SSP 625 - EN - Audi A3 saloon.pdf

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Self Study Programme 625
For internal use only
Audi A3 saloon
Audi
Service Training
The sporty A3 saloon marks Audi's entry into the world's largest
market segment, the compact four-door class.
The third model in the successful A3 series features lightweight
design, powerful and highly efficient engines, not to mention a
number of high-end infotainment solutions and driver assistance
systems. The Audi A3 saloon is the first notchback model from
Audi in the compact premium segment and cuts an exceedingly
sporty figure.
The design of the Audi A3 saloon combines classic notchback
styling with the dynamics of a convertible. The flat roof line termi-
nates at the C post and merges seamlessly with the shoulder line.
The tornado line is a prominent contour edge and the wheel arches
are flared to give a muscular look. The large round air vents, the
three-dimensional decorative inlays and the air conditioner’s
elegant control panel are testimony to the attention to detail that
Audi devotes to every vehicle.
The large boot can be extended by folding down the rear seat
backs. The sporty four-door model with its elegantly contoured
notchback has all the strong-points of the successful A3 series.
Production at the Györ plant
The Audi A3 saloon and the S3 saloon are manufactured at the
Győr plant in northwestern Hungary - the world's largest engine
plant - where Audi has been assembling the TT Coupé, Roadster
and A3 Cabriolet for a number of years now. The company has built
in Györ a state-of-the-art automobile factory with a complete
process chain. All stages in the production process – from pressing
the sheet metal to final assembly – take place in an area covering
250,000 m
2
.
625_002
2
Contents
Introduction
In brief _______________________________________________________________________________________________________________________________________________________ 4
Body
Introduction _________________________________________________________________________________________________________________________________________________ 6
Attachments _________________________________________________________________________________________________________________________________________________ 8
Joining technology __________________________________________________________________________________________________________________________________________ 8
Effects of accident safety requirements on the body structure _______________________________________________________________________________________ 10
Vehicle architecture (MQB) ________________________________________________________________________________________________________________________________ 11
Underbody __________________________________________________________________________________________________________________________________________________ 11
Passive safety
Components ________________________________________________________________________________________________________________________________________________ 12
System overview ___________________________________________________________________________________________________________________________________________ 13
In-car airbags _______________________________________________________________________________________________________________________________________________ 14
Sensors ______________________________________________________________________________________________________________________________________________________ 17
Front automatic belt retractor ____________________________________________________________________________________________________________________________ 21
Lap belt tensioner with buckle ____________________________________________________________________________________________________________________________ 22
Pedestrian protection ______________________________________________________________________________________________________________________________________ 26
Active safety
Audi pre sense ______________________________________________________________________________________________________________________________________________ 30
Engines
Engine/gearbox combinations ____________________________________________________________________________________________________________________________ 36
Petrol engines (China) _____________________________________________________________________________________________________________________________________ 38
Diesel engines ______________________________________________________________________________________________________________________________________________ 44
Exhaust system _____________________________________________________________________________________________________________________________________________ 47
Fuel system with SCR system _____________________________________________________________________________________________________________________________ 51
Suspension
Overall concept _____________________________________________________________________________________________________________________________________________ 54
Suspension/steering versions _____________________________________________________________________________________________________________________________ 56
Low tyre pressure indicator _______________________________________________________________________________________________________________________________ 56
Wheels and tyres ___________________________________________________________________________________________________________________________________________ 57
Electrical system
Installation locations of control units ___________________________________________________________________________________________________________________ 58
Topology ____________________________________________________________________________________________________________________________________________________ 60
Air conditioning
Air conditioning system versions _________________________________________________________________________________________________________________________ 62
Infotainment
Overview of versions _______________________________________________________________________________________________________________________________________ 64
LTE ___________________________________________________________________________________________________________________________________________________________ 66
Aerials overview ____________________________________________________________________________________________________________________________________________ 68
Sound systems _____________________________________________________________________________________________________________________________________________ 72
Map update service ________________________________________________________________________________________________________________________________________ 73
TV tuner _____________________________________________________________________________________________________________________________________________________ 74
Service
Inspection and maintenance ______________________________________________________________________________________________________________________________ 76
Special tools and workshop equipment __________________________________________________________________________________________________________________ 78
Self Study Programmes ___________________________________________________________________________________________________________________________________ 79
The Self Study Programme teaches a basic knowledge 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. This content is not updated.
For further information on maintenance and repair work, always refer to the current technical literature.
Note
Reference
3
Introduction
In brief
This Self Study Programme describes the modifications distin-
guishing the A3 ’13 from the A3 saloon. Several Self Study Pro-
grammes describing the design and mode of operation of the
A3 saloon have been prepared for this purpose.
You will find a list of the Self Study Programmes at the end of this
Self Study Programme.
Dimensions
1416
942
1555
1796
625_036
1555
1796
625_037
100
6
3
924
869
2637
4456
950
625_038
4
688
1392
1
1453
2
1423
2
1345
1
951
1000
625_039
Dimensions and weights
Length
in mm
Width
in mm
Height
in mm
Track width, front
in mm
Track width, rear
in mm
Wheelbase
in mm
Trailer load
in kg
with brake at a gradient of 8 %
Kerb weight
in kg
Max. gross weight
in kg
4456
1796
6)
1416
1555
1526
2637
1800
4)
1315
4)
1865
Cabin width, front
in mm
Cabin width, rear
in mm
Headroom, front
in mm
Headroom, rear
in mm
Through-loading width
in mm
Load sill height
in mm
Boot capacity
in l
Capacity of fuel tank
in l
Drag coefficient
in c
w
1453
1423
1006
924
1000
688
425/880
5)
50
0.29
Shoulder room width
Elbow room width
3)
Maximum headroom
4)
with a 2.0l TDI engine developing 110 kW at 320 Nm
5)
with the rear backrest folded down
6)
excluding mirror
1)
2)
All dimensions are given in millimetres and refer to the unladen weight of the vehicle.
5

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