-

Stabilizer bar-to-subframe nut 1) 4)
Subframe crossbrace-to-subframe bolt 1)

-

Subframe-to-body bolt 1) 2)

-

Tie rod end-to-wheel bearing housing nut 1)
Tower brace mounting bolt 6)

-

Track control arm-to-subframe nut 1) 3)
Upper control arm-to-suspension strut
dome bolt 1) 3)

-

Upper control arm-to-wheel bearing
housing nut 1)
Wheel bearing-to-wheel bearing housing
bolt 1)

-

1)
2)
3)

4)
5)
6)

-

Nm
120
9
9
200 plus an
additional 180°
(½ turn)
9
23
90 plus an
additional 90°
(¼ turn)
35
90 plus an
additional 180°
(½ turn)
115 plus an
additional 90°
(¼ turn)
130
10
25
50
70 plus an
additional 180°
(½ turn)
50 plus an
additional 90°
(¼ turn)
40
80 plus an
additional 90°
(¼ turn)

Replace fastener(s).
Remove and tighten diagonally and in steps.
For bolt tightening clarification, refer to ElsaWeb, Wheel Bearing, Raising to Control
Position to Tighten Bolts.
Remove and install the nuts alternating from side to side.
Tighten in the curb weight position.
For bolt tightening clarification, refer to ElsaWeb, Air Spring Damper, Shock
Absorber Fork, Upper Control Arm and Tower Brace Overview, items 3, 4 and 6.

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 169

Suspension,
Wheels, Steering

Component

Rear Suspension
Fastener Tightening Specifications
Component
Air spring damper boot clamp
Air spring damper-to-body nut 1) 4)
Air spring shock absorber-to-wheel bearing
housing bolt 1)

Fastener
size
-

Brace-to-subframe bolt
Brake disc cover plate-to-wheel bearing
housing bolt
Brake disc-to-wheel hub bolt
Constant Velocity (CV) joint boot clamp
Coupling rod-to-lower transverse link bolt

-

Coupling rod-to-stabilizer bar bolt 1) 2)

-

Drive axle-to-rear final drive bolt
Drive axle-to-wheel hub collar bolt 1)

M10
-

1) 2)

-

Level control system sensor bolt
Lower transverse link-to-subframe bolt 1) 2)

-

Lower transverse link-to-wheel bearing
housing bolt 1) 2)

-

Stabilizer bar-to-subframe bolt 1) 3)

-

Subframe-to-body bolt 1)

-

Tie rod-to-subframe nut 1) 2)
Tie rod-to-wheel bearing housing bolt 1) 2)

-

Upper transverse link-to-subframe bolt 1) 2)

-

Nm
8
30
100 plus an
additional 180°
(½ turn)
17
10
5
20
40 plus an
additional 90°
(¼ turn)
40 plus an
additional 90°
(¼ turn)
70
200 plus an
additional 180°
(½ turn)
9
70 plus an
additional 180°
(½ turn)
120 plus an
additional 360°
(1 full turn)
25 plus an
additional 90°
(¼ turn)
115 plus an
additional 90°
(¼ turn)
95
90 plus an
additional 90°
(¼ turn)
70 plus an
additional 180°
(½ turn)

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

Upper transverse link-to-wheel bearing
housing nut 1) 2)
Wheel bearing-to-wheel bearing housing
bolt 1)
1)
2)
3)
3)

Fastener
size
-

Nm

-

80 plus an
additional 90°
(¼ turn)

95

Replace fastener(s).
Tighten in the curb weight position.
Tighten evenly.
Tighten diagonally.

Self-Leveling Suspension
Fastener Tightening Specifications
Component
Air spring damper connecting piece
Air supply unit connecting piece
Air supply unit-to-bracket threaded sleeve
Air supply unit-to-retainer bolt
Bracket to spare wheel well nut
Muffler nut
Pressure reservoir bolt
Pressure reservoir connecting piece
Solenoid valve block-to-bracket bolt
Solenoid valve connecting piece
Spare wheel well bracket nut
Spare wheel well cover nut
Stone chip protective molding nut
Wiring connector connecting piece

Fastener
size
10 mm
12 mm
-

Nm
3
3
7.5
9
9
5
9
5
3.5
2
3
9
2.5
9
5

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 171

Suspension,
Wheels, Steering

Component

Wheels, Tires
Fastener Tightening Specifications
Component
Active steering control module bracket nut
Active steering control module to bracket
bolt
Distance regulation control module bracket
bolt
Night vision camera-to-retaining plate bolt
Night vision camera retaining plate-tobumper bolt

