Mercedes-Benz ML320. Manual — part 638

GF54.30-P-2017A

HHT interface, location/task

7.7.99

MODEL

129, 140 as of 1.6.96,

163, 168, 170,
202 as of 1.8.96,
208 up to 31.7.99,
210 as of 1.6.96 up to 30.6.99

The instrument cluster has diagnostic capabilities. In other words,
diagnosis is possible using a hand held test (HHT). The instrument
cluster therefore has a line (K-line) which is connected to the data
link connector (X11/4).

The instrument cluster, including the Active Service System
(ASSYST), is tested with the HHT. The following functions can be
selected:
D Control module version
D Error memory
D Actual valves
D Controls
D Manual transmission adaptation: - variant coding

- settings

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AD00.00-P-2000-03C

Connect hand-held tester (HHT), read out
diagnostic trouble code memory

Model 163 up to 31.08.01

Model 168

Workshop equipment/MB testers (see Workshop Equipment Manual)

WE58.40-Z-1001-06A

Hand-held tester (HHT), order number 6511 0001 99

WE58.40-Z-1002-06A

Test cable (multiplexer)

WE58.40-Z-1009-06A

Adapter cable (HHT) for test connector (X11/4, 16-pin), order number 6511 0090 99

P42.35-0234-06

1

Connect hand-held tester (087) to
diagnosis test connector (X11/4) in
interior using test cable (multiplexer)
(094) and adapter cable (107) .

2

Switch on ignition.

3

According to instructions in display :
a) Read out/erase fault memory
b) Read out actual values
c) Perform actuations
d) Program control modules

4

Disconnect HHT.

087

Hand-held tester (HHT)

094

Test cable (multiplexer)

107

Adapter cable (HHT) for datalink
connector (X11/4, 16-pin)

X11/4 Diagnostic data link connector

Note system-specific deviations listed in respective diagnosis

description in chapter entitled "Diagnosis Previous Knowledge".

Stored faults possibly caused by cables being disconnected during
testing or by simulation must be erased from the fault memory once
the work is completed.

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AD54.30-P-2000-02GC

Notes on HHT previous knowledge diagnosis
IC

HHT :

The instrument cluster and active service system (ASSYST) sub-
function are checked with HHT, there being the choice of the
following functions for this:

1. Control module version
2. Fault memory
3. Actual values
4. Actuations
5. Control module adaptation

Additional information on test items 2, 3 and 5 can be called up using
the INPUT key

Control module adaptation

The following alternatives are available in the HHT under control
module adaptation:

1.)

Read out coding and transfer to new instrument cluster. IC and
ASSYST.

2.)

Read out/change codings e.g.:

Engine and national variants,
version of fuel tank,
special equipment etc.

3.)

Settings:

1

Clock

2

Put forward kilometer reading

3

Put back kilometer reading

4

Oil change

5

Reset oil change initiated inadvertently

6

Active Service System

7

Enter times with battery disconnected

8

Set minimum oil warning

Before replacing a defective instrument cluster, readout the existing
variant codings (driving data and instrument cluster data) and store in
the HHT on an interim basis. Read in the values stored on an interim
basis again after installing the new instrument cluster.

If it is not possible to read out the stored variant coding, all variant
codings must be input manually (menu-assistance in HHT).

When installing an instrument cluster on an experimental basis, do
not put forward the kilometer reading as it cannot be put back later.

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AP82.10-P-8260GH

Check and correct headlamp adjustment

2.7.97

MODEL

163

a=Marking for low beams
b=Marking for high beams
c=Marking for fog lamps

P82.10-0212-02

Check

1

Drive vehicle to level surface

The vehicle level must not change when the
brakes are applied.

Vehicle must be in ready-for-the-road
condition (unladen weight, fuel tank full or
proper additional weight).

Correctly adjust tire pressure.

Load driver's seat with 75 kg or a person
(except USA)

2

Align headlamp adjustment tester to vehicle
and adjust height according to marking in lens

Follow the operating instructions for

headlamp beam setting equipment exactly

*WH58.30-Z-1002-09A

Danger!

Risk of accident from vehicle starting off by
itself when engine running. Risk of injury
suffered in the form of bruises or burns to the
hands when reaching in while the engine
cranks or runs

Secure vehicle to prevent it from moving off
by itself.
Wear closed and close-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

3

Run engine and switch on low beam

4

Check headlamp range control for proper
function

(except USA)

The light beams from both headlamps should
change uniformly

5

Set headlamp range control switch to position 0

6

Check low beams

Adjust if necessary (except USA)

AP82.10-P-8260-01A

Due to the common reflector unit, the low
beams, high beams and fog lamps are
adjusted simultaneously.

US version:

#

See "Owner's Manual"

7

Check high beam adjustment

AP82.10-P-8260-02A

8

Check fog lamps

AP82.10-P-8260-04A

Commercially available tools (see Workshop Equipment Manual)

Number

Designation

Make (e.g.)

Order number

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