2015 SKODA OCTAVIA heating

Preheating fuel
The vehicle is fitted with a fuel filter preheating system. This secures opera-
tion of a vehicle using diesel fuel down to an environmental temperature of
-24 °C.
Diesel fuel additives
The diesel fuel in accordance with the prescribed standards meets all the con-
ditions for a smooth running engine. We therefore recommend that no diesel
fuel additives are used. This can result in considerable damage to parts of the
engine or the exhaust system.
CAUTION
■ Just filling the tank once with diesel fuel that does not comply with the
standard, can cause severe damage to parts of the engine, the fuel and ex-
haust system.■
If a different fuel other than diesel fuel, which complies to the above men-
tioned standards (e.g. petrol) is used, do not start the engine or switch on the
ignition! Extensive damage to engine parts can occur.
■
Water which has collected in the fuel filter can cause engine faults.
CAUTION
■ The vehicle cannot be operated with bio fuel RME, therefore this fuel must
not be filled in the tank and used for driving the vehicle. The use of biofuel
RME can cause considerable damage to parts of the engine or fuel system.■
Do not mix any fuel additives, so-called “flow improvers” (petrol and similar
agents) into the diesel. This can result in considerable damage to parts of the
engine or the exhaust system.
Refuelling with CNG (compressed natural gas)
Fig. 201
Natural gas filler tubes
Read and observe and on page 189 first.
Natural gas refuelling can be carried out if the following conditions are met.
The vehicle is unlocked.
The engine and the ignition are switched off.
The auxiliary heating and ventilation is switched off » page 118.
The gas filler tube for refuelling with natural gas is located behind the fuel fill-
er flap next to the petrol filler tube.
The filling couplings of the natural gas refuelling systems may differ in han-
dling. When refuelling with natural gas at unfamiliar refuelling systems, you
should seek help from trained fuel station staff. If unsure, have the refuelling
done by trained fuel station staff.
Open fuel filler flap
›
Open the fuel filler flap.
›
Remove cap
A
» Fig. 201 from gas filler tube
B
in direction of the arrow.
›
Plug the filling coupling of the refuelling system on the gas filler tube
B
.
The fuel tank is full when the compressor of the refuelling system automati-
cally switches off. To stop the refuelling operation prematurely, press the
“Stop ” button of the refuelling system.
Closing the filler cap
›
Check that sealing ring
C
» Fig. 201 has remained inserted in the gas filler
tube.
If sealing ring
C
has slipped onto the filling coupling, reinsert it into the gas
filler tube.
›
Plug the cap
A
onto the gas filler tube.
›
Close the bonnet.
The natural gas refuelling systems have an overfill protection relating to the
outdoor temperature. At very high outside temperatures, it may happen that
the gas tank may not be fully refuelled.
The natural gas system of your vehicle is suitable both for “slow fuelling” (fuel-
ling from small compressors) and for “quick fuelling” (fuelling from natural gas
stations with large compressors).
If the vehicle is parked for a longer period of time immediately after refuelling,
the situation may arise in which the pointer of the fuel tank gauge does not
indicate exactly the same level as was the case immediately after refuelling 

