Audi A8 2019 Manual

The 2019 Audi A8 Introduction
eSelf-Study Program 990493

ii
Audi of America, LLC
Service Training
Created in the U.S.A.
Created 05/2018
Course Number 990493
©2018 Audi of America, LLC
All rights reserved. Information contained in this manual is based on
the latest information available at the time of printing and is subject to
the copyright and other intellectual property rights of Audi of America,
LLC., its aliated companies and its licensors. All rights are reserved to
make changes at any time without notice. No part of this document
may be reproduced, stored in a retrieval system, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording
or otherwise, nor may these materials be modified or reposted to other
sites without the prior expressed written permission of the publisher.
All requests for permission to copy and redistribute information should
be referred to Audi of America, LLC.
Always check Technical Bulletins and the latest electronic service repair
literature for information that may supersede any information included
in this booklet.
Revision:1-June_2018

iii
Introduction 1
Overview 2
Dimensions 4
Body 6
Introduction 6
Attachments 10
Interior equipment 12
Roof 17
Engine 18
Powertrain 19
Fuel tank 20
Exhaust system for the 3.0l TFSI engine 22
Power transmission 26
Overview 26
Automatic transmission selector mechanism 28
Parking lock emergency release 29
8-speed automatic transmission 0D5 30
Functions influencing the transmission and sport dierential 37
Suspension 40
Overview 40
Axles and wheel alignment 41
Adaptive air suspension 42
Steering system 43
Suspension 44
Wheels and tires 45
Electrics and electronics 46
Installation locations of the control modules 47
Climate control 48
New features 49
Safety and driver assistance systems 50
Passive safety 50
Active safety 68
Driver assistance systems 92
Infotainment and Audi connect 96
Overview of versions 96
Inspection and maintenance 98
Overview 98
Special tools and workshop equipment 99
Appendix 100
eSelf-Study Program 100
Knowledge assessment 101

iv
Note
Reference
The eSelf-Study Program (eSSP) teaches a basic understanding of the design and mode of operation of new models, new
automotive components or new technologies.
It is not a repair manual! Figures are given for explanatory purposes only and refer to the data valid at the time of
preparation of the SSP.
For further information about maintenance and repair work, always refer to the current technical literature.
This eSSP contains video links which you
can use to access interactive media.

1
Learning objectives of this eSelf-Study Program:
This eSelf-Study Program describes the design and function
of the 2019 Audi A8. When completed, you will be able to
answer questions about the following topics:
› 48 volt electrical system.
› New suspension features.
› New power transmission features.
› New features of the assistance systems.
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Launched in Europe in 1994, the Audi A8 was the world’s first
large volume production automobile with a self-supporting
aluminum body. Since then, Audi has built approximately one
million vehicles with the Audi Space Frame body.
Its successor continues this tradition. The design of the 2019
A8 embodies the fundamental qualities for which Audi is
renowned: sports appeal, lightweight construction and
quattro all wheel drive.
Stylistically, the new A8 marks the beginning of a new design
era for the entire brand. The front end, with its wide, upright
single frame grille and fluid muscular body symbolizes sporty
elegance, sophistication and progressiveness. The defining
design feature of the new A8 is spacious luxury. The interior
resembles a lounge of generous proportions. The interior is
deliberately minimalist with clearly defined and strictly hori-
zontal architecture.
Audi carries its high quality standards into the digital age with
a radically new operating concept. The driver operates the
infotainment system by fingertip control on a large display. A
second touchscreen display in the center tunnel console is
used to access the climate control and comfort functions as
well as making text inputs.
The 2019 A8 employees the MHEV (Mild Hybrid Electrical
Vehicle) technology based on a newly developed 48 volt elec-
trical system. The 12 volt system of the A8 is a sub-system of
the 48 volt system.
Introduction

