light Seat Mii 2017 Repair Manual

Operation
●
Alw a
ys adapt your driving style to suit the
flow of traffic.
● Only use the kick-down function or rapid
accel
eration if visibility, weather, road and
traffic conditions so permit.
● Never put other road users in danger by ac-
celer
ating or with your driving style. CAUTION
If you stop on a hill with a gear range engag-
ed, do not try

to prevent the vehicle from roll-
ing back by pressing on the accelerator. Oth-
erwise, the automatic gearbox may overheat
causing damage. Automatic gearbox malfunction
Back-up programme
When aut
om
atic

gearbox warning and indica-
tion lamps light up on the instrument panel,
there may be a system malfunction
››› page 142. In the event of some faults the
automatic gearbox functions using a backup
programme. When the programme is activa-
ted, it is possible to drive the vehicle, howev-
er, at low speeds and within a selected range
of gears.
With the manual gearbox, in some cases it is
not possible to drive with all the gears .
In all cases the automatic gearbox must be
checked at a specialised workshop. Automatic gearbox overheating
The automatic

gearbox can overheat with a
prolonged start up, or when stopping and
starting continuously. This overheating is dis-
played with a warning lamp  in the instru-
ment panel. Additionally, an audible warning
can be heard. Stop and let the gearbox cool
››› .
The v
ehic

le moves forward or back despite
having selected a gear range
When the vehicle does not move in the re-
quired direction, the system may not have
the gear range correctly engaged. Press the
brake pedal and engage the gear range
again. If the vehicle still does not move in the
required direction, there is a system malfunc-
tion. Seek specialist assistance and have the
system checked. CAUTION
● When the ge arbo

x is displayed as overheat-
ing for the first time, the vehicle must be
parked safely or must be driven at a speed of
more than 20 km/h (12 mph).
● When the warning lamp lights up and the
audible w
arning is heard, the vehicle must be
parked safely and the engine switched off.
Let the gearbox cool down.
● To prevent damage to the gearbox, driving
must
only be continued when the warning
lamps are no longer lit up. While the gearbox is overheated, starting up and driving, even
at a s
lo

w speed should be avoided. Recommended gear display
In some vehicles, the recommended gear for
reduc
in

g fuel consumption is displayed on
the instrument panel:
DisplayMeaning 
Optimum gear.

Recommendation to change up a gear.

Recommendation to change down a
gear.
WARNING
The recommended gear display is intended as
a guideline only; it shou

ld never replace the
driver's attention to driving carefully.
● Responsibility for selecting the correct gear
for eac
h situation continues to lie with the
driver, for example when overtaking or climb-
ing a hill. For the sake of the environment
Selecting the most appropriate gear for the
sit uation w

ill help you to save fuel.146

Driving
Note
The recommended gear display is switched
off when the c lut
ch pedal is pressed.Steering
Introduction The power steering* is not hydraulic but elec-
tromec
h

anical. The advantage of this steer-
ing system is that it disposes of hydraulic
tubes, hydraulic oil, the pump, filter and oth-
er components. The electromechanical sys-
tem saves fuel. While a hydraulic system re-
quires oil pressure to be maintained, electro-
mechanical steering only requires energy
when the steering wheel is turned.
With the power steering system, the assisted
steering function automatically adjusts ac-
cording to the vehicle speed, the steering tor-
que and the wheel turning angle. The power
steering only works when the engine is run-
ning. WARNING
If the power steering is not working then the
st eerin

g wheel is much more difficult to turn
and the vehicle more difficult to control.
● The power steering only works when the
engine is
running. ●
Never a l

low the vehicle to move when the
engine is switched off.
● Never remove the key from the ignition if
the vehic
le is in motion. The steering may
lock and it will not be possible to turn the
steering wheel. Control and warning lamps

It lights up red
Power steer-
ing faulty.The steering system should be checked
by a specialised workshop as soon as
possible. 
It lights up yellow
Power steer-
ing opera-
tion re-
duced.
The steering system should be checked
by a specialised workshop as soon as
possible.
If, after restarting the engine and driv-
ing for a short distance, the yellow
warning lamp no longer comes on, it will
not be necessary to take the vehicle to a
specialised workshop. 
Flashes red
Fault in the
steering col-
umn elec-
tronic lock.
 Do not drive on!
Seek professional advice. 
It flashes yellow
Steering col-
umn devia-
tion.Gently turn the steering wheel to and
fro.
Steering
wheel not
unlocked or
locked.
Remove the key from the ignition and
then switch the ignition back on. If nec-
essary, check the messages displayed
on the instrument panel display.
Do not drive on, if
the steering column
remains locked after the ignition has
been switched on. Seek specialist assis-
tance. Several warning and control lamps light up
f
or a f
ew sec

