parts and accessories, or in-
corr ectly

performed modifications or repairs
may result in damage to the vehicle, acci-
dents and serious injury.
● SEAT strongly recommends you to only use
SEAT ap
proved accessories and SEAT ®
origi-
nal spare parts. These parts and accessories
have been specially tested by SEAT for suita-
bility, reliability and safety.
● Have any repairs or modifications carried
out at a s
pecialised workshop. These work-
shops have the necessary tools, diagnostics
equipment, repair information and qualified
personnel.
● Only mount parts with the same specifica-
tions a
s the parts fitted at factory.
● Never mount, fasten or fit objects such as
drink hol
ders or telephone cradles over the
covers of the airbag modules or within their
deployment zones. ●
Only u

se wheels and tyre combinations
which have been approved by SEAT for your
vehicle type. Accessories and spare parts
SEAT recommends you consult an Official
Serv
ic

e before purchasing accessories and
spare parts or consumables. For example,
when fitting accessories at a later date, or
when replacing a component. A SEAT Official
Service will advise you as to the legal require-
ments and manufacturer's recommendations
regarding accessories, spare parts and other
components.
SEAT recommend you use only approved
SEAT accessories and genuine SEAT spare
parts ®
. These parts and accessories have
been specially tested by SEAT for suitability,
reliability and safety. In addition, SEAT tech-
nical services will guarantee that assembly is
performed professionally.
Although we continually monitor the market,
SEAT cannot guarantee that products not ap-
proved by SEAT are reliable, safe or suitable
for the vehicle. Therefore, SEAT cannot accept
liability, even in those cases authorised by
an officially recognised technical inspection
office or other official body.
Any retro-fitted equipment which has a direct
effect on vehicle control must be approved by SEAT for use in your vehicle and bear the
e
mark (the E

uropean Union's authorisation
symbol). This includes cruise control systems
or electronically controlled suspension.
If any additional electrical devices are fitted
which do not serve to control the vehicle it-
self, these must bear the  mark (European
Union manufacturer conformity declaration).
This includes refrigerator boxes, laptops or
ventilator fans. WARNING
Unprofessional repairs or modifications to
the v ehic

le may affect the performance of the
airbags, and may cause operating faults or fa-
tal accidents.
● Never mount, fasten or fit objects such as
drink hol
ders or telephone cradles over or
next to the covers of the airbag modules or
within their deployment zones.
● Objects placed over the airbag covers, or
within their deplo
yment zones, could lead to
serious injury or loss of life if the airbags are
triggered. Service fluids and components
All vehicle fluids and consumables
, suc
h a
s
notched belts, tyres, coolant fluids, engine
oils, spark plugs and batteries are continual-
ly being developed. Therefore all fluids and
164

Care and maintenance
consumables should be changed at a speci-
ali sed w
ork
shop. Technical services are per-
manently informed of any modifications. WARNING
The incorrect use or handling of fluids or con-
sum ab

les may result in accident, serious in-
jury, burns or intoxication.
● Therefore, fluids must always be stored
closed in their origin
al container.
● Never store fluids in empty food containers
or bottles
as other people may accidentally
drink the fluid.
● Keep all fluids and consumables out of
reac
h of children.
● Read and observe the information and
warning
s given on the fluid containers.
● Only work in the open air or in well-ventila-
ted z
ones, when using products which give
off harmful vapours.
● Never use fuel, turpentine, engine oil, ace-
tone or any
other volatile liquid in the main-
tenance of the vehicle. These are toxic and
highly flammable. They could lead to fire or
explosions! CAUTION
● Only u

se appropriate fluids. Do not confuse
fluids as this can cause serious malfunctions
or engine damage.
● Accessories and other components moun-
ted in front
of the air inlet reduce the cooling effect of the coolant. If the engine is running
under gr
e

at strain in high outside tempera-
tures, it could overheat. For the sake of the environment
Leaking fluids could pollute the environment.
C o l

lect any spilt fluids in suitable containers
and dispose of them in accordance with legis-
lation and with respect for the environment. Repairs and technical changes
When performing repairs and technical mod-
ific
ation
s,