192General Maintenance

when the engine is restarted. This is not due to any system leakages but a
drop in pressure in the natural gas fuel tank due to technical reasons after a
cooling phase directly after refuelling.
The maximum lifetime of the gas tank is 20 years.
The capacity of the natural gas fuel tank is approximately 15 kg.
The capacity of the gasoline fuel tank is about 50 litres, of which about 6
lighters are in reserve.WARNING■
When refuelling, never get into the vehicle. If you have to get into your
vehicle in exceptional cases, touch a metal surface before you touch the
filling coupling again. This will avoid electrostatic discharges, which may
generate sparks. Sparks can cause a fire during refuelling.■
Natural gas is highly explosive and highly flammable.
Note
During the filling process sounds are heard which are harmless. If you are un-
sure which service station staff to use, ask the petrol station staff.
CNG
Fig. 202
Position of the CNG label(s).
Read and observe
and on page 189 first.
A G-TEC-vehicle may be operated with CNG and petrol.
In some countries, national legislation requires that vehicles with CNG opera-
tion be identified by one of the labels » Fig. 202.
Position of the CNG label » Fig. 202.
Natural gas quality and consumption
Depending on the natural gas supplier, the natural gas quality (heating value) may vary. The engine system adjusts automatically to the natural gas quality.
Automatically switching over from natural gas mode to petrol mode
The vehicle automatically switches from natural gas to petrol, for example, if
one of the following cases occurs. ▶ With an empty gas tank or not enough pressure in the tank.
▶ After refuelling with natural gas.
▶ At very low surrounding temperatures.
Use all the petrol in the fuel tank at lease once every six months until the
warning light 
illuminates and then refill with petrol. This is to ensure that
the fuel system functions correctly and to preserve the quality of the fuel.
Gas leak
If a gas leak is suspected (noticeable odour), proceed as follows. ▶ Stop the vehicle.
▶ Switch off the ignition.
▶ Put out any cigarettes, remove any spark-producing or incendiary items from
the vehicle and immediately switch the engine off.
▶ Open the doors and the boot lid to ventilate the vehicle sufficiently.
▶ Do not continue to drive if the odour persists.
▶ If it is not possible to leave an enclosed area with a vehicle with a gas leak
(e.g. in a tunnel, underpass, garage, ferry, etc.), call the emergency services
immediately.
Seek help from a specialist garage to correct the gas system fault.
In a traffic accident
If a gas leak is suspected in a traffic accident, proceed as follows.
▶ Switch off the ignition.
▶ Put out any cigarettes, remove any spark-producing or incendiary items from
the vehicle and immediately switch the engine off.
▶ Have all the occupants get out.
▶ Prevent people walking past/standing in the immediate vicinity of the acci-
dent vehicle. We recommend standing at least 10 metres from the vehicle.
▶ Inform the emergency services that it is a natural gas vehicle.
Regular gas system checks
Regular gas system checks must be carried out in a specialist workshop on
natural gas-powered vehicles. The vehicle owner is responsible for ensuring
tests are conducted properly. 193Inspecting and replenishing

The coolant additive percentage in the coolant must be at least 40%.
The coolant additive may be increased to a maximum of 60%.
The correct mixing ratio of water and coolant additive is to be checked if nec-
essary by a specialist garage or is to be restored if necessary.
The description of the coolant is shown in the coolant expansion reservoir
» Fig. 207 on page 199 .WARNINGThe engine compartment of your car is a hazardous area. The following
warning instructions must be followed at all times when working in the en-
gine compartment » page 194.■
The coolant is harmful to health.
■
Avoid contact with the coolant.
■
Coolant vapours are harmful to health.
■
Never open the end cover of the coolant expansion reservoir while the
engine is still warm. The cooling system is pressurized!
■
When opening the end cover of the coolant expansion reservoir, cover it
with a cloth to protect your face, hands and arms from hot steam or hot
coolant.
■
If any coolant splashes into your eyes, immediately rinse out your eyes
with clear water and contact a doctor as soon as possible.
■
Always keep the coolant in the original container, safe from people who
are not completely independent, especially children - there is a danger of
poisoning!
■
If coolant is swallowed, consult a doctor immediately.
■
Never spill operating fluids over the hot engine - risk of fire.
CAUTION
■ If for some reason it is not possible to top up the coolant under the current
circumstances,  do not continue driving! Switch off the engine and seek as-
sistance from a specialist garage.■
If the expansion tank is empty, do not top up with coolant. The system could
aerate - risk of engine damage, 
do not continue driving! Switch off the en-
gine and seek assistance from a specialist garage.
■
The amount of coolant additive in the coolant must never be allowed to be
less than 40 %.
■
Over 60 % of coolant additive in the coolant reduces the antifreeze protec-
tion and coolant effectiveness.
■
A coolant additive that does not comply with the correct specification can
significantly reduce the corrosion protection of the cooling system.
■ Any faults resulting from corrosion may cause a loss of coolant and can con-
sequently result in major engine damage.■
Do not fill the coolant above the mark
A
» Fig. 207 on page 199 .
■
If an error occurs, leading to the engine overheating, the help of a professio-
nal garage is to be sought - there is a risk of serious engine damage occurring.
■
Additional headlights and other attached components in front of the air inlet
impair the cooling efficiency of the coolant.
■
Never cover the radiator - there is a risk of the engine overheating.
Note
On vehicles that are fitted with an auxiliary heater (auxiliary heating and venti-
lation), the coolant capacity is approx. 1 l larger.
Checking the coolant level
Fig. 207
Coolant expansion reservoir
Read and observe and on page 199 first.
The coolant expansion bottle is located in the engine compartment.
Coolant expansion reservoir » Fig. 207
Mark for the maximum permissible coolant level
Mark for the lowest permissible coolant level
The coolant level should be kept between the marks
A
and
B
.
The coolant can be checked and topped up, if the following conditions are sat-
isfied.
The vehicle is on a horizontal surface.
The engine is turned off.
The engine is not heated.
The bonnet is open. 
AB199Inspecting and replenishing

