Mercedes-Benz ML320. Manual — part 817

AR46.10-P-0100GH

Removing and installing steering wheel

1.3.97

MODEL

163.113 /128 /136 /154 /157 /172 /174 /175

P46.10-0449-11

P46.10-0450-01

P46.10-0458-01

P46.10-0459-01

Modification notes

10.9.03

Connecting quiescent current retention unit deleted

Step 1

10.9.03

Reference to adjusting toe on front axle replaced by
reference to chassis alignment check

Step 10

Removing, installing

Danger!

Risk of explosion caused by explosive gas.
Risk of poisoning and caustic burns
caused by swallowing battery electrolyte.
Risk of injury caused by burns to skin and
eyes from battery acid or when handling
damaged lead-acid batteries

No fire, sparks, open flames or smoking.
Wear acid-resistant gloves, clothing and eye
protection. Pour battery electrolyte only into
suitable and appropriately marked containers.

AS54.10-Z-0001-01A

Danger!

Risk of injury when carrying out test or repair
work on airbag or emergency tensioning
retractor units

Store airbag units with deployment side facing
up; do not expose to temperatures greater
than 100 °C. When working on these units,
disconnect the power supply.

AS91.00-Z-0001-01A

Legal provisions concerning handling and
storage of airbag and emergency tensioning
retractor units

AH91.00-P-0004-01A

o

Notes on disposing of airbag and emergency
tensioning retractor units

OS91.00-P-0001-01A

1

Disconnect ground cable from battery

Protect the ground cable to prevent

unintentional contact with the battery ground
terminal.

AR54.10-P-0003A

Notes on battery

AH54.10-P-0001-01A

2

Remove airbag unit (120) from steering wheel
(32)

AR91.60-P-0660GH

Instructions for performing repair, body work
and welding on vehicles with airbags and
ETR units

AH91.00-P-0002-01B

3

Unplug connectors (38b, 38c) for horn

4

Turn steering wheel (32) to horizontal position
(front wheels in straight-ahead position)

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5

Remove key and engage steering lock

6

Unscrew bolt (32c)

Hold the steering wheel (32).

Installation: Replace bolt (32c).

*BA46.10-P-1001-02A

7

Pull off steering wheel (32)

Pass cables carefully through the openings.

Installation: Align recesses of the splines

in the steering wheel with the markings on the
steering shaft (arrows).

8

Check fanfare horns and airbag clock spring
contact (A45) for damage

The clock spring contact must not be

turned while the steering wheel is removed
otherwise it will be damaged.

Visual inspection, replace clock spring

contact if necessary:

#

Removing and installing clock spring contact

AR46.10-P-0200GH

9

Install in the reverse order

10

Carry out road test

Tests during the road test:

Turn signal canceling:

When the steering wheel is offset by

more than 1 tooth, satisfactory resetting of the
turn signal is no longer guaranteed.

Airbag indicator lamp:

The SRS indicator lamp must not light up

on full steering lock in both directions.

Steering wheel position:

If the steering wheel is crooked, adjust it

by max. 1 tooth. If the difference is greater:

#

Check toe on front axle and adjust if
necessary, see:

#

Performing chassis alignment check

AR40.20-P-0200A

Steering wheel

Number

Designation

Model 163

BA46.10-P-1001-02A

Bolt, steering wheel to steering shaft

Nm

80

Copyright DaimlerChrysler AG 09.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

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GF54.30-P-3009A

Stepper motor, location/design/function

7.7.99

MODEL

129, 140 as of 1.6.96,

163, 168, 170,
202 as of 1.8.96,
208,
210 as of 1.6.96,
215, 220

P54.30-0521-06

General
Stepper motors are motors which, like most
electric motors, consist of a fixed stator and a
moveable rotor. The rotary motion is not
continuous, rather the rotor turns in steps, a
certain angle at a time, for example 90°.

Design
The illustration shows the basic design of a
stepper motor with 1 pole pair and 2 phases.
The stator is made of magnetically soft iron
and holds the windings. Opposite windings
belong together and form a phase (in this
case, a and b). The rotor consists of a
permanent magnet. In the illustration the rotor
has 1 pole pair.

Function
The rotor is turned by applying current
through phase aor b (see illustration). The
magnetism in the stator changes according to
the polarization (I) of the phases.

The rotor will turn so that its south pole (S) is at the north pole (N) of
the stator and its north pole (N) is at the south pole (S) of the stator.
The illustration shows a full rotation of the rotor. The rotor moves in
steps of 90° from positions 1 through 4 and back to its starting
position.
Unlike normal electric motors, the motor can stop in each of these
positions with a certain holding torque. This type of motor is therefore
particularly suitable for use as a servomotor for exact positioning.

The size of the steps can be reduced considerably by increasing the
number of pole pairs and phases.
Theoretically, it is even possible to make the steps infinitely small
with just a few poles and phases by using complicated electronic
phase control (sine-cosine control).

Stepper motors (with sine-cosine control) are used, for example, for
pointing instruments in the instrument cluster (A1).

Copyright DaimlerChrysler AG 04.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

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BT27.35-P-0004-01A

Strainer for modulating pressure and shift
pressure control solenoid valve, new

Transmission 722.6

k

TRANSMISSION

722.6## ## as of 0538312

P27.35-0248-06

70

Strainer

Strainer to protect against dirt and metal
shavings for the modulating pressure and
shift pressure control solenoid valves in the
valve housing.
As a result also new control solenoid valves
with a new part number.

Copyright DaimlerChrysler AG 28.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

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