brake AUDI A8 2020 Owner's Manual
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Page 136 of 360

Driving dynamic
EDL will switch on again automatically when con-
ditions have returned to normal.
Power steering
The ESC can also support vehicle stability
through steering.
Selective wheel torque control
Selective wheel torque control is used when driv-
ing on curves. Braking is targeted toward the
wheels on the inside of the curve as needed. This
allows more precise driving in curves.
Automatic post-collision braking system
The automatic post-collision braking system can
help to reduce the risk of sliding and of addition-
al collisions after an accident. If the airbag con-
trol module detects a collision, the vehicle is
braked by the ESC.
The vehicle does not brake automatically if one of
the following occurs:
— The driver presses the accelerator pedal, or
— The braking force generated by the pressed
brake pedal is greater than the braking force
that
would be initiated by the system
— The ESC, the brake system, or the vehicle elec-
trical system is not functioning
Z\ WARNING
— The ESC and its integrated systems cannot
overcome the limits imposed by natural
physical laws. This is especially important on
slippery or wet roads. If the systems begin
acting to stabilize your vehicle, you should
immediately alter your speed to match the
road and traffic conditions. Do not let the in-
creased safety provided tempt you into tak-
ing risks. This could increase your risk of a
collision.
— Please note the risk of a collision increases
when driving fast, especially through curves
and on slippery or wet roads, and when driv-
ing too close to objects ahead. There is still
a risk of accidents because the ESC and its
integrated systems cannot always prevent
collisions.
134
— Accelerate carefully when driving on
smooth, slippery surfaces such as ice and
snow. The drive wheels can spin even when
these control systems are installed and this
can affect driving stability and increase the
risk of a collision.
@) Tips
— The ABS and ASR only function correctly
when all four wheels have a similar wear
condition. Different tire sizes can lead to a
reduction in engine power.
— You may hear noises when the systems de-
scribed are working.
The So button for controlling the ESC is located
in the center console, in front of the selector lev-
er.
The ESC is automatically switched on when the
ignition is switched on. It may make sense in
some situations to limit the ESC so that the
wheels can spin:
— Rocking the vehicle to free it when it is stuck
— Driving in deep snow, on unpaved ground, or
with snow chains
Limiting ESC (sport mode)
—To limit the ESC, press the oF button briefly.
The B indicator light turns on.
— To completely reactivate the ESC stabilization
function, press the button again. The indicator
light turns off.
Switching off ESC
— To switch off the ESC, press and hold the Sor
button for more than three seconds. The B
and Ea indicator lights turn on.
— To completely reactivate the ESC stabilization
function, press the button again. The indicator
lights turn off.
Z\ WARNING
- When the ESC is switched off or limited,
there will be no vehicle stabilization or it will
be limited. The driving wheels could spin >
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4N0012721BD
Driving dynamic
and the vehicle could swerve, especially on
slick or slippery road surfaces, which in-
creases the risk of an accident.
— Because of the increased risk of an accident,
only drive with the ESC switched off or Limit-
ed when it is necessary. Reactivate the ESC
as soon as possible.
@) Tips
— If the ESC is limited, switched off, or mal-
functioning, systems with an automatic
braking intervention function may not be
fully available.
— If malfunctions occur in other systems or
certain driver assist systems are active, the
ESC must be switched on by the system. The
ESC
may switch on automatically and can-
not be operated with the button.
B&B fs / B ©) Stabilization control (ESC/
ABS): malfunction! See owner's manual
There is a malfunction in the ABS or EDL. This al-
so causes the ESC to malfunction. The brakes still
function with their normal power, but ABS is not
active.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
135
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4N0012721BD
High-voltage system
— IEC 61851 and IEC 62196 (Europe)
— SAE J1772 (North America, Japan)
— You can use your Audi charging system if
there is a household or industrial connec-
tion available at the charging station.
@ Tips
Applies to: Audi charging systems
— For an uninterrupted charging process, we
recommend only charging using sockets
that are connected to a separately protected
circuit.
— It is recommended to use Audi charging sys-
tems in the wall mount clip* during opera-
tion. If this is not possible, always position
Audi charging systems ona secure surface
during the charging process > A.
—To reduce the risk of overheating during op-
eration, do not place Audi charging systems
in direct sunlight for long periods of time. If
the control unit is overheated, the charging
process is automatically paused until the
temperature has lowered back within the
normal range.