Winter time
The vehicle battery only has a proportion of the starting power in lower tem-
peratures. A discharged vehicle battery may already freeze at temperatures
just below 0 °C .
We therefore recommend that you have the battery checked and, if necessary,
recharged by a specialist garage before the start of the winter.
Note
The battery acid level is also checked regularly by a specialist garage as part of
the inspection service.
Charging
Read and observe
and on page 201 first.
A properly charged vehicle battery is essential for reliably starting the engine.A charging operation can be performed if the following conditions are satis-
fied.
The engine is turned off.
The ignition is switched off.
All consumers are turned off.
The bonnet is open.
“Fast charging” with high currents
›
Disconnect both battery cables (first of all “negative”, then “positive”).
›
Attach the terminal clamps of the charger to the battery terminals (red =
“positive”, black = “negative”).
›
Plug the mains cable of the charger into the power socket and switch on the
device.
›
After charging has been successful: Switch off the charger and remove the
mains cable from the power socket.
›
Only then disconnect the charger's terminal clamps.
›
Reconnect the cables to the battery (first of all “positive”, then “negative”).
Charging with low voltages
It is not necessary to disconnect the cables from the battery if you recharge
the vehicle battery, for example from a mini-charger.
Refer to the instructions of the charger manufacturer .
A charging current of 0.1 multiple of the total vehicle battery capacity (or low-
er) must be used until full charging is achieved.
The vent plugs of the vehicle battery should not be opened for charging.WARNING■ When you charge a battery, hydrogen is released, and a highly explosive
gas mixture is also produced. An explosion can be caused through sparkling
over during unclamping or loosening of the cable plug while the ignition is
on.■
Creating a bridge between the poles on the battery (e.g. with metal ob-
jects - cables) creates a short circuit - risk of damage to the battery, explo-
sion and burning of the battery, jets of acid spurting out.
■
Avoid creating sparks when working with cables and electrical devices.
Strong sparking represents a risk of injury.
■
Before carrying out any work on the electrical system, switch off the en-
gine, the ignition and all electrical components and disconnect the negative
terminal 
.
■
“Quick-charging” the vehicle battery is dangerous and requires a special
charger and specialist knowledge.
■
We therefore recommend that vehicle batteries be “rapidly charged” by a
specialist garage.
CAUTION
On vehicles with the START/STOP system or additional heating (auxiliary heat-
ing), do not connect the pole terminal of the charger directly to the negative
terminal of the vehicle battery, but rather only to the engine earth » page 219,
Jump-starting using the battery from another vehicle .
Replacing
Read and observe
and on page 201 first.
The new vehicle battery must have the same capacity, voltage, current and
size as the original battery. Suitable vehicle battery types can be purchased
from a specialist garage.
We recommend you have the battery replaced by a specialist garage.
Disconnecting and reconnecting
Read and observe
and on page 201 first.
Disconnecting
›
Switch off the ignition. 
203Inspecting and replenishing