2
Overview
Engines
3.0l V6 TFSI engine with twin-scroll turbocharger
› Maximum power: 335 hp (250 kW)
› Maximum torque: 369 lb ft (500 Nm)
› 0-60 5.7 seconds
The 2019 A8 is the first Audi to be oered as a
mild hybrid.
Suspension
The front and rear axles have a precision five-link construction (dynamic all-
wheel-drive steering is optional). The sport dierential will be available in
the future only for the S8. The adaptiveairsuspension has hydraulically con-
trolled dampers which are adjustable to fourheight levels.
A fully active Audi AI active suspension will be available at a later date. It
controls each wheel separately and allows a wide range between comfort
and sportiness.
Displays and operation
A new operating and display concept incorporating
MMI touch response technology with two touch-
screens, a switch panel (optional) and an illumi-
nated button module with tactile and audible feed-
back, intelligent handwriting entry with
whole-word and multifinger recognition.
An Audivirtualcockpit with HD resolution and
optional head-up display.
Driver assistance systems
For the first time in an Audi, a central driver assis-
tance control module (zFAS) utilizes the data from
various sensors to comprehensively map the area
around the vehicle. This map is updated continu-
ously and is used by a number of assistance func-
tions including the newly optional adaptive cruise
assist. Adaptive cruise assist combines the three for-
merly independent systems of adaptive cruise
control, Audi active lane assist with “early” correc-
tive steering point, and trac jam assist. Intersec-
tion assist helps the driver in situations where
cross-trac ahead of the vehicle can only be seen
late due to impaired visibility.
Click here for additional
information about hybrid vehicles.

3
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Electrical system
The MHEV technology of Audi is based on the newly developed 48volt elec-
trical system – it supplies the 12volt electrical system, which in this case is
the electrical subsystem. The 48-volt electrical system is powered by a belt
alternator starter (BAS) which is connected to the engine serpentine drive. A
lithium-ion battery, positioned safely under the luggage compartment floor,
serves as an energy storage device.
Power transmission
The eight-speed 0D5 transmission has been redesigned for the A8.
The rear final drive 0G2 is used on the rear axle. The quattro with sport dier-
ential drive system with the 0D3 final dierential will only be used on the S8.
Climate control
The climate control system uses R-1234yf as a refrigerant.
In the future, Carbon dioxide (CO2) will be used as a refrigerant. It is referred
to commercially as R744. It contains neither fluorine nor chlorine and is pro-
duced in a series of natural processes that reduce the possibility of depleting
the earth’s ozone layer.
Body
The body of the AudiA8 follows the AudiSpaceFrame (ASF) principle. It is
assembled from aluminum parts –the classic composite of cast nodal joints,
extruded profiles and sheet metal. The occupant cell is made from hot-
formed steel components, complemented by an ultra-high-strength, tor-
sionally rigid rear bulkhead made from carbon-fiber composite (CFC). A
magnesium dome strut completes the lightweight construction concept.

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64.7 in (1644 mm)
76.5 in (1945 mm)
58.5 in (1488 mm)
64.2 in (1633 mm)
83.8 in (2130 mm)
41.2 in(1049 mm)
46.6 in (1185 mm)
123.1 in (3128 mm)
208.7 in (5302 mm)
38.9 in (989 mm)
39.2 in (995 mm)
27.4 in (697 mm)
41.4 in (1051 mm)
1)
Dimensions
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662_075

5
33 in (840 mm)
45.6 in
(1159 mm)
59.1 in (1502 mm)3)
57.5 in (1462 mm)3)
62.2 in (1581 mm)2)
61.1 in (1553 mm)2)
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1) Maximum headroom
2) Elbow room width
3) Shoulder room width
All dimensions refer to the unladen weight of the vehicle.
Exterior dimensions and weights
Length 208.7 in (5302 mm)
Width
(not including exterior mirrors) 76.5 in (1945 mm)
Width
(including exterior mirrors) 83.8 in (2130 mm)
Height 58.5 in (1473 mm)
Front track width 64.7 in (1644 mm)
Rear track width 64.3 in (1633 mm)
Wheelbase 123.1 in (3128 mm)
Unladen weight 4287.9 lb (1945 kg)
Inner dimensions and other specifications
Front cabin width 62.2 in (1581 mm)2)
Front shoulder width 59.1 in (1502 mm)3)
Rear cabin width 61.1 in (1553 mm)2)
Rear shoulder width 57.5 in (1462 mm)3)
Load sill height 27.4 in (697 mm)
Luggage compartment
capacity
17.8 cu ft (505 l)
Drag coecient cw0.27 Cw
Capacity of fuel tank 21.7 gal (82.1 l)

