2008 AUDI A4 Owners Manual

Self-help295
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data terminal must not touch metal parts of the vehicle: this can cause
short circuiting.
•
Do not bend over the batteries – risk of acid burns.
•
The screw plugs on the battery cells must be screwed in firmly.
•
Keep sparks, flame and lighted cigarettes away from batteries:
the gases given off can cause an explosion.
•
If jump-starting another vehicle, position the jump leads in
such a way that they cannot come into contact with any moving
parts in the engine compartment of the other vehicle.Caution
Please note that the above method of connecting the leads is meant
for jump-starting your vehicle. If jump-starting another vehicle, you
should not connect the negative lead (–) to the negative terminal of
the discharged battery, but directly to the engine block or a solid
metal part bolted to the engine block. If the battery of the other
vehicle does not have a gas vent, there is a risk that a mixture of
oxygen and hydrogen gas can accumulate and cause an
explosion.Tow-starting and towing awayGeneral notes
Points to observe when tow-starting or towing awayIf you use a towrope:
Notes for the driver of the towing vehicle
– The towrope must be taut before driving off.– Engage the clutch very gently when starting to move; on
vehicles with automatic gearbox press the accelerator
slowly.
Notes for the driver of the towed vehicle
– The ignition should be switched on so that the turn
signals, horn, windscreen wipers and washers can be
used. Please ensure that the steering wheel is unlocked
when you switch on the ignition, and that it moves freely.
–Put gear lever in neutral (manual gearbox) or move
selector lever to position N (automatic gearbox).
– The brake servo and power steering only work when the
engine is running. Considerably more effort is required
on the brake pedal and steering wheel when the engine
is switched off.
– Ensure that the towrope remains taut at all times when
towing.
Towrope or towbar
It is easier and safer to tow a vehicle with a towbar. You should only
use a towrope if you do not have a towbar.
A towrope should be slightly elastic to reduce the loading on both
vehicles. It is advisable to use a towrope made of synthetic fibre or
similar material.
Attach the tow-rope or tow-bar only to the towing anchorages
intended for this purpose ⇒page 296 or ⇒page 297.
Driving technique
Towing requires some experience – especially when using a
towrope. Both drivers should be familiar with the technique required
for towing. Inexperienced drivers should not attempt to tow-start or
tow away another vehicle.
WARNING (continued)
document_0900452a81b1b9de.book Seite 295 Donnerstag, 26. Juli 2007 9:16 09

Self-help 296Do not pull too hard with the towing vehicle and take care to avoid
jerking the towrope. When towing on a loose surface there is always
a risk of overloading and damaging the anchorage points.
Caution
If there is no oil in the gearbox or no lubricant in the automatic
transmission the car may only be towed with the driven wheels
lifted clear of the road, or transported on a special car transporter
or trailer.
Note
•
Note the regulations concerning towing.
•
The hazard warning lights of both vehicles must normally be
switched on. However, observe any regulations to the contrary.
•
Make sure that the towrope is not twisted, as otherwise the front
towline anchorage on your vehicle could work itself loose.
Front towline anchorage
The front towline anchorage is only mounted if the vehicle
has to be towed.
The screw connection for the towline anchorage is located
behind a cover cap on the right side of the front bumper.
– Take the towline anchorage out of the vehicle's tool kit
⇒page 283.
– To detach the cover cap from the bumper, firmly press
the lower part of the cap inwards to release it ⇒fig. 280.
– Screw the towline anchorage firmly all the way into the
screw connection ⇒fig. 281.After use, unscrew the towline anchorage and put it back in the
toolbox. Replace the cap in the bumper. The towline anchorage
should always be kept in the vehicle.
WARNING
If the towline anchorage is not screwed in as far as the stop, there
is a risk of the screw connection shearing off during towing (acci-
dent risk).
Fig. 280 Front
bumper: Cover cap
Fig. 281 Front
bumper: Fitting the
towing eye
document_0900452a81b1b9de.book Seite 296 Donnerstag, 26. Juli 2007 9:16 09

