• when driving in deep snow or on loose ground and
• when rocking the vehicle loose after it has become stuck.
When the abnormal situation is over, you should activate the ASR again.
& WARNING
The increased safety afforded by ASR does not mean that you can
take safety risks. Always adapt your driving style to the road
conditions and traffic situation.
[ i J Tips
To ensure that the ASR works properly, all four wheels must be fitted
with identical tires. Any differences in rolling radius of the tires can
cause the system to reduce engine power when this is not desired.
See also~
page 254, "New tires and replacing tires and wheels". •
Braking
Generat information
What affects braking efficiency?
Operating conditions and driving habits
The brakes on today's automobiles are still subject to wear,
depending largely on operating conditions and driving habits~& .
On vehicles that are either driven mostly in stop-and-go city traffic
or are driven hard, the brake pads should be checked by your autho
rized Audi dealer more often than specified in the
Warranty & Main
tenance booklet.
Failure to have your brake pads inspected can
result in reduced brake performance.
On steep slopes, you should use the braking effect of the engine.
This way, you prevent unnecessary wear on the brake system. If you
Controls and equip
ment Safety first Vehicle operation
Intelligent technology
must use your brakes, do not hold the brakes down continuously.
Pump the
brakes at intervals.
Moisture or road salt
If you are driving faster than 50 mph (80 km/h) and the windshield
wipers are on, the brake pads will briefly touch the brake discs in
regular intervals so as to improve reaction time when braking on
wet surfaces. You, the driver, will not notice anything .
Under certain conditions, for example, when driving through water
or very heavy rain, or even after washing your vehicle, the braking
effect can be reduced due to moisture (or in freezing conditions ice)
on the brake pads. A few cautious brake applications should dry off
the brake pads or remove any ice coatings .
The effectiveness of the brakes can be reduced when the vehicle is
driven on a salt-covered road and the brakes are not used . Likewise,
you clean off accumulated salt coating from brake discs and pads
with a few cautious applications of the brake~&.
Corrosion
There may be a tendency for dirt to build up on the brake pads and
corrosion to form on the discs if the car is not driven regularly or
only for short trips with little use of the brakes.
If the brakes are not used frequently, or if corrosion has formed on
the discs, it is advisable to clean off the pads and discs by braking
firmly a few times from a moderately high speed~& .
Faults in the brake system
If you should notice a sudden increase in brake pedal travel, then
one of the two brake circuits may have failed~ &.
Low brake fluid level
Malfunctions can occur in the brake system if the brake fluid level is
too low. The brake fluid level is monitored electronically.
Vehicle care Do-it-yourself service Technical data
-Intelligent technology
---""'------------ ....::....:...:~---------------------------
Brake lining wear status
Brake lining wear may be checked by visual inspection of the condi
tion of the brake pads through the openings in the wheel. If neces sary, the wheel may be removed for this inspection=> page
270,
"Wheel change" .
L1}. WARNING
• You should perform braking maneuvers for the purpose of
cleaning the brake system only if road conditions permit. Other
road users must not be put at risk -you may cause an accident!
• Before descending a steep grade, reduce speed and shift trans
mission into a lower gear or lower driving range. Do not ride the
brakes or hold the pedal down too long or too often. This could
cause the brakes to get hot and diminish braking efficiency.
• Do not "ride the brakes" by resting your foot on the pedal when
you do not intend to brake. This may cause the brakes to overheat,
premature wear and increased stopping distance.
• Under certain climatic and operating conditions such as
passing through water, driving in heavy rain or after washing the
vehicle, the effectiveness of the brakes can be reduced. In winter,
ice can accumulate on the brake pads, linings, discs and drums.
Carefully apply brakes for a test. Brakes will dry and ice coatings
will be cleaned off after a few careful brake applications.
• Driving for an extended period of time on salt-covered roads
without using your brakes can also affect braking efficiency. Clean
off accumulated salt coating from brake discs and pads with a few
careful brake applications.
• If you damage the front spoiler, or if you install a different
spoiler, be sure the air flow to the front brakes is not obstructed.
Otherwise the brake system could overheat reducing the effective
ness of the entire brake system.
• Failure of one brake circuit will impair the braking capability
resulting in an increased stopping distance. Avoid driving the
& WARNING (continued)
vehicle and have it towed to the nearest authorized Audi dealer or
qualified workshop. •
Brake booster
The brake booster adds extra braking power.
The brake booster works with vacuum pressure which is created
only when the engine is running=>& .
L1}. WARNING
• Never let the vehicle roll to a stop with the engine shut off.
