2011 AUDI A6 differential

Anti-lock brake system (ABS)
A ...
.j {USA models) /..., {Canada models)
This warning/indicator light monitors the ABS and the
electronic differential lock (EDL) .
The warning/indicator light will come on for a few seconds when the
ign ition is switched on . The light w ill go out after an a utomat ic check
sequence is comp leted .
There is a malfunction in the ABS when: • Th e warn ing/ indic ator light does not ill uminate when you swi tch
on the ig nit io n.
• Th e warn ing/ in dic ator lig ht does not go out a fter a few se conds .
• The warning/ind icator light illuminates while d riving.
The brake sy stem will still re spond even without the a ssistance of
the ABS system . See your authorized Audi dealer as soon as
possible to restore full braking performance.
For more i nformat ion
regarding the ABS=>
page 246.
The ABS warning l ight and the brake warning light come on
together. The ABS will not work and you will noti ce a change in
brak ing response and performance.
Malfunction in the brake system
If the brake warning light=> page 18 and the ABS warning ill uminate
together there may be a malfu nction in t he A BS, a nd there may a lso
be a malfunction in the brake system itself=>& .
In the even t of a
malfunction in the b rake system the warning/ indi ­
ca tor light
BRAKE (U SA mode ls)/ ((])) (Canada models) in the instrume nt
cl uster flashes . By p ressing the
I C H ECK ) button, you ca n bring up a
dr iver message w hic h explains the malfunc tion in mo re de tail. Please
not e=>
pag e 26 .
Controls and equip ­
ment Safety first
Instruments and warning
/indicator lights
Malfunction in the electroni c differential lock (EDL)
Th e ED L wor ks toge ther w it h the ABS . The A BS wa rning light will
come on if t he re is a malfunction in the EDL system=>
page 243. See
your authorized Aud i dea le r as soon as poss ible.
& WARNING
• If the ... Is~ (USA models)/ d (Canada models ) warning light
does not go out , o r if it comes on while driving, the ABS system is
not working properly . The vehicle can then be stopped only with
the standard brakes (without ABS ). You w ill not have the protec­
tion ABS provide s. Contact your Aud i dealer as soon as pos sible.
• USA models: If the BRAKE warning light and the 9 warning
light come on together, the rear wheel s could lock up fir st under
hard braking. Rear wheel lock-up can cau se los s of vehicle control
and an accident . Have your vehicle repaired immediately by you r
authorized Audi dealer or a qualified work shop. Drive slowly and
avoid sudden, hard brake applications.
• Canada models : If the brake warning light «D> and the ABS
warning light come on together , the rear wheels could lock up
first under hard braking . Rear wheel lock -up can cause loss of
vehicle control and an accident. Have your vehicle repaired imme­
diately by your authorized Audi dealer or a qualified work shop.
Drive slowly and a void sudden, hard brake applications. •
Electromechanical parking brake
~E {USA models) /(®) {Canada models)
The warning/indicator light monit ors the electromechan­
ical parking brake.
With the parking bra ke app lied and the ignition turned o n, t he
warning/indicator light illum inates. After the ign ition has been
t u rned
off, the wa rni ng/ind icator light co nti nu es to i llumi nate for
abou t 30 seconds . If the parki ng brake is applied w it h the ignition _,,
Vehicle care Technical data

Intelligent technology
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Intelligent technology
Notice about data recorded by
vehicle control modules
Your vehicle is not equipped with an Event Data Recorder (EDR),
installed by some manufacturers for the express purpose of
capturing data for retrieva l after an accident or crash event. ED R's are
sometimes called "crash recorders".
Some state laws restrict the retrieval or downloading of data stored
by ED R's that were installed in a vehicle for the express purpose of
retrieving data after an accident or crash event without the owner's
consent.
Although your vehicle is not equipped with an EDR, it is equipped w ith
a number of electronic control modu les for various vehicle systems
such as, for example, engine function, emission control, as well as for
the airbags and safety belts.
T hese electronic contro l modules also record vehicle-re lated data
during normal vehicle operation for diagnostic and repair purposes .
Th e recording capacity of the e lectronic control modu les is limited to
data (no sound is recorded) and only a sma ll amount of data is actu­
ally recorded over a very limited period of time and stored when a
system fault or other condition is sensed by a control unit. Some of
the data then stored may relate to vehicle speed, direction, braking
as well as restraint system use and performance in the event of a
crash or other condition. Stored data can only be read and down­
loaded with special equipment.