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Introduction
The new Audi A8 is based on an advanced ASF body struc-
ture. With a mix of aluminum, steel, magnesium and
carbon fiber reinforced polymer (CFRP), the load-bearing
structure combines four dierent lightweight materials.
However, the largest proportion (58%) is represented by
aluminum components which, as cast nodal plates,
extruded sections and sheet metal panels, are the charac-
teristic elements of the ASF construction concept.
Note
The image shows an Audi A8 with a standard wheelbase. The body of the long-wheelbase version (A8 L) is 5.12 in (130 mm)
longer in the area of the ‘B’ pillar.
Key:
Sheet aluminum
Die-cast aluminum
Aluminum section
Ultra-high-strength steel (hot-stamped)
Carbon fiber reinforced polymer (CFRP)
Magnesium
Advanced high-strength steel
High-strength steel
Soft steel
A rear bulkhead made of carbon fiber saves approximately
50% of the weight compared with its predecessor and helps
make the body rigid and strong in addition to being light-
weight. The intelligent material mix is completed by a dome
strut which is 28% lighter and made of magnesium. Tor-
sional rigidity has been increased 24% compared to the
previous A8.
Body

7
The following connection systems are used when assembling the multi-material body:
› Resistance spot welds on steel.
› Resistance spot welds on aluminum.
› MAG welds.
› Laser welds on aluminum.
› MIG welds.
› Friction element welds.
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› Semi-tubular punch rivets.
› Pop rivets.
› Flow drill screws.
› Clinch connections.
› Seaming.
› Bonding.
Joining techniques

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The occupant cell, also called the safety cell, is made of
aluminum and conventional hot-formed steel. The cell is
comprised of the lower area of the end wall, the side sills,
the B-pillars and the front area of the roof arch.
Some of these sheet metal blanks are produced with dier-
ent thicknesses (tailored blanks) and are also partially
tempered where necessary. This reduces the weight and
increases the strength in extremely safety-critical areas.
Safety cell
The B-pillars are specially formed to enhance rigidity and
meet crash requirements. They are produced using tailor
rolled blank technology. These are flexibly rolled blanks,
where variations in sheet-metal thickness are produced by
controlled opening and closing of the gap between the
rollers. These variations in sheet-metal thickness not only
save weight, but also create defined crumple zones which
provide protection in the event of a side impact. The sheet
metal thicknesses vary between 0.06 and 0.08 in (1.5 and
2.0 mm).
Partial tempering: The individual zones of the B-pillar are
cooled in the mold at dierent rates during hot working,
giving them dierent strength characteristics. During a side
impact, the bottom section of the B-pillar deforms in order
to absorb energy. However, less deformation takes place in
the upper section of the B-pillar (at head height).
B-pillars
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Ultra-high-strength
High-strength
0.07 in (1.7 mm)
0.08 in (2.0 mm)
0.07 in (1.7 mm)
0.06 in (1.5 mm)