Self-help297
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Rear towline anchorage
Vehicles which do not have a factory-fitted towing
bracket* have a towline anchorage on the right side of the
rear bumper.Vehicles with towline anchorage
– Take the towline anchorage out of the vehicle's tool kit.
– To detach the cover cap from the bumper, firmly press
the lower part of the cap inwards to release it ⇒fig. 282.
– Screw the towline anchorage firmly all the way into the
screw connection.
Vehicles with towing bracket*
– Fit the towing bracket.
– Attach the towbar or the towrope to the towing bracket.After use, unscrew the towline anchorage and put it back in the
toolbox. Replace the cap in the screw connection. The towline
anchorage or towing bracket should always be kept in the vehicle.
Vehicles which have a factory-fitted towing bracket* do not have a
screw connection at the rear for the towline anchorage.
WARNING
•
If the towline anchorage is not screwed in as far as the stop,
there is a risk of the screw connection shearing off during towing
(accident risk).
•
If your car has a towing bracket*, please use only special tow
bars with suitable attachments (i.e. tow bars which are specially
designed for use with towing brackets) to avoid damage to the
coupling equipment.
•
If your car has a towing bracket*, please use only special
towing ropes (risk of accident).
To w - s t a r t i n g
As a general rule, tow-starting is not recommended.– Engage 2nd or 3rd gear before moving off.
– Press the clutch and hold the pedal down.
– Switch on the ignition.
– Once both vehicles are moving, release the clutch.
– As soon as the engine starts: press the clutch and put the
gear lever in neutral.If the engine will not start, it is best to try starting it using the
battery of another vehicle ⇒page 293 before attempting to tow
start. You should only try to tow-start the engine if jump-starting is
not successful. Tow-starting is an attempt to start the engine via the
movement of the wheels.
When tow-starting a vehicle with a petrol engine, do not tow it more
than a short distance, otherwise unburnt fuel can enter the catalytic
converter and cause damage.
For technical reasons, it is not possible to tow-start a vehicle with
automatic gearbox.
Fig. 282 Rear bumper:
Fitting the towing eye
document_0900452a81b1b9de.book Seite 297 Donnerstag, 26. Juli 2007 9:16 09

Self-help 298
WARNING
There is a high risk of accidents when tow-starting, as the towed
vehicle can easily be driven into the towing vehicle.
Caution
When tow-starting the vehicle, do not tow it further than 50 metres:
otherwise the catalytic converter could be damaged.Towing a vehicle with manual gearbox and front-wheel drive
Towing is relatively straightforward.Please observe the notes ⇒page 295.
The vehicle can be towed using a towbar or towrope in the normal
way, with all four wheels on the road; it can also be towed with
either the front or rear wheels lifted off the road. The vehicle must
not be towed faster than 50 km/h.Towing a vehicle with automatic gearbox and front-wheel drive
Certain restrictions must be observed when towing your
vehicle.Please observe the notes ⇒page 295.
The vehicle can be towed with a towbar or towrope in the normal
way, with all four wheels on the ground. When doing so, please note
the following points:•
Release the parking brake ⇒page 121.
•
Make sure the selector lever is in the N position.
•
The vehicle must not be towed faster than 50 km/h.
•
The vehicle must not be towed further than 50 km. The reason
for this is: when the engine is not running, the gearbox oil pump
does not work and the gearbox is not adequately lubricated for
higher speeds or longer distances.
If the vehicle has to be towed with a breakdown truck, it must only
be suspended at the front wheels. The reason for this is: the drive
shafts are located on the front wheels. If the car is towed with the
rear wheels lifted off the road (i.e. travelling backwards), the drive
shafts also turn backwards. The planetary gears in the automatic
gearbox then turn at such high speeds that the gearbox will be
severely damaged in a short time.Note
If it is not possible to tow the vehicle as described above, or if it has
to be towed further than 50 km, it must be transported on a special
car transporter or trailer.Towing a vehicle with manual gearbox and four-wheel drive
Certain restrictions must be observed when towing your
vehicle.Please observe the notes ⇒page 295.
The vehicle can be towed with a towbar or towrope in the normal
way, with all four wheels on the ground. It can also be towed by a
breakdown truck, with the wheels lifted at either the front or rear.
When doing so, please note the following points:•
The vehicle must not be towed faster than 50 km/h.
•
The vehicle must not be towed further than 50 km.
document_0900452a81b1b9de.book Seite 298 Donnerstag, 26. Juli 2007 9:16 09

Self-help299
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data
Note
If it is not possible to tow the vehicle as described above, or if it has
to be towed further than 50 km, it must be transported on a special
car transporter or trailer.Towing a vehicle with automatic gearbox and four-wheel drive
Certain restrictions must be observed when towing your
vehicle.Please observe the notes ⇒page 295.
The vehicle can be towed with a towbar or towrope in the normal
way, with all four wheels on the ground. When doing so, please note
the following points:•
Release the parking brake ⇒page 121.
•
Make sure the selector lever is in the N position.
•
The vehicle must not be towed faster than 50 km/h.
•
The vehicle must not be towed further than 50 km. The reason
for this is: when the engine is not running, the gearbox oil pump
does not work and the gearbox is not adequately lubricated for
higher speeds or longer distances.
The vehicle must not be towed with the wheels lifted at either the
front or rear.Note
If it is not possible to tow the vehicle as described above, or if it has
to be towed further than 50 km, it must be transported on a special
car transporter or trailer.
document_0900452a81b1b9de.book Seite 299 Donnerstag, 26. Juli 2007 9:16 09