Electronic Stabilization Program
(ESP)
General information
The ESP improves the vehicle stability.
l, I
Fig. 201 Center
console with ESP
switch
ESP is des igned to help you maintain vehicle control in s ituations
where the car approaches the limits of "grip", especia lly when accel­
erat ing and cornering. ESP reduces the risk of skidd ing and imp roves
stability under all road conditions.
Th e system operates across the entire speed range in combination
with the ABS system. If the Anti-Lock Brake System (ABS) malfunc­
tions, the ESP will also shut down.
How the system works
The Anti-Lock Brake System (ABS), Electronic Differential Lock (EDL)
and the Anti-Slip Regulation System (ASR) are integrated in the elec­
tronic stabilizatio n pro gram. In addition to the data provided by
these funct ions, the ESP control unit requires additional measure­
ment data provided by high performance sensors. The rotational
speed of the vehicle about its vertical axis, veh icle acceleration in the ...

Intelligent technology
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fore-and-aft and lateral directions, the brake pressure and the
steering angle are all measured.
The direction in which the driver wishes to travel is determined with
the aid of the steering angle and vehicle speed and is continually
compared with the actual behavior of the vehicle. If the two do not
match, for example , when the vehicle starts hydroplaning on a wet
road, ESP will automatically brake the appropriate wheel to correct
the problem.
The vehicle is then stabilized by the forces acting on the wheel during
braking. If the vehicle is
oversteering (rear tends to skid out of the
turn), the brakes are mainly applied on the wheel that is on the
outside of the curve. In the case of a vehicle that is
understeering
(tendency to slide out of the curve), the brakes are applied at the rear
wheel that is on the inside of the curve. An acoustic signal indicates
when ESP brake application cuts in =>
&.
The system operates across the entire speed range in combination
with the ABS system=>
page 246. If the Anti-Lock Brake System
(ABS) malfunctions, the ESP will be out of action as well.
Activating
When you turn on the engine, ESP will automatically be activated and
will perform a self-test . As soon as the test is completed, the system
is in normal operating mode.
You can activate a deactivated ESP or deactivated ESP/ ASR if required
by pressing the=>
page 242, fig. 201 button. When they are acti­
vated, the message
ESP/ASR on appears briefly in the display .
Deactivating
The ESP should normally be activated all the time. If necessary , you
can deactivate Anti-Slip Regulation (ASR) or the Electronic Stabiliza­
tion Program (ESP) by pressing the button =>
page 242, fig. 201.
• Deactivating ASR: Tap the but ton . In certain excep tional situa­
tions (e.g. driving with tire chains) , the Anti-Slip Regulation (ASR) can
be deactivated=>
page 244 . The message ASR off appears in the
display as well.
Controls and equip­ ment Safety first Vehicle operation •
Deactivating ESP/ASR
Press the button for more than 3 seconds .
With the ESP/ASR deactivated, the ESP check light comes on, see
=>
page 14. The message ESP switched off appears in the display as
well.
& WARNING
The Electronic Stabilization Program is nevertheless subject to the laws of physics. It is particularly important to pay attention to
this fact on wet and slippery roads. It is therefore important that
you always adapt your driving to the condition of the road and traffic conditions. Do not allow the increased safety provided by
the Electronic Stabilization Program system to lull you into
accepting additional safety risks. •
Electronic differential lock (EDL)
The electronic differential lock monitors the rotational
speed of the drive wheels.
General notes
The electronic differential lock (EDL) helps the car to start moving,
accelerate and climb a gradient on surfaces providing poor or almost
no grip . Without EDL, this would be difficult, if not impossible .
How the system works
The EDL operates automatically . It monitors the rotational speed of
the drive wheels on an axle with the help of the ABS sensors
=>
page 246 . If a noticeable difference in rotational speed between
the drive wheels on one axle is detected (e.g. on slippery ground
on
one side),
the spinning wheel is braked, thereby transferring power to
the othe r drive wheel or wheels (all-wheel drive). This is done up to a
speed of about 60 mph (100 km/h) . Noises from the brake system
signal that wheel spin is being controlled.
Vehicle care Do-it-yourself service Technical data

ffl Alphabetical index ------',.__ ___________________________________ _
Driv ing messages ...... ...... .. .. .. .. 24
Dr iv ing safely ..... .. .. .. .. ...... ... 176
Dr iving through water ... ... ... .. .. .. 252
Dr iv ing time .. ............ .......... 34
Duplica te key . .... .... .. .. .. ........ 3 7
Dust fi lter
Climate controls .. .. .. .... .. .. . ...