WARNING■If the tyre cannot be inflated to at least. 2.0 bar, the damage is too great.
The sealing agent cannot be used to seal the tyre.  Do not drive the vehi-
cle. Seek help from a specialist garage.■
The tyre inflation hose and air compressor may get hot as the tyre is be-
ing inflated – risk of burning.
CAUTION
Switch off the air compressor after running 8 minutes at the latest – risk of
overheating! Allow the air compressor to cool a few minutes before switching
it on again.
Notes for driving with a repaired tyre
Read and observe
on page 217 first.
The inflation pressure of the repaired tyre must be checked after driving for 10
minutes.
If the tyre inflation pressure is 1.3 bar or less
›
 Do not drive the vehicle! You cannot properly seal with tyre with the
breakdown kit.
If the tyre inflation pressure is 1.3 bar or more
›
Set the tyre pressure back to the correct value.
›
Continue driving carefully to the nearest specialist garage at a maximum
speed of 80 km/h (50 mph).
WARNING■ A tyre filled with sealant has the same driving characteristics as a stand-
ard tyre.■
Do not drive faster than 80 km/h (50 mph).
■
Avoid accelerating at full throttle, sharp braking and fast cornering.
Jump-starting
 Introduction
This chapter contains information on the following subjects:
Jump-starting using the battery from another vehicle
219The battery of another vehicle can be used to jump-start your vehicle if the en-
gine will not start because the battery is flat.WARNING■ Pay attention to the warning instructions relating to working in the en-
gine compartment » page 194.■
A discharged vehicle battery may already freeze at temperatures just be-
low 0 °C. If the battery is frozen, do not carry out a jump start with the bat-
tery of another vehicle – risk of explosion!
■
Keep any sources of ignition (naked flame, smouldering cigarettes, etc.)
away from the battery – risk of explosion!
■
Never jump-start vehicle batteries with an electrolyte level that is too low
– risk of explosion and caustic burns.
■
The vent screws of the battery cells must be tightened firmly.
Note
We recommend you buy jump-start cables from a car battery specialist.
Jump-starting using the battery from another vehicle
Fig. 224
Jump-starting: A – flat battery, B
– battery providing current 
219Emergency equipment, and self-help

Remote control
Introduction
This chapter contains information on the following subjects:
Replacing the battery in the remote control key
223
Synchronising the remote control
223
replace battery in the remote control the auxiliary heating (auxiliary
heating)
223
CAUTION
■ We recommend having faulty rechargeable batteries replaced by a ŠKODA
service partner.■
Pay attention to the correct polarity when changing the battery.
Note
If a key has an affixed decorative cover, this will be destroyed when the bat-
tery is replaced. A replacement cover can be purchased from a ŠKODA Partner.
Replacing the battery in the remote control key
Fig. 230
Remove cover/take out battery
Read and observe
on page 223 first.
The battery change is carried out as follows.
›
Flip out the key.
›
Press off the battery cover
A
» Fig. 230 with your thumb or by using a flat
screwdriver in region
B
.
›
Open the battery in the direction of the arrow
1
.
›
Remove the discharged battery in the direction of arrow
2.› Insert the new battery.›Insert the battery cover A and press it down until it clicks audibly into place.
Synchronising the remote control
Read and observe
on page 223 first.
If the vehicle does not unlock when pressing the remote control, the key may
not be synchronised. This can occur when the buttons on the remote control
key are actuated a number of times outside of the operative range of the
equipment or the battery in the remote control key has been replaced.
Synchronise the key as follows.
›
Press any button on the remote control key.
›
Unlock the door with the key via the lock cylinder within 1 minute of pressing
the button.
replace battery in the remote control the auxiliary heating
(auxiliary heating)
Fig. 231
Radio remote control: Battery
cover
Read and observe on page 223 first.
The battery is located under a cover on the back of the radio remote control
» Fig. 231 .
›
Insert a flat, blunt object, such as a coin, into the gap of the battery cover.
›
Turn the cover against the direction of the arrow up to the mark to open the
cover.
›
Replace the battery.
›
Return the battery cover.
›
Turn the cover in the direction of the arrow up to the initial marking, engage.
223Emergency equipment, and self-help

