Mercedes-Benz ML320. Manual — part 639

WH58.30-Z-1002-09A

Headlamp adjuster

Robert Bosch GmbH

Franz Oechsle Str. 4

D-73207 Plochingen,
Germany

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AD54.30-P-6000-02GH

HHT interface test electrics IC

t

A

Scope of test

Measuring instrument/

Test connection

Operation/

Requirement

Specified value D Possible cause/

Remedy

1.0

HHT interface

Connection between A1

and data link connector
(DTC readout) (X11/4)

X11/4

15

w

b

A1

L

11

(B.11)

Ignition: OFF

Remove A1

Coupling "B" (12-pin)

disconnected

T

5 W

D Cable

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AF18.00-P-8045A

High oil consumption, blue smoke

26.10.99

ENGINE

112 in MODEL 129, 163, 202, 208, 210

ENGINE

112 in MODEL 463

Modification notes

18.11.99

Supersedes STIP 18.40-004 dated 5.11.97

Remedy revised

Damage code

Cause

Remedy

01 241 B2

Cast iron crust in oil drain duct on right
cylinder head, inner rear

1

Remove right cylinder head.

#

In case of complaint oil drain duct is filled

with engine oil.

Engine 112 in model 129, 202, 208, 210

AR01.30-P-5800B

Engine 112.942 in model 163.154

AR01.30-P-5800MV

Engine 112.945 in model 463

AR01.30-P-5800GV

2

Remove present cast iron crust.

Use sharp edged 10 mm punch. The cast

iron crust (approx. 11x17x1 mm) is located
approx. 50 mm below the upper cylinder head
separating surface.

3

Install right cylinder head

#

Engine 112 in model 129

AR01.30-P-5800B

Engine 112 in model 202, 208, 210

AR01.30-P-5800BA

Engine 112.942 in model 163.154

AR01.30-P-5800MV

Engine 112.945 in model 463

AR01.30-P-5800GV

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AF18.00-P-8044D

High oil consumption

12.3.01

ENGINE

112 in MODEL 129, 163, 170, 202, 203, 208, 210, 220

ENGINE

113 in MODEL 129, 163, 202, 208, 210, 215, 220

ENGINE

112, 113 in MODEL 463

Damage code

Cause

Remedy

Studies on engines 112/113 due to

excessive engine oil consumption have
indicated to date that excessive engine oil
consumption is not a general subject, but
rather can result from various causes.

The causes listed below may cause
excessive engine oil consumption individually
or in combination.
For commercially available tools for see
Workshop Equipment Manual

Cause 1:

Remedy 1:

00 001 70

Cast iron crust in right cylinder head behind
oil drain opening

1

Remove cast iron crust

AF18.00-P-8045A

Cause 2:

Remedy 2:

00 001 70

V-shaped material flaws (rough unhoned
points) on individual cylinder liners

Up to production 08/2000.

1

Check cylinder liners with piston at
bottom dead center.

#

Inspect cylinders with light probe

AR01.00-P-0200AU

*WH58.30-Z-1009-05A

*WH58.30-Z-1010-05A

*WH58.30-Z-1027-05A

Cylinder barrels not okay:

#

2

Remove/install/replace engine or
shortblock.

Cause 3:

Remedy 3:

00 001 70

Single oil scraper rings with ring tension at
lower tolerance limit.

Up to production 06/1999.

1

Perform oil consumption test drive over
approx. 500 km.

AR18.00-P-0025AV

Exclude all other types of faults.

2

Remove/install/replace piston rings.

Install cleaned pistons with new piston

rings in the same cylinder.

Install piston rings with optimized ring

tension.
These piston rings are available as
replacement parts under the normal
replacement part number.

Cause 4:

Remedy 4:

00 001 70

Individual (right) cylinder heads with inner
porous points to air injection duct.

1

Check left/right cylinder bank.

If a cylinder bank is oily:

#

2

Remove/install/replace only this cylinder
head.

ENGINE 112 in MODEL 220, 210, 208, 202,

129

ENGINE 113 in MODEL 220, 210, 208, 202,

129

AR01.30-P-5800B

ENGINE 112.942 in MODEL 163.154

ENGINE 113.942 in MODEL 163.172

ENGINE 113.981 in MODEL 163.174

AR01.30-P-5800MV

ENGINE 112.945, 113.962 in MODEL 463

AR01.30-P-5800GV

Cause 5:

Remedy 5:

00 001 70

Individual engines with missing valve seals on
individual cylinders

1

Remove valve springs on affected
cylinder.

AR05.30-P-3500B

In this case, usually one cylinder is oily, oil

runs through valve cone into cylinder when
valve is open.

2

Check valve seal.

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