SEAT's directives must be ob-
served! ››› Unauthorised modifications to the electronic
c
omponents
or sof

tware in the vehicle may
cause malfunctions. Due to the way the elec-
tronic components are linked together in net-
works, other indirect systems may be affec-
ted by the faults. This may significantly affect
the vehicle's performance, increase compo-
nent wear and could mean that the vehicle
registration documents are no longer valid.
Your SEAT Official Service cannot be held lia-
ble for any damage caused by technical mod-
ifications or repairs performed incorrectly.
The SEAT Official Service does not accept lia-
bility for damage resulting from technical
modifications or repairs performed incorrect- ly; neither is the SEAT warranty valid in these
case

s.
SEAT recommends you have any technical
modifications or repairs performed at a SEAT
Official Service and that you use genuine
SEAT spare parts ®
.
Vehicles with special accessories and equip-
ment
The manufacturers of additional equipment
guarantee that the equipment complies with
applicable laws and regulations with respect
to the environment, in particular Directives
2000/53/CE and 2003/11/CE. The first direc-
tive governs the disposal of end-of-life vehi-
cles while the second refers to the restric-
tions on the marketing and use of certain
dangerous substances and preparations.
The vehicle owner should keep the documen-
tation for the additional equipment safely
and hand it over to the scrap yard at the end
of the vehicle's service life. This ensures that
any additional equipment mounted in end-of-
life vehicles is correctly disposed of with re-
spect for the environment. WARNING
Repairs or modifications which are not per-
formed c orr

ectly may result in damage or er-
rors in the vehicle operation, affecting the ef-
fectiveness of the driver assist systems. This
could result in serious accident. » 165
Technical data
Advice
Operation
Emergencies
Safety

Care and maintenance
The optimal reach of the equipment is only
ac hiev
ed w
ith an external aerial.
Check first with a specialised workshop that
understands the technical possibilities of in-
stallation if you wish to use a two-way radio
with a transmitting power of over 10 watts.
SEAT recommends taking your car in for tech-
nical service.
All legal requirements, together with the in-
structions for the use of two-way radios must
be observed. WARNING
If the two-way radio is not securely fastened
in pos ition, it

could be sent flying around the
vehicle in the event of sharp braking, sudden
manoeuvres or accident, causing injury.
● While driving, two-way radios must be se-
curely
fastened in position, outside the air-
bags deployment zones, or safely stowed
away. WARNING
When using a two-way radio without a con-
nection to an e xt

erior aerial, the maximum
permitted levels of electromagnetic radiation
may be exceeded. This is also the case if the
aerial has not been correctly installed.
● You should only use a two-way radio inside
the vehic
le if it has first been correctly con-
nected to an exterior aerial. Information stored by the control
u
nit
s Your vehicle is fitted at the factory with a ser-
ies
of

electronic control units responsible for
the engine and gearbox management. In ad-
dition, the control units supervise the per-
formance of the exhaust gas system and the
airbag systems.
Therefore, while the vehicle is being driven,
these electronic control units are continuous-
ly analysing the vehicle data. In the event of
faults or deviations from the theoretical val-
ues, only this data is stored. Normally, the
warning lamps on the instrument panel light
up in the event of faults.
This data can only be read and analysed us-
ing special equipment.
The storing of the data allows specialised
workshops to detect and repair faults. Stored
data may include:
● Data relating to the engine or the gearbox
● Speed
● Direction of travel
● Braking force
● Detection of seat belt
The v ehic

le control units never record conver-
sations held by passengers in the vehicle.
In vehicles equipped with an emergency call
function via the mobile phone or other appli- ances connected in the vehicle, it is possible
to send the v

ehicle position. If the control
unit records an accident with airbag activa-
tion, the system may automatically send a
signal. This will depend on the network oper-
ator. Normally, transmission is only possible
in areas with good coverage.
Event Data Recorder
The vehicle is not fitted with an event data re-
corder.
An event data recorder temporarily stores the
vehicle information. Therefore, in the event of
an accident, it is possible to obtain detailed
information about how the accident occur-
red. Vehicles with airbag systems can store
data relating to impact speed, seat belt sta-
tus, seat positions and airbag activation
times may be stored, etc. The volume of data
depends on the manufacturer.
Event data recorders can only be mounted
with authorisation from the vehicle owner
and, in some countries, they are governed by
local legislation.
Reprogramming control units
On the whole, all the data required for the
component management is stored in the con-
trol units. The programming of certain con-
venience functions, such as the turn signals,
individual door opening and instructions on
the display can be modified using special »
167
Technical data
Advice
Operation
Emergencies
Safety

