engine Seat Mii 2013 Service Manual

148Starting, changing gears, parking
Several warning and control lamps should light up for a few seconds when
the ignition is switched on, signalling that the function is being verified.
They will switch off after a few seconds.
WARNING
If the warning lamps are ignored, the vehicle may 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 appear may result in faults in
the vehicle. 
Information on the steering
To prevent theft, we recommend you lock the steering before leaving the ve-
hicle.
Mechanical steering lock
Lock the steering column by removing the key from the ignition when the
vehicle is stopped.
Please engage steering lockUnlocking the steeringParking the vehicle ⇒ page 134.Insert the key in the ignition 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 posi-
tion and switch on the ignition.
Electromechanical power steering
With the power steering system, the assisted steering function automatical-
ly adjusts according to the vehicle speed, the steering torque and the wheel
turning angle. The power steering only works when the engine is running.
You should remember that you will need considerably more power than nor-
mal to steer the vehicle if the power steering is not working correctly or not
at all. 

156Driver assistance systems
Note
If the City Safety Assist function activates a brake, the brake pedal range is
reduced. This makes the brake pedal seem “harder”.
Note
Automatic brake intervention by the City Safety Assist function can be can-
celled by pressing the clutch pedal, the accelerator pedal or by a corrective
intervention.
Note
During the automatic braking by the City Safety Assist function you may
hear unusual noises. This is normal and is produced in the brakes system. 
Warning and control lamps
The City Safety Assist function is switched on every time the ignition is
switched on. No special indication is produced.
If the City Safety Assist function is switched off, functions or there is an error
in the system, this will be shown by a control lamp on the instrument panel
display.
lights upPossible cause ⇒ Solution
 
The City Safety Assist func-
tion has been switched on
manually using the button  
⇒ Fig. 101.
The control lamp turns off after
about 5 seconds.
flashesPossible cause ⇒ Solution

fast: The City Safety Assist
system function brakes auto-
matically or has braked auto-
matically.Control lamp turns off automati-
cally.
slow: City Safety Assist func-
tion 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, frozen) ⇒ 
in Laser sensor on page 157. If
it still does not function, refer to
a Specialised workshop to have
the system inspected.


within the operating area of
5-30– km/h (3-19 mph): The
City Safety Assist function
has been switched off man-
ually using the button  
⇒ 
Fig. 101.
Switch on the City Safety Assist
function manually using the but-
ton  
⇒ Fig. 101.
Several warning and control lamps should light up for a few seconds when
the ignition is switched on, signalling that the function is being verified.
They will switch off after a few seconds.
WARNING
If the warning lamps are ignored, the vehicle may 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 appear may result in faults in
the vehicle. 

160Driver assistance systems
Malfunction in the laser sensor
If the laser sensor operation is impaired, for example due to heavy rain,
spray, snow or dirt, the City Safety Assist system function is temporarily
switched off. On the instrument panel display the control lamp  flashes.
When the fault in the laser sensor has been rectified, the City Safety Assist
system function automatically becomes available. 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 City Safety Assist system is switched off or there is a fault
⇒ page 156.
● If the laser sensor is dirty, covered or overheated ⇒ page 157.
● In the event of snow, heavy rain or dense fog.
● If there are vehicles in front.
● Vehicles changing lanes.
● Vehicles moving in the opposite direction in the same lane.
● Very dirty vehicles with a low degree of reflection.
● Presence of thick dust. 
Hill hold
Introduction
Additional information and warnings:
● SEAT information system ⇒ page 22
● Braking, stopping and parking ⇒ page 134 ●
Vehicle battery ⇒ page 193
● Wheels and tyres ⇒ page 210
● Accessories, parts replacement, repairs and modifications ⇒ page 222
● Jump starting ⇒ page 275
WARNING
The smart technology included in the hill hold cannot change the laws of
physics. Do not let the extra convenience afforded by the hill hold tempt
you into taking any risks when driving.
● Any accidental movement of the vehicle could result in serious injury.
● The hill hold is not a replacement for driver awareness.
● Adjust your speed and driving style to visibility, weather, road and
traffic conditions.
● The hill hold cannot always keep the vehicle at a standstill on a slope
or brake sufficiently when travelling downhill (e.g. on slippery or frozen
surfaces).

Warning lamps
lights upPossible causeSolution
The Start-Stop system is ena-
bled.

The Start-Stop system is ena-
bled but the engine cannot be
automatically stopped.Contact a specialised
workshop.