• If the brake booster is not working, for example when towing
your vehicle, or because the brake booster has somehow been
damaged, the brake pedal must be pressed considerably harder to
make up for the lack of booster assistance. •
Func ... ion=ng of Anti-Lock Brake System (ABS)
ABS prevents the wheels from locking up under braking.
The ABS contributes effectively to vehicle control since it prevents
the wheels from locking when the brakes are applied. This means
that the vehicle remains steerable and is less likely to skid.
With ABS you do not need to pump the brake. Just hold the brake
pedal down.
However, do not expect that the ABS shortens braking distance
under
all circumstances . When driving on gravel or on newly fallen
snow on top of icy surfaces, braking distance may be even longer,
therefore, under these circumstances, it is especially important that
you drive slowly and with great care. .,_
IIIJl1.--___;;F...; u::. s .::..:: e~s :.....:: a..:..n .:..; d::....; b.:..:. u..:..lb ;:..:: s _______________________________________________ _
No. UEquipment Amps I No. Equipment
Amps
F6 Steering wheel electronics
5 F28
Not used
F7 Not used F29 Fuse assignment in the
left-side instrument
50
F8 Not used panel (special equipment)
F9 Not used F30 Power supply relay terminal
15 50
F10 Engine control module, main relay 5/10
Variation
(2) with 54 Plug-in Fuses
F11 Not used No. Equipment Amps
F12 Control module for CAN data
transfer (gateway)
5
Body control module (right)
F1 30
F13 Engine control module 15/25/30
20/30
F2 ESP valves, Anti-lock brake system (ABS) valves
F14 Ignition coils, engine components (diesel
20 F3 Terminal 30 40
engine)
Preheating control module/engine component, F4
Battery voltage
5
F15 tank diagnosis, oxygen sensor 5/10
F5 Horn 15
F16 Body control module (right)
30 F6 Not used
F17 Horn 15
F7 Not used
Audio amplifier 30 F8 Not used
F19 Front windshield wiper system 30
F9 Engine components 10
F20 Water pump, volume regulator valve 10/20
F10 Fuel tank control, mass air flow sensor
10
F21 Oxygen sensor, vacuum pump 10/15
F11 Oxygen sensors, in front of catalytic converter 10
F22 Clutch pedal switch, brake light switch 5
F12 Oxygen sensors, behind catalytic converter 10
F23 engine components, water pump 5/10/15
F13 Automatic transmission 15
Engine components, water pump 10 F14 Not used
F25 Pump (ESP/ABS), ABS valve
40
F15 Water pump 10
F26 Body control module (left) 30
F16 Volume control valve 20
F27 Secondary air pump, preheating control module 40 F17 Steering wheel electronics 5
F18 Audio amplifier 30
F19 Not used
_________________________________________________ F_ u_ s_ e_s _ a_n _ d_ b_ u_lb _ s __ ffllll
N "E .
o . qu1pm ent Amps I No. Equ ipment Amps
F20 Not used
I F45 Not used
F21 Not used F46 Not used
F22 Not used F47 Body control module Ueftl 30
F23 Engine control module, main re
lay
10 Pump (ESP/ABS), ABS va
lve
40
F24 Control module for CAN d ata transfer (gateway) 5 F49 Not used
F25 Not used F50 Not used
Not used F51 Not used
F27 Not used F52 Power supply re lay terminal 15 50
F28 Engine control module 15/25
F53 Fuse assignment in the left
-side instrument
50
F29 Engine components 5 panel (special equipment)
Not use d Not used
•
F31 Front windshield wiper system
30
Not used
Bulbs
F33 Not used
Replacing light bulbs
F34 Not used
F35 Not used
For your safety, we recommend that you have your autho-
rized Audi dealer replace burned out bulbs for you.
Not use d
F37 Not used It is becom
ing increasingly more and more difficult to replace
vehic le light bu lbs since in many cases, other parts of the car must
F38 Engine components, tank diagnosis 1 0 first be removed before you a re able to get to the bulb . This applies
F39 Clutch pedal switch, b rake light switch 5 especia
lly to the light bu lbs in the front of your car which you can
only reac h through the engine compartment.
Ignition coils
20
Sheet meta l and bulb holders can have sharp edges that can cause
F41 Not used
serious cuts, and parts must be correctly taken apart and then prop -
Not use d erly put back together to he
lp prevent breakage of parts and long
F43 Not used term damage from water that can enter housings that have not
been properly resea led .
...
Not used
• Do-it -yourself service