Care and maintenance
●
Whil e driv
ing, the mobile telephone, other
equipment including telephone accessories
such as telephone supports, notepads and
navigators must be correctly secured, away
from the airbags deployment zones, or stored
in a safe place. WARNING
When using a mobile telephone or two-way
r a dio w

ithout connecting an external aerial,
the maximum permitted levels of electromag-
netic radiation in the vehicle may be excee-
ded, thus putting the driver and the rest of
the vehicle occupants in danger. This is also
the case if the aerial has not been correctly
installed.
● A minimum of 20 centimetres should be
kept betw
een mobile phone aerials and artifi-
cial pacemakers, as mobile telephones may
affect the working of pacemakers.
● Do not keep mobile phones in breast pock-
ets dir
ectly above pacemakers.
● Immediately switch off the mobile tele-
phone if y
ou suspect any interference with
pacemakers or other types of medical equip-
ment. Support points for raising the vehicle
Fig. 159
Front jacking points for raising vehi-
c l
e w

ith lifting platform or jack Fig. 160
Rear jacking points for raising vehi-
c l
e w

ith lifting platform or jack Always use the jacking points indicated in
the figur
e
s

››› Fig. 159 and ››› Fig. 160 when
raising the vehicle. If the vehicle is not lifted
at these points, it could be seriously dam-
aged ››› or lead to serious injury
›
››

.The vehicle should not be lifted using lifting
p
latf

orms with lift pads containing fluid.
When raising a vehicle using a platform or
jack, a series of precautionary measures are
required. Do not raise the vehicle with a lift-
ing platform or jack unless you have received
training in how to do so and know how to do
so safely.
Notes on raising the vehicle with a jack
››› page 72. WARNING
The improper use of the lifting platform or
the jac k

when raising the vehicle may result
in accidents or serious injury.
● Before raising the vehicle, please observe
the manufact
urer's instructions for the plat-
form or jack, and the legal requirements,
where applicable.
● There should not be anyone inside the ve-
hicle when it
is being raised or once it is in
the air.
● Only use the jacking points indicated in the
figures
››› Fig. 159 and ››› Fig. 160 when rais-
ing the vehicle. If the vehicle is not lifted at
the indicated points, it may fall from the plat-
form while the engine or gearbox is being
dismounted, for example.
● The jacking points should be centrally
aligned and firmly
positioned on the platform
support plates. » 169
Technical data
Advice
Operation
Emergencies
Safety

Advice
●
Never s t
art the engine when the vehicle is
raised! The vehicle may fall from the platform
due to the engine vibrations.
● If it is necessary to work underneath the ve-
hicle whi
le it is raised, you should check that
the supporting stands have an adequate load
capacity.
● Never climb onto the lifting platform.
● Always make sure that the weight of the ve-
hicle doe
s not exceed the lifting platform
load capacity. CAUTION
● Never r ai

se the vehicle at the engine oil
sump, the gearbox or the rear or front axles.
● Always use an intermediate rubber support
to prev
ent damage to the vehicle underbody.
Check that the arms of the lifting platform are
able to move with obstruction.
● The arms should not come into contact with
the side runnin
g boards or other parts of the
vehicle. Caring for and cleaning the ve-
hic
le e

xterior
Introduction Regular maintenance and washing help to
m
aint
ain the

value of the vehicle. This may
also be one of the requirements for acknowl- edging warranty claims in the event of body-
work c

orrosion or paint defects.
Products suitable for the care of your vehicle
are available at any technical service. WARNING
Car-care products may be toxic and hazard-
ous. If c

ar care products are not suitable or
are used inappropriately, this could result in
accident, serious injury, burns or intoxica-
tion.
● Car care products must always be stored in
the original
container which should be kept
closed.
● Observe information provided by the manu-
factur
er.
● To prevent confusion, never store car care
products
in empty food cans, bottles or other
containers.
● Keep all care products out of reach of chil-
dren.
● Harmfu

l vapours may be produced when us-
ing car c
are products. Therefore, care prod-
ucts should only be used in well-ventilated
spaces or in the open air.
● Never use fuel, turpentine, engine oil, ace-
tone or any
other volatile liquid to wash,
clean or care for the vehicle. These are toxic
and highly flammable. WARNING
Inappropriate care and cleaning of vehicle
component s

may effect the vehicle safety
equipment, increasing the risk of severe in-
jury.
● Vehicle components should only be
cle
aned and maintained in accordance with
the manufacturer's instructions.
● Only use approved or recommended care
products. CAUTION
Cleaning products which contain solvents will
dam ag

e the material. For the sake of the environment
Only wash the vehicle in areas allocated for
this p

urpose, to prevent dirty water which
may be contaminated by oil, grease or fuel,
from entering the drains. In some places,
even washing it outside the planned areas is
banned. For the sake of the environment
Where possible, always use products which
re s

pect the environment. For the sake of the environment
The remains of car care products should not
be dis po

sed of with ordinary household170