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An ultra high strength, torsion-resistant rear bulkhead
made of carbon fiber is the largest component of the occu-
pant cell and accounts for 33 per cent of the torsional
rigidity of the overall vehicle. To fully absorb the loads in
the longitudinal or transverse direction and shear forces,
6to 19 fiber layers are placed on top of one another for
load optimization. These individual fiber layers are com-
posed of 1.96 in (50 mm) wide bands which can be posi-
tioned individually at any fiber angle and with a minimum
cut to create a finished layer.
The carbon fiber rear bulkhead, which contains all attach-
ment points for components such as the loudspeakers, the
rear sunshade, the three-point safety belts and the rear
center armrest, is inserted into the body through the rear
window cutout during final assembly. It is connected to the
body structure using two-component strength adhesive
and rivets. The two-component adhesive prevents contact
corrosion.
Roll hemming is used all around for the entire front and
rear door sills. This process increases the door opening area
(better ingress and egress for the occupants) and improves
the field of vision in the A-pillar area.
Roll hemming is complemented by grip punch riveting
which fixes the side wall frame in its position. This is in
addition to all around structural bonding. These joining
techniques allow the aluminum side wall frame to be
mated with the hot-worked, ultra high strength sheet steel
of the B-pillar, roof arch and sill with narrow flanges.
Carbon fiber rear bulkhead
Roll hemming
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Grip punch rivet
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Roll hemming
B-pillar
Load application direction

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Fully electric door lock
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Another new feature of the A8 is the actuation of the door locks. An “e-lock” is used in which an opening signal is transmit-
ted electrically from the door inner handle or door outer handle to the door control module via a microswitch. The door
control module in turn controls an electric motor which releases the rotary latch, opening the lock. The microswitch for the
door outer handle is located in the support arm. It moves after a few millimeters of pressure on the door handle. The door
control module triggers the electric motor in the “e-lock” and the door can be unlocked with very little eort.
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Emergency release mechanism
To open the doors in the event of an electrical malfunction,
two Bowden cables are used; one from the interior door
handle and one from the exterior door handle.
To open the door from the interior, the interior door handle
must be pulled far beyond the normal “e-lock” opening
angle.
Opening the door with the exterior door handle can only be
done after the lock cylinder or interior door handle have
been actuated. The exterior door handle can then be pulled
further than the normal actuation angle and with more
force.
Door handle, support arm and door lock in the rest state.
Normal exterior door operation via the microswitch.
Interior door operation via a Bowden cable Exterior door operation via a Bowden cable
Driver Side Exterior Door Handle Switch
F546
Front Passenger Exterior Door Handle
Switch F547
Driver Side Rear Exterior Door Handle
Switch F548
Passenger Side Rear Exterior Door Handle
Switch F549
Attachments

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Door opening via the microswitch
In certain situations, for example, when another vehicle is detected within the danger zone by the exit warning system, the
“e-lock” can delay the opening of the door and issue both a visual and tactile warning for a short period of time.
Power latching
The 2019 A8 can be equipped with an optional power latching system. The drive units for this system are dierent from
previous versions. The Door Closing Aid Motors (V302, V303, V541 and V542) exert a pull via an integrated linear drive
which moves the rotary latch in the door lock to the end position.
Normal exterior door operation via the microswitch
Interior door handle in the rest state
Driver Side Interior Door Handle Switch
F550
Front Passenger Side Interior Door Handle
Switch F551
Driver Side Rear Interior Door Handle Switch
F552
Passenger Side Rear Interior Door Handle
Switch F553
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Reference
You can find further information on the electric door lock in eSelf-Study Program
970293, The 2019 Audi A8 Electrics and Electronics.
The microswitch for opening the door is located in the interior door handle. When the door control module detects the
switch being opened, it triggers the servo motor in the door lock.
Note
Before disconnecting the 12 Volt battery, make sure that one door window is open or that the ignition key is not inside the
vehicle or in the luggage compartment.

