Seat rail to floor bolt
Side bolster/sill-side trim bracket to front seat bolt
Rear Bench Seat
Mount for rear seat bench to floor bolt
Rear seat backrest to floor
taining bracket for the rear seat backrest to body nut
Individual Power Rear Seats
Bracket to left rear seat forward/back adjustment motor
bolt
Cover to lower seat frame/rear seat backrest bolt
Hook to seat cushion in the center nut
Lower seat frame/rear seat backrest to body bolt/nut
Retaining bracket to body nut
Pneumatic Components on Individual Power Rear Seat
Bracket rubber metal mount bolt to nut
Bracket rubber metal mount nut
Left rear multi-contour seat compressor nut

Nm
10
6.5
33
2.5
10
25
2.5
50
50
10
10
33
6.5
6.5
3.5
3.5
4
10
6.5
25
50
3.5
45
45
20
8
8
8
45
20
2.5
1.5
1.5

194 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Storage compartment for rear seat backrest 4)
- Bolt
- Bolt
- Nut
Multi-Contour Seat Pneumatic Components
Backrest frame to module carrier bolt
Backrest bolster inflation adjuster to backrest bolt
Driver seat multicontour seat compressor to bracket nut
1)
2)

3)

4)

Nm
2.5

1.8
8
3
3
4.5
1
8
1
6.5
1.1
3.5

Replace.
For bolt tightening clarification, refer to ElsaWeb, Seat Angle Adjustment Motor
Overview, items 2 and 3.
For bolt tightening clarification, refer to ElsaWeb, Rear Center Armrest Storage
Compartement - Vehicles with Long Wheel Base, items 2 and 5.
For bolt tightening clarification, refer to ElsaWeb, Rear Center Armrest Storage
Compartement - Vehicles with Long Wheel Base, items 7, 8, 9 and 10.

Camper Cabinets, Shelves, Water
Tank Tightening Specifications
Component
Cover for cooler bolt
Left retainer to cooler bolt/nut
Positive cable cover bolt
Right retainer to cooler bolt/nut

Nm
3
3
3
3

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 195

Body

Component
Seat frame to module carrier with air cushions for lumbar
support bolt
Center Rear Armrest
Rear center armrest to side trim bolt
Rear center armrest to body bolt/nut
Storage compartment for rear seat backrest bolt (short
wheel base)
Cover for the DVD changer bolt 3)

Heating, Ventilation & Air
Conditioning
General, Technical Data
Refrigerant Oil Distribution
Component
A/C compressor
Condenser
Suction hose
Evaporator
Fluid reservoir

Approximate % of total amount of oil in component
50
10
10
20
10

196 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

-45
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90

Pressure in bar
(positive pressure) of R134a
-0.61
-0.49
-0.34
-0.16
0.06
0.32
0.63
1.00
1.43
1.92
2.49
3.13
3.90
4.70
5.63
6.70
7.83
9.10
10.54
12.11
13.83
15.72
17.79
20.05
22.52
25.21
28.14
31.34

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 197

Heating, Ventilation
& Air Conditioning

Refrigerant R134a Vapor Pressure Table
Temperature in °C

Air Conditioning
Fastener Tightening Specifications
Component
A/C pressure/temperature sensor
Bracket for (V50) and (N82/N279)
Compressor driveshaft
Compressor drive plate
Compressor drive plate socket head bolt
Compressor mounting bolts
Compressor pulley drive plate bolt
Compressor refrigerant lines
Condenser refrigerant lines
Condenser refrigerant line bracket
Denso oil drain plug
Denso pressure relief valve
Dryer cartridge retaining bolt
Evaporator line connector
Front expansion valve retaining plate bolts
Rear expansion valve retaining plate bolts
Rear refrigerant line bracket-to-center
tunnel
Refrigerant line connection points
Refrigerant lines-to-rear expansion valve
Windshield defogger control module

Fastener
size
M6
M8
M6
M8
M6
M8

Nm

M6
M8
M6
M8
-

10
20
10
20
6

5
8
60
30
10
25
20
9
25
10
20
5
30
10
2
5
10
10
10

198 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Electrical System
Communication Equipment
Communication Tightening Specifications

1)
2)