Fuses and bulbs 300Fuses and bulbsFusesChanging a fuse
If a fuse has blown it must be replaced.– Identify the fuse for the failed component.
– Switch off the ignition and the component concerned.
– Remove the fuse box cover ⇒fig. 283.
– Take the plastic clip from inside the fuse cover, fit it onto
the blown fuse, and pull the fuse out.
– Replace the blown fuse (which will have a melted metal
strip) with a new fuse of the same amp rating.The various electrical circuits are protected by fuses. The fuse boxes
are located behind covers on the left and right sides of the dash
panel and in the compartment on the right side of the boot.
A plastic clip for removing the fuses is provided in the fuse cover on
the left side of the dash panel. There is also a sticker listing the fuses
in each of the fuse boxes in the dash panel.
Caution
Never attempt to “repair” a fuse or replace it by fitting a fuse with a
higher rating - risk of fire! It could also cause damage to other parts
of the electrical system.
Note
If a newly replaced fuse blows again after a short time, the electrical
system must be checked by a qualified workshop as soon as
possible.Fuses on the driver's sideSome of the items listed are only fitted on certain models or are
optional extras.
Please note that the following list, while correct at the time of
printing, is subject to alterations. If discrepancies should occur,
please refer to the sticker on the inside of the fuse cover for the
correct information for your vehicle.
Fig. 283 Left side of
dash panel: Fuse cover
Fig. 284 Diagram of
fuse box (left-hand
drive vehicle)
document_0900452a81b1b9de.book Seite 300 Donnerstag, 26. Juli 2007 9:16 09

Fuses and bulbs301
Controls
Safety
Driving tips
General maintenance
Self-help
Technical data The seats with electrical adjustment are protected by circuit
breakers. These reset automatically after a few seconds when the
overload has been corrected.
Fuse list
Fuse listFuse list
No.
Electrical equipment
amps
Fuse carrier (black)
1
Dynamic steering
5
2
Clutch sensor
5
3
Garage door opener
5
4
Audi lane assist
10
5
Air conditioner
5
6
Headlight range control (right)
5
7
Headlight range control (left)
5
8
Control unit 1 for vehicle's electrical system
5
9
Interior mirrors
5
10
Selector gate
5
11
Heated washer jets
5
12
Air conditioner
5
No.
Electrical equipment
amps
Fuse carrier (brown)
1
Vacant
2
Clutch sensor
5
3
Fuel pump (diesel/petrol)
20/25
4
Auxiliary water pump (3.2 FSI)
5
5
Seat heating (left-side) with/without seat venti-
lation
30
6
Electronic stabilisation program
10
7
Horn
25
8
Electric window motor (left door)
30
9
Wiper motor
30
10
Electronic stabilisation program
25
11
Door control unit (driver's side)
15
12
Rain and light sensor
5
No.
Electrical equipment
amps
Fuse carrier (red)
1
Vacant
2
Vacant
3
Lumbar support
10
4
Dynamic steering
35
5
Interior light
5
6
Control unit 1 for vehicle's electrical system
35
7
Control unit 1 for vehicle's electrical system
30
8
Control unit 1 for vehicle's electrical system
30
9
Tilting panorama roof/sun roof
20
10
Control unit 1 for vehicle's electrical system
30
11
Vacant
12
Convenience electronics
5
No.
Electrical equipment
amps
document_0900452a81b1b9de.book Seite 301 Donnerstag, 26. Juli 2007 9:16 09

Fuses and bulbs 302Fuses on the passenger's sideSome of the items listed are only fitted on certain models or are
optional extras.
Please note that the following list, while correct at the time of
printing, is subject to alterations. If discrepancies should occur,
please refer to the sticker on the inside of the fuse cover for the
correct information for your vehicle.
The seats with electrical adjustment are protected by circuit
breakers. These reset automatically after a few seconds when the
overload has been corrected.
Fuse listFuse listNo.
Electrical equipment
amps
Fuse carrier (black)1
Vacant
2
Vacant
3
Vacant
4
Vacant
5
Steering column switch module
5
6
Electronic Stabilisation Program
5
Fig. 285 Diagram of
fuse box (left-hand
drive vehicle)
7
Diagnostic connector
5
8
Gateway (diagnostic interface for data bus)
5
9
Vacant
10
Vacant
11
Vacant
12
Vacant
No.
Electrical equipment
amps
Fuse carrier (brown)1
CD drive
5
2
Switch module for Audi drive select
5
3
MMI/Radio
10/20
4
Light switch
5
5
Control unit for instrument cluster
5
6
Ignition lock
5
7
Vacant
8
Air conditioner blower
40
9
Steering column lock
5
10
Air conditioner
10
11
Diagnostic connector
10
12
Steering column switch module
5
No.
Electrical equipment
amps
document_0900452a81b1b9de.book Seite 302 Donnerstag, 26. Juli 2007 9:16 09