Fastener
size
-

Nm

-

2.5

-

5
6

2.5
8

Wheel Alignment Data
Wheel Alignment Specified Values
The specified values are for all vehicles except those equipped with an
8-cylinder TDI or 12-cylinder FSI engine
Front Axle
Camber
Maximum
permissible
difference
between both
sides
Toe per wheel
(adjustment
value)
Toe per wheel
(control value)
Toe differential
angle at 20° 1)
Outer wheel
steering angle
at maximum
steering angle
Inner wheel
steering angle
at maximum
steering angle
1)

Standard
suspension
(1BK)
- 56′± 23′
30′

Sport
suspension
(2MA/2MB)
- 1°7′± 23′
30′

Heavy duty
suspension
(1BY)
- 48′± 23′
30′

+ 10′ ± 5′

+ 10′ ± 5′

+ 10′ ± 5′

+ 10′ ± 6′

+ 10′ ± 6′

+ 10′ ± 6′

1° 49′ ± 30′

1° 49′ ± 30′

1° 49′ ± 30′

33° 24′ + 1° 30’- 2°

33° 24′ + 1° 30’- 2°

33° 24′ + 1° 30’- 2°

39° 48′ + 1° 30’- 2°

39° 48′ + 1° 30’- 2°

39° 48′ + 1° 30’- 2°

The wheel stop on the outer wheel is reduced by this amount. Depending on the
computer manufacturer, the toe-out angle difference can be indicated negatively in
the alignment computer.

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

Camber
Maximum
permissible
difference
between both
sides
Toe for each
wheel
Total toe
Maximum
permissible
deviation in
direction of travel
relative to vehicle
longitudinal axis

Standard
suspension
(1BK)
- 1°15′ ± 25′
30′

Sport
suspension
(2MA/2MB)
- 1°20′ ± 25′
30′

Heavy duty
suspension
(1BY)
- 1°15′ ± 25′
30′

+ 12′ ± 5′

+ 12′ ± 5′

+ 12′ ± 5′

+ 24′ ± 10′
10′

+ 24′ ± 10′
10′

+ 24′ ± 10′
10′

The specified values are for vehicles equipped with a 12-cylinder FSI engine.
Front Axle
Camber
Maximum
permissible
difference
between both
sides
Toe per wheel
(adjustment
value)
Toe per wheel
(control value)
Toe differential
angle at 20° 1)
Outer wheel
steering angle
at maximum
steering angle
Inner wheel
steering angle
at maximum
steering angle
1)

Standard
suspension
(1BK)
- 56′± 23′
30′

Sport
suspension
(2MA/2MB)
- 1°7′± 23′
30′

Heavy duty
suspension
(1BY)
- 48′± 23′
30′

+ 12′ ± 5′

+ 12′ ± 5′

+ 12′ ± 5′

+ 12′ ± 6′

+ 12′ ± 6′

+ 12′ ± 6′

1° 49′ ± 30′

1° 49′ ± 30′

1° 49′ ± 30′

33° 24′ + 1° 30’- 2°

33° 24′ + 1° 30’- 2°

33° 24′ + 1° 30’- 2°

39° 48′ + 1° 30’- 2°

39° 48′ + 1° 30’- 2°

39° 48′ + 1° 30’- 2°

The wheel stop on the outer wheel is reduced by this amount. Depending on the
computer manufacturer, the toe-out angle difference can be indicated negatively in
the alignment computer.

Audi A8/A8L/S8 Quick Reference Specification Book • September 2013 173

Suspension,
Wheels, Steering

Rear Axle

Wheel Alignment Specified Values (cont'd)
Rear Axle
Camber
Maximum
permissible
difference
between both
sides
Toe for each
wheel
Total toe
Maximum
permissible
deviation in
direction of travel
relative to vehicle
longitudinal axis

Standard
suspension
(1BK)
- 1°15′ ± 25′
30′

Sport
suspension
(2MA/2MB)
- 1°20′ ± 25′
30′

Heavy duty
suspension
(1BY)
- 1°15′ ± 25′
30′

+ 12′ ± 5′

+ 12′ ± 5′

+ 12′ ± 5′

+ 24′ ± 10′
10′

+ 24′ ± 10′
10′

+ 24′ ± 10′
10′

Steering
Fastener Tightening Specifications
Component
Belt Pulley to Power Steering Pump Bolt (6-Cylinder)
Belt pulley-to-power steering pump bolt (12-cylinder)
Electro-Mechanical Steering Gear with Tie Rods 1)
- Bolt to subrame
- Nut to wheel bearing housing
Electronic steering column lock control module-tosteering column bolt
Hose and line-to-body mounting bolt
Hydraulic fluid cooler bolt

Nm
22
23
80 plus an
additional 180°
(½ turn)
100
5
9
4.5
5
9
5

Lower reservoir-to-body bolt
Power adjustable steering column control module-tosteering column bolt
Power assisted steering gear with tie rods-to-wheel
130