›Insert a new fuse.›Replace the bracket at the original position.
Installing the storage compartment›
Move the stop buffer
B
of the storage compartment behind the brackets
C
» Fig. 239 .
›
Push in the storage compartment in the opposite direction of the arrow
5
.
›
Insert the brake rod and lock it against the arrow
4
with a screwdriver.
›
Push in the side cover against the direction of the arrow
2
.
›
Press the side cover fully against the direction of the arrow
1
.
›
Close the storage compartment.
Assignment of the fuses in the dash panel
Fig. 240
Fuses
Read and observe and on page 227 first.
No.Consumer1Not assigned2Not assigned3Not assigned4Not assigned5Databus6Alarm sensor7Air conditioning, heating, recipient of the wireless remote control
for auxiliary heating, selector lever of the automatic transmission8Light switch, rain sensor, diagnostic socket9Haldex clutch10Touchscreen11Heated rear seatsNo.Consumer12Radio13Belt tensioner - driver's side14Air blower for air conditioning,heating15Electric steering lock16Signal amplifier for telephone, telephone preinstallation17Instrument cluster18Not assigned19KESSY20Operating lever underneath the steering wheel21Not assigned22Towing hitch - contact in the socket23Light - right24Panorama roof25Central locking front door - left, power windows - left26Heated front seats27Music amplifier28Towing hitch - left light29CNG relay30Not assigned31Headlight - left32Parking aid (Park Assist)33Airbag switch for hazard warning lights
34
TCS, ESC button, tyre control display, pressure sensor for air-condi-
tioning, reverse light switch, interior mirror with automatic dim-
ming, START-STOP button, telephone preinstallation, control for
heating of rear seats, sensor for air-conditioning, 230 V power
socket, sport-sound generator35Headlight, headlamp beam adjustment, diagnostic connector, cam-
era, radar36Headlight right37Headlight left38Towing hitch - right light 228Do-it-yourself

No.Consumer39Central locking front door - right, power windows - front and rear
right4012-Volt power socket41Not assigned42Central locking rear door - left, right, headlight washer system,
windscreen washer system43Visor for gas discharge bulbs, interior lighting44Towing hitch - contact in the socket45Operating the seat adjustment46230-Volt power socket47Rear window wiper48Not assigned49Coil on starter relay, clutch pedal switch50Opening the boot lid51Belt tensioner - front passenger side52Not assigned53Relay for rear window heater
Fuses in the engine compartment
Fig. 241
Removing the fuse box cover/fuses
Fig. 242
Cover for the fuse box in the en-
gine compartment: Plastic clip
for fuses
Read and observe and on page 227 first.
Replacing fuses
›
Press together the interlocks of the cover simultaneously in the direction of
the arrow
1
» Fig. 241 .
›
Remove the cover in the direction of the arrow
2
.
›
Replace the appropriate fuse.
›
Place the cover on top of the fusebox.
›
Push in the interlocks on the cover and lock.
CAUTION
The cover for the fuse box in the engine compartment must always be applied
correctly. Water may get into the fuse box if the cover is not replaced properly
- there is a risk of damage to the vehicle.
Assignment of fuses in the engine compartment
Read and observe
and on page 227 first.
No.Consumer1ESC, ABS2ESC, ABS3Engine control unit4Radiator fan, oil temperature sensor, air volume sensor, control
valve for fuel pressure, relay for electrical auxiliary heating, engine
components5Coil of the relay for the ignition system, coil of the CNG relay, en-
gine components6Brake sensor7Coolant pump, radiator shutter, engine components 229Fuses and light bulbs