Cee Tact)
Applies to: vehicles with plug-in hybrid drive
Fig. 106 Left rear side of the vehicle: opening the high-
voltage charging port door
RAZ-0835
Fig. 107 Charging unit: charging port and buttons/LED
Connecting the charging cable
If you charge your vehicle at a charging station,
the following sequence of steps may vary. Follow
the manufacturer guidelines and operating in-
structions for the charging station.
Requirement: the “P” gear must be selected, the
parking brake must be set, and drive ready mode
must have ended.
— If necessary, remove the charging cable from
the vehicle > page 144, Transport.
— Remove the cap from the charging cable if nec-
essary.
— First connect the charging cable to the power
supply, or remove it from the charging station.
— Unwind the charging cable completely.
— Unlock the vehicle.
— To open the charging port door, press on the
right
side of the door > fig. 106.
— Remove the cap from the vehicle charging port
and place it on the holder on the charging port
door.
— Plug the charging connector into the vehicle
charging port.
Starting to charge automatically (immediate
charging)
If charging is not delayed with a timer, the charg-
ing process will begin immediately. If necessary,
the charging station may need to be activated.
Follow the manufacturer guidelines and operat-
ing instructions for the charging station.
While charging
The charging display on the charging unit @) will
flash green while charging. It will pulse |} in the
instrument cluster. You can find the meaning of >
139
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High-voltage system
the possible charging display colors under
=> page 140.
The charging connector is locked while charging
and cannot be removed.
If the driver's door is opened while the ignition is
switched off, the current battery charge level and
the high-voltage battery range will be displayed
in the instrument cluster. If charging is in prog-
ress, the remaining charging time will also be
displayed.
Immediate charging and timer charging
You can switch between the immediate charging
@ and charging timer @ options during the
charging process if a charging timer is set
= page 141. Press the desired button to do this.
Ending the charging process
You can interrupt the charging process at any
time.
— Unlock the vehicle or press the @/(@) button
when the vehicle is unlocked, and the LED will
turn on.
— Remove the charging connector. If the charging
connector is not removed within 30 seconds, it
will automatically relock and the charging proc-
ess may continue.
— Put the cap back on the charging port.
— Close the charging port door.
— Disconnect the charging cable from the power
supply if necessary or return it securely to the
charging station.
— Install the protective caps on the charging ca-
ble again.
— If you are transporting the charging cable in
the vehicle, store it securely > page 144.
If the charging connector cannot be removed,
you must unlock it manually > page 142.
ZA\ WARNING
— Do not disconnect the charging cable from
the socket or the vehicle charging port while
the vehicle is charging. End the charging
process before removing the charging cable
from the socket in order to reduce the risk of
damaging the connector contacts from
sparks.
—If the charging unit is damaged, do not
charge using the charging port to reduce the
risk of injury.
— If the charging unit is damaged or the
charging port door cannot close or is miss-
ing, drive immediately to an authorized Audi
dealer or authorized Audi Service Facility
and have the malfunction corrected to re-
duce the risk of injury.
() Note
If you drive with the charging unit open, both
the charging port door and the electronics in-
stalled behind it could be damaged. Check
each time after charging if the port door is
locked before you start driving the vehicle.
@) Tips
— If the parking brake is set, it could create
noises when the charging connector is con-
nected.
— Remove ice and snow in the charging unit
using a hand brush and solvent-free deicing
spray.
— The vehicle radio and TV systems may have
limited reception when charging the vehicle.
Charging display
Applies to: vehicles with plug-in hybrid drive
The charging display is an LED light on the charg-
ing unit @) > page 139, fig. 107 that indicates
the charging status. The key for the LED light is
explained in the following table.
LED on the charging unit Meaning
Vehicle charging system is in sleep mode. A timer may be active,
Off but charging has not started yet.
Charging process is interrupted. >
140
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4N0012721BD
High-voltage system
LED on the charging unit Meaning
Pulsing The high-voltage battery is charging.
Green Flashing A timer is active, but charging has not started yet.
On High-voltage battery charging process is completed.
When using the Audi charging system, make sure the power
plug is inserted in the power socket > page 144. No power sup-
ply was recognized even though the charging cable is plugged
On in. Have the power supply or power supply system inspected.
When using the Audi charging system, check the status displays
Yellow on the unit > table on page 145. See an authorized Audi dealer
or authorized Audi Service Facility for assistance if necessary.
