Heating and air conditioning system115
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
WARNING
•The auxiliary heating must never be operated in closed rooms - risk of
poisoning!
•The auxiliary heating must not be running during refueling - risk of fire.
•The exhaust pipe of the auxiliary heating is located on the underside of
the vehicle. Therefore do not place the vehicle, if you wish to operate the
auxiliary heating, in such a way that the exhaust gases of the auxiliary
heating can come easily into contact with inflammable materials (e.g. dry
grass) or easily inflammable su bstances (e.g. fuel run out).
Note
•If the auxiliary heating runs, the fuel consumption comes from the vehicle tank.
Therefore the auxiliary heating should not be operated, if there is very little fuel in
the tank.
•The exhaust pipe of the auxiliary heating, which is located on the underside of
the vehicle, must not be clogged and the exhaust flow must not be blocked.
•If the auxiliary heat ing and ventilation is running, the vehicle battery discharges.
If the auxiliary heating and ventilation has been operated several times over a
longer period, the vehicle must be driven a few kilometers in order to recharge the
vehicle battery.
•The auxiliary heating only sw itches the blower on, if it has achieved a coolant
temperature of approx. 50 °C.
•At low outside temperatures, this can resu lt in a formation of water vapour in
the area of the engine compartment. This is quite normal and is not an operating
problem.
•After switching off the auxiliary heating, the coolant pump runs for a short
period.
•The auxiliary heating and ventilation does not switch on or comes on, if the
vehicle battery indicate s a low loading state.
•The auxiliary heating (auxiliary heating) switches on, if in the information
display: Please refuel! is indicated or was indicated before switching off the igni-
tion.
•When driving, the auxiliary heating can only be switched on, if the exterior
temperature is lower than 5 °C.
•The air inlet in front of the windscreen mu st be free of ice, snow or leaves in
order to ensure that the auxiliary heating operates properly.
•So that the warm air can flow into the vehicle interior after switching on the
auxiliary heating (auxiliary heating), the control dial ⇒page 100, fig. 119 must
be turned up to the stop to the right when heating. With Climatic and Climatronic,
you can maintain the temperature norma lly selected by you (we recommend 22
°C). It is recommended to put the air flow in the position
. For heating and
climatic put the blower switch ⇒page 100, fig. 119 if necessary ⇒page 104,
fig. 122 in the position 2.
•On vehicles with DPF (die sel particle filter) the warm coolant heats up the
engine.
AA
AB
NKO A5 20 MR08.book Page 115 Wednesday, April 11, 2007 2:54 PM
Starting-off and Driving
118
Starting the engine
General
You can only start the engine only using an original ignition key.
•Place the gearshift lever into neutral (or place the selector lever to the position
P or N in the case of an automatic gearbox) and put on the handbrake firmly before
starting the engine.
•The clutch pedal should be fully depressed when starting the engine which
means that the starter only has to crank the engine.
•Let go of the key as soon as the engine starts otherwise there may be damage
to the starter.
The engine running noises ma y louder at first be louder for a short time after
starting the cold engine until oil pressure can be built up in the hydraulic valve
clearance compensation. This is quite no rmal and is not an operating problem.
If the engine does not start ...
You can use the battery of anothe r vehicle as a jump-start aid ⇒page 238.
It is only possible to tow-start vehicles fitted with a manual gearbox. The tow-
starting distance must not be more than 50 metres ⇒page 242.
WARNING
•Never run the engine in non ventilat ed or enclosed areas. The exhaust
gases of the engine contain besides the odorless and colourless carbon
monoxide a poisonous gas - hazard! Carbon monoxide can cause uncon-
sciousness and death.
•Never leave your vehicle unattended with the engine running.
Caution
•The starter may only be operated (ignition key position ), if the engine is not
running. If the starter is immediately operated after switching off the engine, the
starter or the engine can be damaged.
•Avoid high engine revolutions, full throttle and high engine loads as long as the
engine has not yet reached its normal oper ating temperature - risk of damaging the
engine!