The Start-Stop system cannot
start the engine.Start the engine by hand
using the vehicle's key
⇒ page 120.
There is a fault in the alternator.⇒ page 193 

161
Driver assistance systems
flashesPossible causeSolution
The Start-Stop system is not
available.Contact a specialised
workshop.
Some warning and control lamps will light up briefly when the ignition is
switched on to check certain functions. They will switch off after a few sec-
onds.
WARNING
If the warning lamps are ignored when they light up, the vehicle may
stall in traffic and cause accidents and severe injuries.
● Never ignore the warning lamps.
● Stop the vehicle at the next opportunity.
CAUTION
Failure to heed the control lamps when they light up may result in damage
to the vehicle. Start-Stop system
Fig. 104 At the top of
the centre console: Start-
Stop system button
With the Start-Stop system enabled, the engine is automatically stopped
when the vehicle is at a standstill. It will start again automatically as re-
quired.
This function remains enabled while the ignition is switched on. The instru-
ment panel display 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 release the clutch
pedal. The engine will stop.
● To restart, simply engage the clutch. 
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162Driver assistance systems
Vehicles with an automatic gearbox
● When the vehicle is at a standstill, depress the brake or keep it pressed
down. The engine switches off.
● The engine will start again as soon as you release the brake pedal.
● With the selector lever set to position P, the engine will not start until a
range of gears is selected or the accelerator pedal is depressed.
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 temperature.
● The vehicle must have moved since the last time the engine was stop-
ped.
● The vehicle's battery must be sufficiently charged.
● The battery temperature must not be too low or too high.
● The vehicle must not be on a very steep slope.
Conditions for the engine to restart automatically
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 must be started by hand using the vehicle's key in the following
cases:
● If the driver unbuckles his/her seat belt.
● If the driver door is opened.
● If the bonnet is opened. Switching the Start-Stop system on and off
●
Press the button  situated in the centre console ⇒ Fig. 104.
● The button will light up when the Start-Stop system is switched off.
The engine will start immediately if the vehicle is in Stop mode when the
system is switched off by hand.
WARNING
The brake servo and the electromechanical steering do not work when
the engine is switched off.
● The vehicle must never be allowed to move with the engine switched
off.
● Disconnect the Start-Stop system before working in the engine com-
partment.
CAUTION
The vehicle's battery could be damaged if the vehicle is used for long peri-
ods at very high outside temperatures.
Note
In some cases, it may be necessary to start the engine by hand using the
key. Refer to the corresponding control lamp on the instrument panel. 
Hill driving assistant*
This function is only included in vehicles with ESC. The hill driving assistant helps the driver to move off and upwards on a hill
when the vehicle is stationary. 

163
Driver assistance systems
The system maintains brake pressure for approximately two seconds after
the driver takes his foot off the brake pedal to prevent the vehicle from
lurching backwards when it is started. During these two seconds, the driver
has enough time to release the clutch pedal and accelerate without 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,
● closed doors,
● vehicle completely stationary,
● engine running and foot on the brake,
● besides having a gear engaged or being in neutral for manual gear
change and with the selector lever at positions S, D or R in vehicles with au-
tomatic gearbox.
This system is also active in reversing uphill.
WARNING
● If you do not start the vehicle immediately after taking your foot off
the brake pedal, the vehicle may start to roll back under certain condi-
tions. Depress the brake pedal or use the hand brake immediately.
● If the engine stalls, depress the brake pedal or use the hand brake
immediately.
● When following a line of traffic uphill, if you want to prevent the vehi-
cle 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 tell you if your vehicle is
equipped with this system. 
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164Air conditioning
Air conditioning
Heating, Ventilation and Air conditioning
system
Introduction
Dust and pollen filter
The dust and pollen filter with its activated charcoal cartridge serves as a
barrier against impurities in the interior ambient air.
For the air conditioner to work with maximum efficiency, the dust and pollen
filter must be replaced at the intervals specified in the Maintenance Pro-
gramme.
If the filter loses efficiency prematurely due to use in areas with very high
levels of air pollution, the filter must be changed more frequently than sta-
ted in the Service Schedule.
Additional information and warnings:
● SEAT information system ⇒ page 22
● Windscreen wash system ⇒ page 89
● Caring for and cleaning the vehicle exterior ⇒ page 197
WARNING
Reduced visibility through the windows increases the risk of serious acci-
dents.
● Ensure that all windows are free of ice and snow and that they are not
fogged up preventing a clear view of everything outside.
WARNING (Continued)
● The maximum heat output required to defrost windows as quickly as
possible is only available when the engine has reached its normal run-
ning temperature. Only drive when you have good visibility.
● Always ensure that you use the heating system, ventilation, air condi-
tioner and the heated rear window to maintain good visibility.
● Never leave the air recirculation on for a long period of time. If the
cooling system is switched off and air recirculation mode switched on,
the windows can mist over very quickly, considerably limiting visibility.
● Switch air recirculation mode off when it is not required.
WARNING
Stuffy or used air will increase fatigue and reduce driver concentration
possibly resulting in a serious accident.
● Never leave the fresh air fan turned off or use the air recirculation for
long periods of time; the air in the vehicle interior will not be refreshed.
CAUTION
● Switch the air conditioner off if you think it may be broken. This will
avoid additional damage. Have the air conditioner checked by a specialised
workshop.
● Repairs to the air conditioner require specialist knowledge and special
tools. SEAT recommends visiting a Technical Service. 