The vehicle is not secured from rolling away. Check if “P” is se-
lected and the parking brake is set. If the LED continues to
flash, see an authorized Audi dealer or authorized Audi Service
Facility for assistance.
Flashing
The charging connector may not be able to lock correctly in the
vehicle charging port. Check if the charging connector is insert-
ed correctly. Remove the charging connector and plug it in the
charging port again, or use a different charging station. If the
Red On LED stays turned on, there is a malfunction either in the vehicle
charging system or at the power source. See an authorized Audi
dealer or authorized Audi Service Facility for assistance if neces-
sary.
The outside temperature is too low or too high.
@ Tips > If the timer should be set one time, select Indi-
: vidual timer. If the timer should be set to re-
peat, select Repeat timer.
> Set a preferred charging time if desired, for ex-
ample to use off-peak power rates.
> To also activate the climate control with a tim-
Yad tare mans er, select CD.
Applies to: vehicles with plug-in hybrid drive > Select Next and follow the instructions in the
The operation status indicated by the LED on
the charging unit are is displayed in the in-
strument cluster Es.
menu.
> To turn ona timer, select CD.
> To activate an enabled timer, select s— until the
Timer charging mode is displayed.
Use a timer to set at what departure time your
vehicle should be fully charged. A timer can ei-
ther be set one time or to repeat at the selected
times. You can also specify if your vehicle should
be heated or cooled to the temperature set in the If the set departure time on the timer is too
climate control system. You can turn on multiple close, it may not be possible to charge the vehicle
timers at the same time. fully.
> Applies to: MMI: Select on the home screen: @ :
VEHICLE > Charging & Efficiency > Charging. Tips
It is not possible to charge using the timer at
Multiple timers are displayed that you can set peer
separately.
> To set a timer, select > in the line for the de-
sired timer.
141
Page 153 of 360

4N0012721BD
Trailer towing
Trailer towing
Driving with a trailer
General information
Your vehicle is primarily intended for transport-
ing people and luggage. However, if you drive
with a trailer, follow the technical requirements,
the operation and driving tips, and the legal reg-
ulations.
Driving with a trailer affects the vehicle's energy
usage, performance, and wear. It also requires
higher concentration from the driver.
Z\ WARNING
Do not transport any people in a trailer due to
the risk of fatal injury.
Technical requirements
Trailer hitch
Only use a trailer hitch with a removable ball
hitch mount and ball hitch. The trailer hitch must
be permitted for the vehicle, the trailer and the
permitted total weight of the trailer being
pulled. Above all, it must be securely and safely
attached to the vehicle trailer.
Never mount a trailer hitch on the bumper. The
trailer hitch must be mounted in a way that does
not impair the function of the bumper. Do not
make any changes to the exhaust system and the
brake system.
Check regularly if the trailer hitch is securely
mounted. Always follow the instructions given by
the trailer hitch manufacturer.
Trailer brakes
If the trailer has its own brake system, then fol-
low the manufacturer specifications. However,
the brake system on the trailer must never be
connected to the vehicle brake system.
Engine cooling system
Driving with a trailer means a higher load on the
engine and the cooling system. The cooling sys-
tem must be designed for additional load and
contain enough coolant > @.
CG) Note
Longer inclines cannot be driven without a
suitable cooling system, especially if the out-
side temperatures are high. Otherwise, this
increases the risk of engine damage.
Operating instructions
Towing capacity
Your vehicle can only be operated with class 1 or
class 2 trailers.
Load distribution
Poor cargo load and distribution can negatively
impact vehicle handling. Load the trailer based
on the following criteria as much as possible:
— Store objects in the vehicle luggage compart-
ment, if possible. The vehicle should always
carry the heaviest possible load and the trailer
should have the lightest possible load.
— Distribute the load in the trailer so that the
heavy objects are as close to the axle as possi-
ble.
— Secure objects so that they do not slide.
— Utilize the maximum permitted tongue weight
if possible.
Tires
Set the tire pressure on your vehicle for a “full
load”; see the tire pressure sticker > page 299. If
necessary, also adjust the tire pressure on the
trailer according to the manufacturer's specifica-
tions.
The trailer and the vehicle should be equipped
with winter tires when driving in winter tempera-
tures.
Outside mirrors
If you cannot see the traffic behind the trailer
with the standard exterior mirrors, then you
must attach additional exterior mirrors. Adjust
them so you have a sufficient visibility behind
you.
