Mercedes-Benz ML320. Manual — part 780

GF54.30-P-3017A

Quartz, location/task/function

8.7.99

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

P54.30-0519-01

Piezo-electric effect:
A thin quartz plate (c) is coated on two opposing sides with a conductive material (a), (b) (see
illustration). If a tensile or compressive load is applied to the array, an electrical voltage "U" is
produced between the points (d) and (e). The polarity of the generated voltage depends on the
direction of load (compression/tension).

Reversed piezo-electric effect:
If, however, a voltage is applied to the points (d) and (e), the quartz plate increases or decreases
in length.

Task:
Mechanical vibrations can be converted into electrical oscillations using the piezo-electric effect.
For example, for microphones, knock sensors, pressure sensors.
Electrical oscillations can be converted into mechanical vibrations or motion using the reversed
piezo-electric effect: piezo-electric speakers, actuators.
Both effects are combined in the quartz resonator: If an AC voltage whose frequency is roughly
equal to the mechanical resonant frequency (fundamental or harmonic component) of the quartz
plate is applied to the points (d) and (e), the quartz is stimulated to generate resonant vibrations
which stabilize the frequency of the electrical oscillations. For this reason, quartz resonators are
often used where a high degree of frequency stability is required (e.g. in clock generators
(oscillators) for electronic clocks and microprocessors).

Copyright DaimlerChrysler AG 05.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

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AR46.20-P-0600GH

Removing and installing rack-and-pinion steering

1.3.97

MODEL

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

P46.20-2126-09

Shown on model 163.154 (vehicles
without speed-sensitive power steering)

1

Front axle carrier

10a Tie rod joint
21

Rubber mount

25d Nut
25f

Steering coupling shield

30f

Return line

30i

High-pressure expansion hose

80a Lower steering shaft

23

Rack-and-pinion steering

23a Bolts
23h Shim
23i

Shim

25

Steering coupling

Modification notes

10.9.03

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

Step 16.1

Removing, installing

Danger!

Risk of fatal injury if the vehicle slips or
topples off the lifting platform

Align vehicle between the columns of the
lifting platform and position the four support
plates at the lifting platform support points
specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

Danger!

Risk of injury with trapped or crushed
fingers when removing and installing or
aligning hoods, doors, trunk lid/tailgate and
sliding roof.

When moving components ensure that no
body parts or limbs are in the area of
movement.

AS00.00-Z-0011-01A

1

Open engine hood

AR88.40-P-1000GI

2

Extract oil from power steering pump supply
reservoir

Hand pump

*210589007100

3

Raise vehicle

4

Remove front axle gear

AR33.30-P-0525GH

5

Press tie rod joints (10a) off steering knuckles

Installation: Replace self-locking nuts.

AR46.40-P-0200-02C

*BA46.40-P-1001-01C

Thrust piece

*140589006300

Puller

*202589023300

6

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

7

Remove key and engage steering lock

8.1

Unplug speed-sensitive power steering
connector from timing case

On vehicles with speed-sensitive power
steering code 213a

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Page 1

9

Detach return line (30f) and high-pressure
expansion hose (30i)

Connection fittings or banjo bolts

depending on the version. Seal off line
connections with plugs.

Installation: Replace sealing rings.

Connection fitting, return line

*BA46.20-P-1001-01D

Connection fitting, high-pressure

expansion hose

*BA46.20-P-1002-01D

Banjo bolt, return line

*BA46.20-P-1004-01D

Banjo bolt, high-pressure expansion hose

*BA46.20-P-1005-01D

Plug

*129589009100

10

Detach nut (25d) and bolt from steering
coupling (25) and pull lower steering shaft
(80a) upwards out of steering coupling (25)

Do not use force as the corrugated tube is

sensitive to lateral forces. Enlarge clamping
groove a little with a screwdriver if necessary.

Installation: Replace nut (25d).

Installation: Turn rack-and-pinion

steering to center position and fit steering
coupling.

AR46.20-P-0600-01GH

*BA46.10-P-1001-01D

11

Detach rack-and-pinion steering (23) from
front axle carrier (1) by unscrewing bolts (23a)

The installed position of the shims (23h,

23i) on the right-hand side, between the
rubber mount and the front axle carrier, must
be observed as the shims are of different
thicknesses.

Installation: Attach rack-and-pinion

steering to front axle carrier.

AR46.20-P-0600-03GH

Assessing condition of steering gear when
repairing accident vehicles

AH46.20-P-9409-01A

12

Check rubber mount (21) of rack-and-pinion
steering mounting for damage

Replace rubber mount if necessary:

#

Removing rubber mounts on rack-and-pinion
steering mounting

AR46.20-P-0600-02GH

13

Install in the reverse order

14

Fill and bleed power steering pump

Engines 112, 113

AR46.30-P-0010B

Engines 111, 612, 628

AR46.30-P-0010P

15

Check steering for function and leaks

There is a grease cushion under the cover

cap. A small amount of escaping grease is to
be regarded as normal and must not be
confused with leakage.

16.1

Check toe on front axle and adjust if necessary When installing a new rack-and-pinion

steering, see:

#

Performing chassis alignment check

AR40.20-P-0200A

Steering shaft

Number

Designation

Model 163

BA46.10-P-1001-01D

Self-locking nut, steering coupling to steering shaft
and rack-and-pinion steering

Nm

28

Steering gear

Number

Designation

Model 163

BA46.20-P-1001-01D

Screwed connection fitting from return line
to rack-and-pinion steering

Nm

15

BA46.20-P-1002-01D

Screwed connection fitting from high-
pressure expansion hose to rack-and-pinion
steering

Nm

15

BA46.20-P-1003-01D

Bolted connection, rack-and-pinion steering
to front axle carrier

Nm

50

BA46.20-P-1004-01D

Banjo bolt, return line to rack-and-pinion
steering

Nm

30

BA46.20-P-1005-01D

Banjo bolt, high-pressure expansion hose to
rack-and-pinion steering

Nm

30

Copyright DaimlerChrysler AG 06.07.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 2

Tie rod

Number

Designation

Model 163

BA46.40-P-1001-01C

Self-locking nut, tie rod to steering knuckle

Nm

55

202 589 02 33 00

Thrust piece

Puller

Hand pump

210 589 00 71 00

140 589 00 63 00

Set of plugs

129 589 00 91 00

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