•Vehicles which are fitted with an exhaust gas catalytic conver ter should not be
tow-started over a distance of more than 50 metres.
For the sake of the environment
Never warm up the engine when the vehicle is standing. Drive off right away.
Through this the engine reaches its operating temperature more rapidly and the
pollutant emissions are lower.
Petrol engines
These engines are fitted with a starter system which selects the correct fuel/air
mixture for every external air temperature.
•Do not operate accelerator befo re and when starting engine.
•Interrupt the attempt at starting after 10 seconds if the engine does not start
right awayand wait for about 30 seconds before repeating the attempt.
•It is possible that the fuse on the electrical fuel pump is defect if the engine still
does not start. Check the fuse and replace it if necessary ⇒page 243.
•Contact the nearest specialist garage to obtain professional assistance.
It may be necessary, if the engine is very hot, to slightly depress the accelerator
after the engine has started.
Diesel engines
Glow plug system
Diesel engines are equipped with a glow plug system, the preglow period being
controlled automatically in line with the coolant temperature and outside temper-
ature.
The preglow indicator light
comes on after the igniti on has been switched on.
A3
NKO A5 20 MR08.book Page 118 Wednesday, April 11, 2007 2:54 PM
Fuel
208
– Unscrew the fuel filler cap anti-clo ckwise and place the fuel filler cap
from above on the fuel filler flap ⇒page 207, fig. 193 .
Closing fuel filler cap
– Screw on the cap by turning it to the right until it is heard to lock.
– The fuel filler cap on the fuel filler tube must be locked to the right using the vehicle key (only valid for vehicles which do not have auto-
matic locking of the fuel filler flap).
– Press the fuel tank flap closed.
The correct grade of fuel for your vehicle as well as the tyre size and inflation pres-
sures are stated on a sticker affixed to the inside of the fuel filler flap. Further infor-
mation on fuel ⇒page 206, “Fuel”.
The fuel tank has a capacity of about 55 litres.
WARNING
Pay attention to any legal requirements if you do carry a spare canister in the
vehicle. We do not recommend carrying any fuel canisters in your vehicle for
safety reasons. The canister can be da maged in the event of an accident and
fuel may leak out.
Caution
•Before refuelling it is necessary to switch off the auxiliary heating system (auxil-
iary heating and ventilation) *.
•Remove any fuel which has spilled onto the paintwork of your vehicle immedi-
ately - risk of paint damage!
•Vehicles fitted with catalytic converter should neve r be allowed to let the fuel
tank to run completely empty. An irregular supply of fuel to the engine can result in
misfiring and unburnt fuel may get into the exhaust system, which may result in
overheating and damage to the catalytic converter.
•Make sure that the valve is not pressed into the filler tube when inserting the
pump nozzle into the filler tube. Otherwis e you are unintentionally filling up the volume, which in case of heat can cause an
expansion of the fuel. This can lead to
an overflow of fuel or damage to parts of the fuel reservoir.
•T h e f u e l t a n k i s f u l l j u s t a s s o o n a s t h e pump nozzle switches off for the first time,
provided the nozzle has been operated pr operly. Do not continue refuelling -
otherwise the expansion volume is filled up.
NKO A5 20 MR08.book Page 208 Wednesday, April 11, 2007 2:54 PM
Breakdown assistance
242
Tow-starting a vehicle
If the engine does not start, we generally do not recommend to tow-start
your vehicle. One should attempt to start the engine using jump start
cables ⇒page 238 or call on the servic es of the SERVICE mobile.
If your vehicle has to be towed:
– Engage 2nd or 3rd gear wi th the vehicle stationary.
– Depress the clutch pedal fully and keep it depressed.
– Switch on the ignition.
– Wait until both vehicles are movi ng then release the clutch pedal
slowly.
– Depress the clutch pedal fully when the engine fires and take the vehicle out of gear.
For technical reasons it is not possibl e to tow-start a car fitted with an automatic
gearbox .