96
DVD player for navigation system . .. . .. . 86
Dynam ic shift program ............ .. 1 56
E
Easy entry feature . .. .. .. .. .... ..... 1 08
Electric seat adjustment
See Power seat ................... 76
Electromechanical parking brake
Emergency braking . ... .. .. .... .. .
11 5
Ma lf u nct ion . . . . . . . . . . . . . . . . . . . . . 115
Operation . . . . . . . . . . . . . . . . . . . . . . 113
Park ing .................... .. .. 114
Releasing and app ly ing ... .. ... .. .. 113
Starting off w ith a t railer ......... . 115
Warning/ind icator lights . .......... 17
Electronic differential lock (EDL)
How the system works ... .........
243
Warning/ind icator lights . .......... 17
Electroni c immobili ze r ... .... .. .. .. .. . 4 0
Electronic powe r control
(EPC) war ning/ indicato r light .. .. ... .
14
Electronic speed limiter ........ .... .. . 23
Ele ctro nic s tabiliza tion p rogram ( ESP)
How t he system wor ks ... .........
2 4 2
W arning/ind icator lights . .......... 14
Emergency braking ..... .. .. .. .. .. .. 115
Emergency closing
Power su nroof ... ... .. .. . ... ...
55, 56
Eme rgency flasher ................ ... 61
Wa rning/ind icator l ights . .. .. .. .. .. 15
Emergency locking of doors . .. .. .. .. .. 45
E mergency sta rt ing .... ..... ... .. .. . 332
Emergency towing .................. 335
Energy management ................ 249
Battery power .. .. .. .. .. .... ..... 250
Dr iver not ification ............... . 250
Engine
Compartment . ... .. .. .. .. .. .. ...
280
Coolant .. ... .. .. .. .. .... .. .. .. . 286
Hood . ... .. .. .. .... ... .. .. .. .. . 278
Starting ....... .. .. ........ . 108, 109
Starting with jumpe r cab les . .. .... . 332
Stopping ...... .............. ...
110
Engine compa rtment
Sa fety instructions . .... ... .. .. .. .
2 79
Working the eng ine compartment .. 2 79
En gine coolant system ........ .. .. .. . 286
Add ing coolant ................. . 287
Checking coo la nt level . ..... .. .. .. 286
Checking the engine coo lant level . .. 286
Ma lfu nction ... .. ..... ..... .... .. . 27
Radiator fan ....... .. ... . .. .. ... 288
E ngine coo lant tempe rature
T emperat ure gauge ............. .. . 8
Engine data ....... ...... .... .. .....
343
Engine hood
Closing .... ..... ..... .... .. .. .. .
2 79
How to re lease the hood ..... .. ... . 278
Engine oil .. ... .... ... .. . ... ... .. .. 281
Add ing .............. .... ... .. .. 284
Add itives .................. .... . 284
Changing .. ..... .......... .. .. .. 285
Checking the engine oil leve l ..... .. 2 83
Indi cat io ns and conditions requiring extr a
check ing . .. .. .. .. .............
283
Oil consumption .... ............. 282
Oil grades . .. .. .... ..... ....... . 281
Recommended oil check intervals ... 283
Specification and viscosity ..... .. .. 28 1
Engine oil leve l .... .. .. ............. . 31
Engine oil p ress ure
Mal fu nct ion .. .. .. .. .... ..........
28
Engine oil sensor defect ive . ...... ... .. 31
Engine speed limitation ....... ... .. .. . 32
Environmen t
Bre ak-in per iod ...... ...... .. .. ..
2 51
Ca taly tic converte r .. .... ......... 2 52
Disposing o f you r vehi cle bat tery .... 29 4
Driving at hig h speeds ..... ... . ... 254
Driving to minimize poll ution and noise . .
253
Fuel .. .. .... ....... ...... .... .. 27 5
Fue l economy .. .. .. ....... .. .. .. 2 53
Leaks unde r yo ur vehicle ... .. .. .. . 2 79
Lett ing the vehicle stand and warm up .. .
254
Proper disposa l of dra ined brake fluid 289
Prope r disposal of dra ined engine coo la nt
287
Proper disposal of drained engine oil 284,
285
Recy cling used e ng ine o il .......... 2 8 4