onds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds. WARNING
If the warning lamps are ignored, the vehicle
ma y

stall in traffic, or may cause accidents
and severe injuries.
● Never ignore the warning lamps.
● Stop the vehicle safely as soon as possible. CAUTION
Failure to heed the warning lamps when they
appe ar m

ay result in faults in the vehicle. 147
Technical data
Advice
Operation
Emergencies
Safety

Operation
Information on the steering To prevent theft, we recommend you lock the
st
eerin
g before leaving the vehicle.
Steering column mechanical lock
Lock the steering column by removing the
key from the ignition when the vehicle is
stopped.
Please engage steer-
ing lockUnlocking the steering
Parking the vehicle
››› page 135.Insert the key in the igni-
tion lock.
Remove the key from the
ignition.Turn the steering wheel
slightly to release the
steering lock.
Turn the steering wheel
slightly until you hear the
steering lock.Hold the steering wheel in
this position and switch
on the ignition. Electromechanical power steering
W
ith the po
w

er steering system, the assisted
steering function automatically adjusts ac-
cording to the vehicle speed, the steering tor-
que and the wheel turning angle. The power
steering only works when the engine is run-
ning.
You should remember that you will need con-
siderably more power than normal to steer
the vehicle if the power steering is not work-
ing correctly or not at all. Run-in and economical driving
Runnin
g in Please observe the instructions for running-in
new components.
R u

nning-in the engine
The engine needs to be run in over the first
1,500 km. During its first few hours of run-
ning, the internal friction in the engine is
greater than later on when all the moving
parts have bedded down.
How the vehicle is driven for the first 1,500
km influences the future engine perform-
ance. Throughout the life of the vehicle, it
should be driven at a moderate speed, espe-
cially when the engine is cold, as this will re-
duce engine wear and increase its useful life.
Never drive at extremely low engine speeds.
Change down to a lower gear when the en-
gine no longer runs “smoothly”. Up to 1,000
kilometres the following instructions apply:
● Do not use full throttle.
● Do not force the engine above two thirds of
its m ax

imum speed.
Between 1,000 and 1,500 kilometres, gradu-
ally increase power until reaching the maxi-
mum speed and high engine speeds. Running in new tyres and brake pads
●
Replacement of wheel rims and new tyres
›››
page 200
● Notes on the brakes ›››
page 135 For the sake of the environment
If the engine is run in gently, the life of the
engine w i

ll be increased and the engine oil
consumption reduced. Environmental compatibility
Environmental protection is a top priority in
the de
s
ign, c

hoice of materials and manufac-
ture of your new SEAT.
Constructive measures to encourage recy-
cling
● Joints and connections designed for easy
dismantlin
g.
● Modular construction to facilitate disman-
tling.
● Incr

eased use of single-grade materials.
● Plastic parts and elastomers are marked in
accor
dance with ISO 1043, ISO 11469 and
ISO 1629.
Choice of materials
● Use of recycled materials.
148

Driving
● Use of
c
ompatible plastics in the same part
if its components are not easily separated.
● Use of recycled materials and/or materials
originating fr
om renewable sources.
● Reduction of volatile components, includ-
ing odour, in p
lastic materials.
● Use of CFC-free coolants.
Ban on heavy
metals, with the exceptions
dictated by law (Annex II of ELV Directive
2000/53/EC): cadmium, lead, mercury, hexa-
valent chromium.
Manufacturing methods
● Reduction of the quantity of thinner in the
protectiv
e wax for cavities.
● Use of plastic film as protection during ve-
hicle tr
ansport.
● Use of solvent-free adhesives.
● Use of CFC-free coolants in cooling sys-
tems.
● Recy

cling and energy recovery from resi-
dues (RDF).
● Impr

ovement in the quality of waste water.
● Use of systems for the recovery of residual
heat (therm
al recovery, enthalpy wheels,
etc.).
● The use of water-soluble paints. Economical and environmentally
friendly drivin

g Fig. 150
Fuel consumption in litres per
100 km at 2 diff
er

ent outside temperatures Fuel consumption, environmental impact and
en
gine, br
ak