Exterior lighting
Follow the legal regulations for lighting on your
trailer that are applicable in the country where
151
>
Page 155 of 360

4N0012721BD
Trailer towing
Hill
When you start driving uphill or downhill, trailers
may tilt or sway sooner than when driving ona
level surface. If small swaying movements have
already occurred, you can stabilize the trailer by
firmly braking immediately. Never attempt to
“straighten out” the trailer by accelerating.
Conventional drive system: Downshift before
driving on hills to utilize the engine braking ef-
fect SA.
Plug-in hybrid drive: reduce the speed and use
the
recuperation braking effect > page 118 to re-
lieve the brakes > A\.
Brakes
When using a trailer with overrun brakes, first
brake gently then quickly. This reduces the risk of
jerking while braking if the trailer wheels lock up.
Engine coolant temperature
Pay attention specifically to the coolant tempera-
ture display when there are high outside temper-
atures, and when driving on long inclines
=> page 14. Shift to a higher gear in a timely man-
ner.
ZA\ WARNING
Constant braking causes the brakes to over-
heat and can substantially reduce braking per-
formance, increase braking distance, or cause
complete failure of the brake system.
153
Page 168 of 360

Driver assistance
Driver assistance
Cruise control system
Applies to: vehicles with cruise control system
The cruise control system assists the driver in
maintaining a constant speed above approxi-
mately 15 mph (20 km/h). The system maintains
the desired speed by braking and accelerating.
ZA WARNING
— Always pay attention to the traffic around
your vehicle when the cruise control system
is in operation. As the driver, you are always
responsible for controlling your vehicle
speed and the distance between your vehicle
and
other vehicles.
— For safety reasons, cruise control should not
be used in the city, in stop-and-go traffic, on
winding roads, and when road conditions are
poor (such as ice, fog, gravel, heavy rain,
and conditions that could lead to hydroplan-
ing), because this increases the risk of an ac-
cident.
— Switch the cruise control off temporarily
when driving in turning lanes, highway exits,
or in construction zones.
—To reduce the risk of an accident, you should
only resume the stored speed if it is suitable
for the current traffic conditions.
C) Note
— Conventional drive system: Before driving
downhill a long distance on a steep hill, de-
crease your speed and select a lower gear.
This makes use of the engine braking effect
and reduces the load placed on the brakes.
— Plug-in hybrid drive: Before driving downhill
a long distance on a steep hill, decrease
your speed and use the braking effect of re-
cuperation > page 118. This reduces the
load on the brakes.
@ Tips
The brake lights turn on when the brakes are
applied automatically.
166
Switching the system on
Applies to: vehicles with cruise control system
BFV-0220
Fig. 123 Lever: switching on the cruise control system
Requirement: The ignition must be switched on.
> To switch the system on, pull the lever toward
you to position @.
The Ga or 8) indicator light and the corre-
sponding message will appear in the instrument
cluster.
A WARNING
If the brakes are malfunctioning (for example,
overheating) while the cruise control system
is switched on, it may shut off automatically.
Preselecting or activating a cruise control
speed
Applies to: vehicles with cruise control system
When the vehicle is stationary, you can preselect
the cruise control speed or activate the speed
while driving.
Requirement: the system must be switched on.
> To preselect a cruise control speed when the ve-
hicle is stationary, tap the lever toward @)/C)
=> page 166, fig. 123.
> To activate the cruise control speed, pull the
lever
toward position @ while driving, or
> To set the current driving speed as the cruise
control speed, press the button @) on the lever.
The active cruise control speed is indicated with
the Gs or kl indicator light in the instrument
cluster.
An additional indicator appears in the head-up
display*.
Page 169 of 360

4N0012721BD
Driver assistance
Changing the cruise control speed
Applies to: vehicles with cruise control system
> To increase or decrease the cruise control speed
in small increments, tap the lever up to the
first level toward @)/C) > page 166, fig. 123.
> To increase or decrease the cruise control speed
in larger increments, tap the lever up to the
second level toward ()/C).
> To increase or decrease the cruise control speed
continuously, tap and hold the lever at the first
or second level toward @)/G).
Overriding or deactivating the cruise
control speed
Applies to: vehicles with cruise control system
You can override or deactivate the cruise control
system. When you deactivate the system, your
cruise control speed will be stored and you can
resume that speed.
Requirement: the system must be switched on
and activated.