WARNING
There is high risk of having an accide nt when tow-starting a vehicle, when
for example the towed vehicle r uns into the towing vehicle.
Caution
Vehicles which are fitted with a catalytic converter should not be tow-started over
a distance of more than 50 metres. Unburnt fuel may get into the catalytic converter
and damage it.
Towing in a vehicle fitted with a manual gearbox
Please refer to the notes ⇒page 239. The car can be towed in with a tow bar or a
tow rope or with the front or rear wheels
raised. The maximum towing speed is 50 km/h.
Towing of a vehicle with an automatic gearbox
Please refer to the notes ⇒ page 239.
The car can be towed in with a tow bar or a tow rope. Refer at the same time to the
following guidelines:
•Move selector lever into N .
•The maximum towing speed is 50 km/h.
•The maximum permissible towing distance is 50 km. The gear oil pump does
not operate when the engine is not runni ng; the gearbox would not be adequately
lubricated at higher speeds an d over longer towing distance.
Caution
If the vehicle is towed in by a recovery vehi cle, it should only be towed in with the
front wheels raised. If the vehicle is ra ised at rear, the automatic gearbox is
damaged! (Does not apply to the automatic gearbox DSG).
Note
The vehicle must be transported on a special vehicle or trailer if it is not possible to
tow in the vehicle in the way described or if the towing distance is greater than
50 km.
NKO A5 20 MR08.book Page 242 Wednesday, April 11, 2007 2:54 PM
Fuses and light bulbs
244
Fuse cover in engine compartment
The fuse box in the engine comp artment exists in two different
versions. You can determine which vers ion your vehicle is fitted with
after removing the fuse cover at the location of the fuses.
For particular model versions, the battery must be removed before
removing the fuse cover ⇒page 218.
Removing fuse cover
– Move the circlips ⇒fig. 223 as far as the stop, the symbol
appears behind the circlip and remove the cover.
Installing fuse cover
– Position the fuse cover on the fuse box and push the circlips as far as the stop - the symbol
is visible behind the circlip.
Caution
•When unlocking and locking the fuse cover, it must be pressed on the sides to
the box, otherwise damage can occur to the locking mechanism.
•Carefully position the fuse cover in the engine compartment. If the cover was
not correctly positioned, water can get into the fuses and this results in a damage
to the vehicle!
Fuse assignment in engine compartment - version 1
Certain electrical components are only standard on certain vehicle model versions
or only suppliable as optional equipment for certain models.
Fig. 223 Fuse cover in
engine compartment
AA
AA
No.Power consumerAmperes
F1Pump for ABS30
F2Valves for ABS30
F3Not assigned
F4Measuring circuit5
F5Horn15
F6Valve for fuel dosing15
F7Not assigned
F8Not assigned
F9Activated charcoal filter, exhaust gas recirculation
valve10
F10Leakage diagnosis pump10
Fig. 224 Schematic
representation of fuse
box in engine compart-
ment - version 1
NKO A5 20 MR08.book Page 244 Wednesday, April 11, 2007 2:54 PM
Fuses and light bulbs245
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
F11Lambda probe upstream of catalytic converter,
engine control unit10
F12Lambda probe downstream of catalytic converter10
F13Control unit for automatic gearbox15
F14Not assigned
F15Coolant pump10
F16Windshield wiper lever and turn signal light lever5
F17Instrument cluster5
F18Audio amplifier (sound system)30
F19Radio15
F20Phone5
F21Not assigned
F22Not assigned
F23Engine control unit10
F24Control unit for CAN databus5
F25Not assigned
F26Not assigned
F27Not assigned
F28Engine control unit25
F29Actuation for coolant pump after-running5
F30Control unit for auxiliary heating20
F31Front window wiper30
F32Not assigned
F33Not assigned
F34Not assigned
No.Power consumerAmperes
F35Not assigned
F36Not assigned
F37Not assigned
F38Radiator fan, valves10
F39Clutch pedal switch, brake pedal switch5
F40Ignition coils20
F41Not assigned
F42Actuation of fuel pump5
F43Not assigned
F44Not assigned
F45Not assigned
F46Not assigned
F47Central control unit, Left main headlights30
F48Central control unit, Right main headlights30
F49Power supply for terminal 15 (ignition on)40
F50Not assigned
F51Not assigned
F52Power supply relay - terminal X a)40
F53Accessory equipment50
F54Not assigned
a)In order not to drain the battery unnecessarily when starting the engine, the electrical
components of this terminal are automatically switched off.