e and tyre wear depend largely
on three factors:
● Personal driving style.
● Conditions of use (weather, road surface).
● Technical requirements.
Saving
s of up to 25% in fuel consumption
are possible with an appropriate driving style
and the adoption of certain simple tips.
Changing gear early
General instructions: The highest gear is al-
ways the most economical. As a guide, for
most vehicles at a speed of 30 km/h
(19 mph), drive in third gear, at 40 km/h (25 mph) in fourth gear and at 50 km/h
(31 mph) in fifth ge

ar.
In addition, “skipping” gears when shifting
up helps to save fuel, weather and traffic
conditions permitting.
Do not wait until the last moment before
changing gear. Only use first gear when you
move off and change to second gear quickly.
Avoid the kick-down function in vehicles with
automatic gearbox.
Vehicles with a gear display help to achieve
an economical driving style as the display in-
dicates the best moment to change gear.
Let the vehicle roll
If you take your foot off the accelerator, the
fuel supply is stopped and consumption is
reduced.
Allow the vehicle to roll without accelerating,
for example when approaching a red traffic
light. However, if the vehicle is rolling too
slowly or the distance is too long, the clutch
pedal should be pressed to declutch. The en-
gine will then operate at idle speed.
If the vehicle is going to be at a standstill for
a period of time, switch off the engine; for ex-
ample, while waiting at a level crossing.
Think ahead and “flow” with the traffic
Frequent acceleration and braking considera-
bly increase fuel consumption. If you think »
149
Technical data
Advice
Operation
Emergencies
Safety

Operation
ahead as you drive and keep a safe distance
fr om the
v
ehicle in front, it is possible to slow
down by simply lifting your foot off the accel-
erator. This eliminates the need for constant
braking and acceleration.
Calm and steady driving
Constancy is more important than speed: The
more you drive at a constant speed, the lower
the fuel consumption.
When driving on the motorway, it is more effi-
cient to drive at a constant and more moder-
ate speed than to be continuously accelerat-
ing and braking. As a general rule, you will
reach your destination just as quickly when
you drive at a constant speed.
The cruise control function helps you to ach-
ieve a constant style of driving.
Moderate use of additional devices
It is important to travel in comfort, but con-
venience systems should be used ecological-
ly.
Some equipment, when connected, increase
fuel consumption considerably, for example:
● Air conditioning cooling system: If the air
conditioning sy
stem is required to cool to
significantly lower temperatures than the true
outside temperature, it will require a large
amount of energy from the engine. Therefore,
we recommend that the selected temperature for the vehicle is not too different to the out-
side temper

ature. It is a good idea to air the
vehicle before starting your journey and to
drive a short distance with the windows
open. Then you can close the windows and
switch on the air conditioning. Keep windows
closed when travelling at high speeds. Driv-
ing with the windows open increases fuel
consumption.
● Switch off the seat heating when the seats
have w
armed up.
● Switch off the heated rear window when it
is not
moist or covered in ice.
Avoid short journeys
Fuel consumption is much higher when the
engine is cold, immediately after it has been
started. It takes a few kilometres of driving
for the engine to warm up and to normalise
consumption.
The engine and catalytic converter need to
reach their proper working temperature in or-
der to minimise fuel consumption and emis-
sions. The ambient temperature has a deci-
sive influence.
Fig. 150 shows the difference in consump-
tion for the same journey at +20°C (+68°F)
and at -10°C (+14°F).
Therefore, unnecessary short journeys
should be avoided. Try to combine trips. The vehicle uses more fuel in winter than in
summer, ev

en when other conditions are the
same.
The engine takes a long time to warm up
when it is idling. In addition, mechanical
wear and pollutant emissions are also espe-
cially high during this initial warm-up phase.
It is therefore best to drive off immediately af-
ter starting the engine. Doing this avoids run-
ning the engine at a high speed.
Adjusting type pressures.
Having the correct pressure in your tyres
helps to reduce rolling resistance and, as a
result reduces fuel consumption. Increasing
the tyre pressure slightly (+0.2
bar/+3 psi/+200 kPa) can help to save fuel.
When you buy new tyres, make sure they are
optimised for minimum rolling resistance.
Use low friction engine oil
The use of low viscosity totally synthetic oils,
known as low friction engine oil, helps to re-
duce fuel consumption. These oils reduce the
resistance caused by friction in the engine,
they flow around the engine more quickly
and efficiently, particularly in cold starts. The
effect is particularly noticeable in vehicles
frequently used for short journeys.
Always check the engine oil level and ob-
serve service intervals (engine oil change in-
tervals).
150