Nm
2
1.5
4
4
3
4
4
3
4
2.5
3
3
1.3
3
1.5
1.2
4
2
3
4
3
3
3
8
6
2.5
3
1
1.2

BOSE® system only
Bang & Olufsen® system only

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 199

Electrical Equip./
Communication

Component
Antenna amplifier-to-D-pillar screw
Center speaker-to-instrument panel screw
Digital sound system control module bracket nut 2)
Digital sound system control module bracket-to-rear
panel nut 1)
Digital sound system control module bracket-to-rear
panel screw 1)
Digital sound system control module bracket-to-rear
panel screw 2)
Digital sound system control module 2 bracket-to-rear
panel nut 2)
Display mount-to-instrument panel screw
DVD changer bracket screw
Effects speaker-to-rear panel screw 1)
Effects speaker-to-rear panel screw 2)
Front bass speaker-to-front door screw
Front information display control head-to-display mount
screw
Front mid-range speaker-to-front door screw
Front treble speaker-to-instrument panel screw
Multifunction button-to-steering wheel screw
Multimedia display unit-to-bracket screw
Peripheral cameras, front, left and right
Peripheral camera, rear
Radio bracket-to-rear panel nut
Rear bass speaker-to-rear door screw 2)
Rear mid-bass speaker-to-rear door screw 1)
Rear mid-range speaker-to-rear door screw 2)
Rearview camera-to-handle button nut
Roof antenna-to-roof screw
Subwoofer-to-rear panel screw 1)
Subwoofer-to-rear panel screw 2)
Telephone baseplate-to-center armrest storage
compartment screw
Tiptronic downshift button-to-steering wheel screw

Electrical Equipment
Battery, Starter, Generator, Cruise
Control Tightening Specifications
Component
Battery jump start terminal mount
Battery positive cable-to-jump start terminal nut
Battery positive cable from battery-to-jump start terminal
nut
Battery terminal clamp nut
Generator coolant pipes retaining plate
Generator mounting bolt
Wiring harness mount1)
Terminal 30/B+ generator nut
Terminal 30/B+ starter nut
Tool kit cover retainer bolts
Voltage stabilizer nut
1)

Nm
4
8
20
6
9
23
10
16
18
18
3

For bolt tightening clarification, refer to ElsaWeb, Battery Jump Start Terminal and
Positive Terminal Overview, items 1, 2, 3 and 18.

Instruments Tightening Specifications
Component
Converter with socket (12V, 110V) screws
Instrument cluster-to-instrument panel
Luggage compartment 12 V outlet trim panel nut
Signal horn bracket-to-body
Signal horns-to-bracket

Nm
1.2
3
2
11
11

Windshield Wiper/Washer Tightening Specifications
Component
Washer fluid hose-to-left spray nozzle and night vision
camera
Washer fluid reservoir-to-body
Wiper arm-to-wiper axle nut

Nm
4
7
21

200 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Windshield Wiper Motor Tightening Sequence

Step
1
2

Component
Tighten bolts 1 through 3 in sequence
Tighten bolts 1 through 3 in sequence

Nm
Hand-tighten
8

Exterior Lights, Switches Tightening Specifications
Nm
4.5
4
0.9
4.5
4.5
1.2
1.2
1.4
6
2
1.5
1.5
1
3
3.5
0.5

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 201

Electrical Equip./
Communication

Component
Adjusting element for adjusting the headlamp housing-tothe bumper contour screw
Clamping Ring for Steering Column Screw
Exterior rear view mirror turn signal bulb screw
Headlamp housing bracket
Headlamp housing bracket screw
Headlamp housing cover
HID headlamp control module
HID headlamp power output stages screw
Inner tail lamp nut
Lamp Socket for Back-Up Light Screw
LED power output stages screw
LED retaining frame
License plate light screw
Mount for Access/Start Authorization Switch
Outer tail lamp
Steering column electronic systems control module
screw

Housing Cover With Power Output Stage 1
for Led Headlamps Tightening Sequence

Step
1

Component
Tighten bolts 1 through 4 in sequence

Nm
1.5

202 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Housing Cover Tightening Sequence

Component
Tighten bolts 1 through 4 in sequence

Nm
1.5

Electrical Equip./
Communication

Step
1

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 203

Headlamp Fan - Tightening Tightening Sequence

Step
1

Component
Tighten bolts 2, 4 and 6 in sequence

Nm
1

Interior Lights, Switches Tightening Specifications
Component
Alarm horn nut
Driver memory seat control head
Electromechanical parking brake button -AUTO HOLDbutton
Front interior lamps/reading lamps
Interior access/start authorization antenna 2 nut
Lane change assistance control module screw
Lane change assistance control module 2 screw
Left access/start authorization antenna screw
Luggage compartment access/start authorization
antenna nut
Rear seat adjustment control head assembly
Roof Electronics Control Module -J528
Selector Lever Transmission Range Position Display Unit
-Y26- with Selector Lever Illumination Bulb -L101Steering column adjustment switch/steering wheel
heating button
Sunroof button

Nm
7
2
2.5
4.5
2
3.5
3.5
1
2
2
0.8
0.2
1
0.8

204 Audi A8/A8L/S8 Quick Reference Specification Book • September 2013

Wiring Tightening Specifications
Nm
4
20
4
4
3.5
3
4
3
3

Electrical Equip./
Communication

Component
2-pin relay/fuse panel, right A-pillar screw
Battery jump start pin for negative terminal clamp
Control modules retaining frame nut
Data bus OBD interface nut
E-Box cover screw (in plenum chamber, right side)
E-Box nut (in plenum chamber, right side)
Fuse panel F nut
Fuse panel screw
Vehicle electrical system control module mount nut

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 205

Fuse Panel Tightening Specifications

Item
1
2
3
4