12
Interior equipment
Instrument panel
The upper trims for the instrument panel can be ordered
with various wood inlays that form the wrap-around – the
large arc that runs above the door trim panels as far as the
rear. This area contains the air vents which are covered by
these trims when not in use. When air from the climate
control system flows directly into the interior, the shutters
glide away upwards electrically while the air outlets move
out towards the driver and the front passenger.
Design
Situated to the right and left of the central 10.1" touch-
screen and around the light switch, covers with the same
black panel appearance as the display create an uninter-
rupted uniform look.
The transition between this level and the level of the air
vents is in turn covered on the right and left by a trim strip.
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Instrument panel vent
Upper trim for instrument panel
10.1" touchscreen, display unit for front information display
and Front Information Display Control Head
J685
Trim strip
Cover in black panel design
Cover in
black panel design
Trim strip
Upper trim for instrument panel
Instrument panel vent

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Front center console:
The black panel appearance of the instrument panel is continued to the center console. The transition is made through a
second, 8.6" touchscreen with an operator control module at the bottom.
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8.6" touchscreen, display
unit 2 for Front Information
Display Control Head 2
J1060
Selector mechanism
Switch Module in Instrument Panel
Center EX22
Center Console Switch Module 1
EX23

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Rear center console
The standard rear seat configuration of the A8 is a three-
seat system. A load-through hatch is also available.
An individual rear seat system without a non-folding,
continuous center console is optional. The console can be
ordered with USB ports, phone box (with wireless charging)
and SD card readers.
Irrespective of whether the long, continuous center console
or the folding center armrest is installed in the rear back-
rest, the A8 can be equipped with the Rear Seat Remote
operating concept. The Rear Seat Remote unit with its 5.7"
OLED display is similar in size to a smartphone and is
housed in the center armrest and can be removed. The Rear
Seat Remote can be used to set convenience and infotain-
ment functions in the rear. Another option is heated arm-
rests in the center armrests at the front and rear, and in the
doors.
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Buttons for seat adjustment
Folding tables
Audi phone box
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Reference
You can find further information on the Rear Seat Remote unit in eSelf-Study Programs
990293, The 2019 Audi A8 Infotainment and Audi Connect Systems and 980193, The 2019 Audi A8 Climate Control
Systems.
Wireless Control Head 1
E859
Mounting and charging cradle
for SmartRemoteControl

15
Seats
The seats of the 2019 A8 are a new design. The front seats
are approximately 8.8 lb (4.0 kg) lighter than in the prede-
cessor model. They are constructed using glass fiber rein-
forced plastic (GFRP).
Front seats
The front seats are available in several designs. The top
version is the comfort individual contour seat (PR no. Q2J).
In addition to pneumatic seat and backrest bolster adjust-
ment, it also features optional heating and ventilation,
each separately controllable in three stages. The optional
massage functions have also been extended.
Every backrest contains 16 small bubble-shaped air
pockets. They massage the entire back. For this purpose,
there is a choice of seven programs and three levels of
intensity. A small compressor for each seat delivers up to
7.25 psi (0.5 bar) pressure.
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Individual contour seat (PR no. Q2J)
Driver Multi-Contour Seat Compressor
V439
Backrest bolster
adjustment
Seat bolster
adjustment
Valve Block 1 in
Driver Seat
N475
Air cushion for
lumbar support
Massage mat
Valve Block 2
in Driver Seat
N476

16
Reclining seat
Reclining rear seats are optional on the 2019 A8 in the
Executive package. The rear passengers can move a seat to
a reclined position and place their feet on an electrically
folding area on the backrest of the special passenger seat.
If required, the feet are warmed and massaged there in
several stages. Three intensities, two programs and three
foot sizes are available.
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Rear seat
With the rear three seat system, the outer seats can be
heated as an option. The longitudinal position and the seat
and backrest angle can also be adjusted electrically. The
lumbar support can then be adjusted pneumatically.
If desired, a massage function is also available with 18
triple air pockets per seat. The individual seat system fea-
tures the same adjustment options as those in the rear
three seat system.
Foot massage Massage,
shoulder area
RearSeatRemote Massage,
back area
The entire foot reflex zones are also stimulated. The rear
passengers can lean their head on the soft comfort head
restraints in the new Kokon leather version whose height
here can be adjusted electrically. The reclining seat package
features the comfort individual contour seats with ventila-
tion and massage, the long center console with a double
folding table, the Rear Seat Remote operating unit, rear
seat entertainment and four-zone deluxe climate control.