Driving
When purchasing engine oil, always observe
l e
g
al requirements and ensure that the oil is
approved by SEAT.
Avoid carrying unnecessary loads
The lighter the vehicle, the more economical
and ecological the driving style. For example,
an additional weight of 100 kg will increase
fuel consumption up to 0.3 l/100 km.
Remove any unnecessary objects or loads
from the vehicle.
Remove optional equipment and unnecessa-
ry accessories
The more aerodynamic the vehicle, the lower
the fuel consumption. Optional equipment
and accessories (such as roof racks or bike
carriers) reduce the aerodynamic benefits of
the vehicle.
Therefore, we recommend you remove all op-
tional and unnecessary equipment and racks,
especially if you intend to drive at high
speeds.
Other factors which increase fuel consump-
tion (examples):
● Fault in engine management.
● Driving on hills. WARNING
Always adapt your speed and the distance to
the v ehic

les ahead in line with visibility,
weather conditions, the condition of the road
and the traffic situation. Engine management and ex-
hau
s

t gas purification system
Introduction WARNING
The components of the exhaust system reach
ver y

high temperatures. This could cause a
fire.
● Always park your vehicle so that no part of
the exhau
st system can come in contact with
flammable materials (such as dried grass).
● Never apply additional underseal or anti-
corro
sion coatings to the exhaust pipes, cata-
lytic converter or the heat shields on the ex-
haust system. Control and warning lamps

It lights up
fault in the pet-
rol engine man-
agement.Take the vehicle to a specialised
workshop as soon as possible and
have the engine checked. 
It lights up
Fault in the
emission control
system.Reduce speed and drive carefully to
the nearest specialised workshop to
have the engine checked.

Flashes
Combustion
fault which could
damage the cat-
alytic converter.Reduce speed and drive carefully to
the nearest specialised workshop to
have the engine checked.
Several warning and control lamps light up
f
or a f
ew sec

onds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds. CAUTION
Always pay attention to any lit control lamps
and to the c orr

esponding descriptions and in-
structions to avoid damage to the vehicle. Note
While the  or  c
ontrol lamps remain lit,
the engine may have faults, there will be
higher fuel consumption and a possible loss
of engine power. 151
Technical data
Advice
Operation
Emergencies
Safety

Driver assistance systems
Zones explored
B ehind the
v
ehicle ››› Fig. 152 C , the zone
an aly
sed r

eaches a distance of up to 150 cm
and around 60 cm to the sides.
Screen display
The image displayed represents the super-
vised zones in several segments. As the vehi-
cle moves closer to an obstacle, the segment
moves closer to the vehicle displayed A or
B . When the penultimate segment is dis-
p l
a

yed, this means that the vehicle has
reached the collision zone. Stop the vehicle!
Distance from
the vehicle to
the obstacleAudible
warning
Displayed in col-
our on the screen: colour of the seg-ment if an obsta-cle is recognised
behind:
approx. 31-150
cmbeeping soundYellow
behind:
approx. 0-30 cmperma- nent
soundRed WARNING
Do not be distracted from traffic to look at the
sc r

een. Note
● SEA T r

ecommends practising using the
parking distance warning system in a traffic-
free zone or in a car park to familiarise your-
self with the system and its operation.
● The display on the radio screen of the area
explor
ed by the sensors may take up to 5 sec-
onds. Cruise control* (Cruise control
sys
t

em - CCS)
Control lamp
It lights upPossible cause 
This cruise control system maintains the
set speed of the vehicle.
Several warning and control lamps light up
f
or a f
ew sec

onds when the ignition is switch-
ed on, signalling that the function is being
verified. They will switch off after a few sec-
onds. WARNING
If the warning lamps are ignored, the vehicle
ma y

stall in traffic, or may cause accidents
and severe injuries.
● Never ignore the warning lamps. CAUTION
Failure to heed the warning lamps when they
appe ar m

ay result in faults in the vehicle. Cruise control operation
Read the additional information carefully
›› ›

 page 24
The cruise control system (CCS) is able to in-
dividually maintain the set speed when driv-
ing forwards from approx. 20 km/h (15 mph).
The CCS only slows down by reducing the ac-
celerator but not by braking ››› .
T r
av

elling down hills with the CCS
When travelling down hills the CCS cannot
maintain a constant speed. Slow the vehicle
down using the brake pedal and reduce
gears if required.
Automatic off
The cruise control system (CCS) is switched
off automatically or temporarily:
● If the system detects a fault that could af-
fect the w
orking order of the CCS.
● If you increase the stored speed by press-
ing the acc
elerator pedal for a certain time.
● If the brake pedal is pressed. »
155
Technical data
Advice
Operation
Emergencies
Safety