Overriding
> To temporarily override the cruise control
speed, press the accelerator pedal.
> Once you release the accelerator pedal, the sys-
tem will adjust back to the stored cruise control
speed.
If you override the cruise control system for a
long period of time, the cruise control system
will be deactivated. The ICRUISE| or 88) indicator
light will be displayed and the cruise control
speed will be saved.
Deactivating
> To deactivate the cruise control speed, press
the lever toward (2) (not locked into place)
=> page 166, fig. 123.
> Press the brake pedal.
ZA WARNING
Resting your foot on the accelerator pedal
could override the cruise control. This will pre-
vent braking interventions by the system.
Seem Leal
Applies to: vehicles with cruise control system
When you switch the system off completely, the
cruise control speed will be deleted.
Requirement: the system must be switched on.
> To switch the system off, press the lever toward
@ (locked into place) > page 166, fig. 123, or
> Switch the ignition off.
Applies to: vehicles with cruise control system
Gk / 3) Speed control system: currently un-
available. See owner's manual
If the indicator light turns on and this message
appears, the cruise control system has been deac-
tivated. There is a temporary malfunction, for ex-
ample the brakes are overheating. Switch the
cruise control system on again later.
Efficiency assist
Applies to: vehicles with efficiency assist
Efficiency assist can assist the driver with predic-
tive information in order to reduce fuel consump-
tion. Depending on vehicle equipment, the sys-
tem may access data from the navigation system,
the camera behind the windshield, and the radar
sensors.
When you remove your foot from the accelerator
pedal, efficiency assist controls downhill mode
with recuperation, depending on the situation.
Adjusting the efficiency assist
You can adjust efficiency assist functions individ-
ually. The settings depend on the vehicle equip-
ment.
— Predictive messages > page 168.
— Predictive control > page 169.
— Accelerator pedal feedback > page 115.
— Interactive accelerator > page 115.
167
Page 170 of 360

Driver assistance
Situation symbols
Depending on vehicle equipment, the following
symbols may be shown. The symbols indicate the
situation to which the efficiency assist is respond-
ing.
Some symbols only appear if Predictive messag-
es are switched on, and some symbols only ap-
pear if Predictive control is switched on and
adaptive cruise assist* is active.
Description
Slow down
(predictive messages only)
Speed limit
(example)
Exit ahead
Intersection ahead
Traffic circle ahead
(predictive control only) If the indica-
tor light turns on in green and red, it
is indicating that there is a difference
between the speed limit and the set
speed.
ZA\ WARNING
— Follow the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 154.
—Incertain situations, the recuperation may
brake proactively. However, the recuperation
braking effect is limited. Always be ready to
brake to reduce the risk of an accident.
G) Tips
— The functions depend on the navigation da-
ta* being up-to-date and correct identifica-
tion by the traffic sign recognition*.
— The system only detects traffic signs that
specify a speed Limit.
— The display in the instrument cluster is
based on the units of measurement used for
speed in the country where the vehicle is be-
ing operated. As a result, a display of 50 in
168
the instrument cluster can mean either
km/h or mph, depending on the country.
— Except for the road network, which is re-
corded in the navigation system’s map infor-
mation, certain functions may not be availa-
ble.
— Certain settings are stored automatically in
the active personal profile.
Predictive messages
Applies to: vehicles with efficiency assist
The symbol BS appears in the instrument cluster
display if efficiency assist recommends removing
your foot from the accelerator pedal.
Additional symbols that indicate the situation to
which the efficiency assist is reacting are shown
in the Driver assistance display > page 168.
Requirements
— The cruise control system* or the adaptive
cruise assist* controls must not be active.
— The vehicle speed must be at least 20 mph
(30 km/h).
— The remaining distance until the situation is
reached must be large enough to allow the sys-
tem to react to the situation.
Switching messages on and off
Applies to: MMI: Select on the home screen: VE-
HICLE > Charging & Efficiency > Efficiency assist
> Predictive messages.
ZA WARNING
— Follow the safety precautions and note the
limits of the assist systems, sensors, and
cameras > page 154.
— Pay attention to traffic and the area around
your vehicle when efficiency assist is switch-
ed on. The driver is always responsible for
assessing the traffic situation.
(i) Tips
— The traffic signs on the road always take pri-
ority over the display. The driver is always
responsible for adhering to the regulations
applicable in the country where the vehicle
is being operated.