No.Power consumerAmperes
NKO A5 20 MR08.book Page 245 Wednesday, April 11, 2007 2:54 PM
Fuses and light bulbs
246
Fuse assignment in engine compartment - version 2
Certain electrical components are only st andard on certain vehicle model versions
or only suppliable as optional equipment for certain models.
No.Power consumerAmperes
F1Not assigned
F2Windshield wiper lever and turn signal light lever5
F3Measuring circuit5
F4Valves for ABS30
F5Control unit for automatic gearbox15
F6Instrument cluster5
F7Not assigned
F8Radio15
F9Phone5
F10Engine control unit, Main relay5
F11Control unit for auxiliary heating20
Fig. 225 Schematic
representation of fuse
box in engine compart-
ment - version 2
F12Control unit for CAN databus5
F13Engine control unit15
F14Ignition20
F15Lambda probe, NOx-sensor, Fuel pump relay
Glow plug system relay15 5
F16Pump for ABS30
F17Horn15
F18Amplifier for digital sound processor30
F19Front window wiper30
F20Not assigned5
F21Lambda probe15
F22Clutch pedal switch, brake pedal switch5
F23Secondary air pump
Air mass meter
Fuel high pressure pump5
10
15
F24Activated charcoal filter, exhaust gas recirculation
valve10
F25Right lighting system30
F26Left lighting system30
F27Secondary air pump
Preglowing40
50
F28Power suppy terminal 15, Starter40
F29Power supply terminal 3050
F30Te r m i n a l Xa)40
a)In order not to drain the battery unnecessarily when starting the engine, the electrical
components of this terminal are automatically switched off.
No.Power consumerAmperes
NKO A5 20 MR08.book Page 246 Wednesday, April 11, 2007 2:54 PM
Fuses and light bulbs247
Using the systemSafetyDriving TipsGeneral MaintenanceBreakdown assistanceTechnical Data
Fuse assignment in the dash panel
Certain electrical components are only standard on certain vehicle model versions
or only suppliable as optional equipment for certain models.
No.Power consumerAmperes
1Diagnostic socket, Engine co ntrol unit, Electrical fuel
pump10
2Control unit for ABS, ESP5
3Airbag5
4Heating, Air conditioning system, Reversing lights5
5Control unit for headla mp beam adjustment5
6Instrument cluster, Contro l unit for automatic gear-
box, Control unit for elec tromechanical power steer-
ing, Parking aid; Haldex clutch5
7Not assigned
8Not assigned
9Not assigned
Fig. 226 Schematic
representation of the
fuse carrier in the dash
panel
10Not assigned
11Not assigned
12Central locking control unit10
13Diagnostic socket, Light switch, Brake light10
14Control unit for automatic gearbox, Selector lever
lock5
15Central control unit - interior lights7,5
16Climatronic10
17Not assigned
18Parking aid5
19Control unit for trailer detection5
20Uphill-Start off-Assist5
21Not assigned
22Air blower for Climatronic40
23Front power window30
24Cigarette lighter25
25Rear window heater
Rear window heater, Auxiliar y heating (auxiliary heat-
ing and ventilation)25
30
26Power socket in the luggage compartment20
27Fuel pump relay, Injection valves (diesel engine)15
28Not assigned
29Engine control unit, Crankcase ventilation heater10
30Control unit for automatic gearbox20
31Vacuum pump20
32Rear power window30
No.Power consumerAmperes
NKO A5 20 MR08.book Page 247 Wednesday, April 11, 2007 2:54 PM