Driver assistance systems
●
Any r
eparation of the laser sensor requires
specialist knowledge. SEAT recommends tak-
ing your car in for technical service. Note
● If the C ity

Safety Assist function activates a
brake, the brake pedal range is reduced. This
makes the brake pedal seem “harder”.
● Automatic brake intervention by the City
Safety As
sist function can be cancelled by
pressing the clutch pedal, the accelerator
pedal or by a corrective intervention.
● During automatic braking by the City Safety
Assi
st function you may hear unusual noises.
This is normal and is produced in the brake
system. Warning and control lamp
The City Safety Assist function is switched on
ev
er
y

time the ignition is switched on. No
special indication is produced.
If the City Safety Assist function is switched
off or on, or if there is an error in the system,
it will be shown by a control lamp on the in-
strument panel display. 

It lights up
The City Safety Assist
function has been
switched on manual-
ly using the
 button ››› Fig. 155.
The control lamp turns off after
about 5 seconds. 
Flashes
Fast: The City Safety
Assist system func-
tion brakes automat-
ically or has braked
automatically.
Control lamp turns off automati-
cally.
Slow: City Safety As-
sist function is not
currently available.
If the vehicle is stopped, switch
off the engine and switch it on
again. If necessary, inspect the
laser sensor (dirt, frost)
›››
in
Laser sensor on page 158. If it
still does not function, refer to a
Specialised workshop to have
the system inspected.  
Flashes
Within the operating
area of 5-30 km/h
(3-19 mph): the City
Safety Assist func-
tion has been
switched off manual-
ly using the
 button
››› Fig. 155.
Switch on the City Safety Assist
function manually using the
  button ››› Fig. 155. Several warning and control lamps should
light
up f
or a f

ew seconds when the ignition is switched on, signalling that the function is
being v

erified. They will switch off after a few
seconds. WARNING
If the warning lamps are ignored, the vehicle
ma y

stall in traffic, or may cause accidents
and severe injuries.
● Never ignore the warning lamps.
● Stop the vehicle safely as soon as possible. CAUTION
Failure to heed the warning lamps when they
appe ar m

ay result in faults in the vehicle. 157
Technical data
Advice
Operation
Emergencies
Safety

Operation
Laser sensor Fig. 153
In the windscreen: laser sensor for
the C ity

Safety Assist function. Fig. 154
Laser sensor detection area. A laser sensor on the windscreen
››
›
Fig. 153
allows the system to detect driving situations
in front of the vehicle.
Vehicles ahead can be detected up to a dis-
tance of about 10 m. WARNING
The laser beam on the sensor can produce se-
rious injurie

s to the eyes.
● Never focus optical devices, e.g. a camera,
a micro
scope or a magnifying glass closer
than 100 mm from the laser sensor.
● Note that the laser beam can stay active
when the City
Safety Assist system is switch-
ed off or unavailable. The laser beam is not
visible to the human eye. CAUTION
If the windscreen is dirty or frosted in the
are a of

the laser sensor, e.g. due to rain, mist
or snow, the City Safety Assist system may
fail to operate as a result.
● Always keep the laser sensor area free of
dirt and ic
e.
● Use a small brush to remove snow and a
de-icer spr
ay to remove ice. CAUTION
A damaged windscreen in the laser sensor
are a m

ay cause the City Safety Assist func-
tion to stop working.
● Replace the windscreen if it is scratched,
crac
ked or chipped by stones in the laser sen-
sor area. Only use a windscreen authorised
by SEAT. Carrying out repairs is not permitted
(e.g. in the case of damage suffered in an im-
pact from a stone). ●
When rep l

acing the windscreen wipers, on-
ly use windscreen wipers authorised by SEAT.
● Do not paint the laser sensor area on the
winds
creen or cover it with adhesives or oth-
er materials. Function
Fig. 155
In the lower part of the centre con-
so l
e: B

utton for the City Safety Assist func-
tion. Switching on and off the City Safety Assist
f
u
nction
● Pr

ess the ››› Fig. 155
button on the centre
console.
When the City Safety Assist function is
switched on, the control lamp   lights up
on the dash panel within the operational
range, i.e. for speeds between 5-30 km/h
(3-19 mph).
158

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