165
Air conditioning
Note
When the cooling system is turned off, air coming from the outside will not
be dried. To avoid fogging up the windows, SEAT recommends leaving the
cooler (compressor) on. To do this, press the AC
button. The button lamp
should light up.
Note
The maximum heat output required to defrost windows as quickly as possi-
ble is only available when the engine has reached its normal running tem-
perature.
Note
Keep the air intake slots in front of the windscreen free of snow, ice and
leaves to ensure heating and cooling are not impaired, and to prevent the
windows from misting over. 
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167
Air conditioning
Control
buttonAdditional information. Heating and ventilation system
⇒ Fig. 105 and air conditioning system ⇒ Fig. 106.
1 ... 
Temperature.
Rotate the control to adjust the temperature accordingly.
2
 ...

Air fan.
setting 0: Air fan and air conditioning system switched off, set-
ting 4: Air fan maximum setting.
3Air distribution.
Rotate the continuous control to direct the airflow to the desired
area.

Heating and ventilation system: defrost function. Distribution of
air to the windscreen and the side windows in the exterior rear
vision mirror area.
Air conditioning system: defrost function. Distribution of air to
the windscreen and the side windows in the exterior rear vision
mirror area. Press the AC
button, increase the air fan speed and
switch on the air recirculation ⇒  page 169 to clear the wind-
screen of condensation as soon as possible.
Air distribution towards the body.
Air distribution towards the footwell.
Air distribution towards the windscreen and the footwell.
Air conditioner: press the button to turn off/on the cooling sys-
tem ⇒ page 167.
4
Air conditioner: sliding control for air recirculation ⇒ page 169.
Switch off
Turn the air fan switch 2 to position 0.
Heated rear window
The heated rear window button  is located on the centre console. The
heated rear window only works when the engine is running and switches off
automatically after a maximum of 10 minutes.
WARNING
Never turn off the air fan for a long time or the air in the vehicle interior
will not be refreshed.
● Stuffy or used air will increase fatigue and reduce driver and passen-
ger concentration possibly resulting in a serious accident.

Heating and ventilation system user instructions
Temperature
The desired temperature for the interior cannot be lower than that of the ex-
terior air temperature, as the heating and fresh air system cannot cool or de-
humidify the air.
Setting for conditions of optimal visibility
● Set the fan ⇒ Fig. 105 2
to setting 1 or 2.
● Turn the temperature control ⇒ Fig. 105 1 to the centre position.
● Open and direct the air outlets in the dash panel ⇒ page 169.
● Turn the air distribution control ⇒ Fig. 105 3
to the required position. 
User instructions for the air conditioner*
The interior cooling system only works when the engine is running and fan
is switched on. 
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168Air conditioning
The air conditioning operates most effectively with the windows closed.
However, if the vehicle has heated up after standing in the sun for some
time, the air inside can be cooled more quickly by opening the windows
briefly.
Setting for conditions of optimal visibility
When the air conditioning is switched on, the temperature and the air hu-
midity in the vehicle interior drop. Hence, when the outside air humidity is
high, the windows do not mist over and comfort for the vehicle occupants is
improved:
● Disable air recirculation mode ⇒ page 169.
● Set the fan to the required setting.
● Turn the temperature control to the centre position.
● Open and direct the air outlets in the dash panel ⇒ page 169.
● Turn the air distribution control to the defrost position.
● Press the AC
button to turn on cooling. The button will light up.
The cooling system does not switch on
If the air conditioning system cannot be switched on, this may be caused by
the following: ●
The engine is not running.
● The fan is switched off.
● The air conditioner fuse has blown.
● The outside temperature is lower than approximately +2 °C (+36 °F).
● The air conditioner compressor has been temporarily switched off be-
cause the engine coolant temperature is too high.
● Another fault in the vehicle. Have the air conditioner checked by a speci-
alised workshop.
Things to note
If the humidity and temperature outside the vehicle are high, condensation
can drip off the evaporator in the cooling system and form a pool under-
neath the vehicle. This is normal and does not indicate a leak!Note
After starting it, any residual humidity in the air conditioner could mist over
the windscreen. Switch on the defrost function as soon as possible to clear
the windscreen of condensation. 