1997 MERCEDES-BENZ ML320 engine

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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Page 1

Valve seal not okay :
#
3
Remove/install/replace valve seal.

AR05.30-P-3500B

Cause 6:
Remedy 6:

00 001 70
1.5 mm hole missing on individual right

cylinder head covers at connection to

crankcase ventilation.
1
Check cylinder head cover

Up to production 06/1999.

Crankcase ventilation out of order, engine can

sludge up and consume oil as a result

Cylinder head cover not okay:
#
2
Remove/install/replace cylinder head

cover.

ENGINE
112

Air cleaner positioned on engine

side.

ENGINE
113

Air cleaner positioned on engine

side.
AR01.20-P-5014BV

ENGINE

112

Air cleaner positioned on engine side

ENGINE
113

Air cleaner positioned on engine side

AR01.20-P-5014B

Cause 7:
Remedy 7:

00 001 70
Engine oil sludging due to excessively long

engine oil change intervals
Service information: Oil sludge

SI18.00-P-0010A

If the service interval according to

ASSYST is exceeded, the engine oil sludges

up sooner or later depending on the oil

quality, type of operation and operating time.

Engine consumes oil.

See Service Information.

1
Print out ASSYST printout.

2
Check oil change intervals

3
Inform vehicle owner.

4
Remove/install/replace piston rings.

AR03.10-P-7311BV

Disassemble and clean sludged engines

completely because dirty oil usually gets into

clean-oil side due to clogged oil filter.

Cause 8:
Remedy 8:

00 001 70
Piston rings sticky or have coke deposits from

engine oils (e.g. API-S in USA) in connection

with regionally poor fuel quality.

Always use engine oils according to

Specifications for Operating Fluids 229.3, do

not add special additives to engine oil and fuel

BB00.40-P-0229-03A

1
Remove/install/replace piston rings.

AR03.10-P-7311BV

Cause 9:
Remedy 9:

00 001 70
Piston ring wear due to excessive

contamination/dust (model 163) through air

intake system.
1
Remove/install/replace gaskets on air

intake line and distribution element of

partial load ventilation.

e.g. due to incorrect assembly after

workshop visit or embrittlement of gaskets
The distribution element with optimized

material will be available as of 11/ 2000 as a

standard feature.

2
Remove/install/replace intake module.

Exterior oil loss, e.g. due to cast iron

porosity on left side of crankcase in area of

engine support is not considered to be oil

consumption

In the event of a customer complaint

regarding the engine oil consumption, always

determine the oil consumption definitely

because the oil indicator lamp can come on

due to other causes (e.g. defective oil sensor).

Commercially available tools
(see Workshop Equipment Manual)

Number

Designation
Make (e. g.)
Order number

WH58.30-Z-1009-05A
Flexible inspection light
Scope of supply 1 (complete unit):

-glass fiber optical fiber

-light projector

-230 V, storage case

-operating instructions

-graphics protocol
Richard Wolf GmbH

Pforzheimerstr. 32

D-75438 Knittlingen

Karl Storz GmbH

Mittelstr. 8

D-78532 Tuttlingen
1.00565.00

80902

WH58.30-Z-1010-05A
Flexible inspection light

Scope of delivery 2 (for workshops which already have an approved

Wolf or Storz inspection light):

-storage case

-operating instructions

-pictures protocol
Richard Wolf GmbH

Pforzheimerstr. 32

D-75438 Knittlingen

Karl Storz GmbH

Mittelstr. 8

D-78532 Tuttlingen
7.05065.00

K03506AJ

Copyright DaimlerChrysler AG 20.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
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Page 2

AR88.40-P-3020GH
Adjust engine hood
8.4.99

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

P88.40-2067-09

1
Bolts

2
Engine hood

3
Engine hood hinge
7

Locknut

8
Nuts

4

Bolts

5
Engine hood catch upper section

6
Stop buffer

Longitudinal, height and transverse

adjustment


Danger!

Risk of injury
to
fingers being jammed or

pinched
when Remove/install or aligning

hoods, doors, trunk lid/tailgate or sliding roof.
When moving components, ensure that no

body parts or limbs are within the operating

range of moving parts.

AS00.00-Z-0011-01A

1
Open engine hood (2)

For slight range of adjustments for

longitudinal and height adjustment

2
Loosen bolts (1) on engine hood hinge (3)

and adjust engine hood (2)

3
Tighten bolts (1)


*BA88.40-P-1001-01C

For larger range of adjustments for

longitudinal and height adjustment

4.1
Remove gas-operated strut from engine hood

(2) and put down in engine compartment

Risk of breakage. Do not remove the

retainer otherwise the preload will be lost.

AR88.40-P-3010GH

As of VIN A145273, X708319.

5
Remove cover on air intake

AR83.25-P-1405GH

6
Remove rubber cover from engine hood hinge


Installation:
Replace rubber cover.

7
Cut seam sealing along engine hood hinge so

that hinge can be moved


Installation:
Replace seam sealing. Paint

sealant after curing.

*BR00.45-Z-1004-01A

8
Loosen nuts (8) on engine hood hinge (3)

9
Adjust engine hood (2) so that front edges of

front fenders are flush with engine hood and

top edges are aligned

For larger range of adjustment in

longitudinal direction loosen engine hood

catch upper section (5) and tighten.


*BA88.40-P-1004-01C

10
Tighten nuts (8) for engine hood hinge (3)


*BA88.40-P-1002-01C

11.1
Install gas-operated strut

As of VIN A145273, X708319.

AR88.40-P-3010GH

12
Adjust stop buffer (6)

Unscrew locknut (7). Adjust height of stop

buffer so that top edges of front fenders and

engine hood are flush If required, place

spacer plates below engine hood catch upper

section.

13
Fasten stop buffer (6)

Tighten locknut (7).

Transverse adjustment

14
Loosen bolts (4) from engine hood catch

upper section (5)

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15
Adjust gap dimensions
Gap dimensions

*BE60.00-P-1001-01D

Feeler gage

*129589032100

16
Align engine hood catch upper section (5)

centered in longitudinal and transverse
direction to engine hood catch lower section

and tighten


*BA88.40-P-1004-01C

17
Ensure that engine hood catch catches

properly

For this purpose, close engine hood and

pull upward with a jerk.

18
Release engine hood and ensure that safety

hook catches on radiator crossmember

19
Close engine hood (2)

Test and adjustment values, gap dimensions at hoods, doors and covers

Number

Designation
Model 163

BE60.00-P-1001-01D
Gap

dimension
Engine hood to fender
Dimension "A"
mm
5.0 (
F
0.5)

Engine hood to headlamp
Dimension "R"

mm
5.0 (
F
0.5)

Engine hood to radiator grille

Dimension "O"

mm
5.0 (
F
0.5)

Radiator grill to headlamp
Dimension "N"

mm
-

Fig., see
AR60.00-P-0700-

01GH


Engine hood

Number

Designation
Model 163

BA88.40-P-1001-01C
Bolt, engine hood hinge on engine hood
Nm
10

BA88.40-P-1002-01C
Nut, engine hood hinge to body
Nm
18

BA88.40-P-1004-01C
Bolt, engine hood catch upper section to engine

hood
Nm
12

129 589 03 21 00

Feeler gage

Auxiliary repair materials

Number

Designation
Order number

BR00.45-Z-1004-01A
MB body sealant for sealing seams (suitable for painting)
001 989 63 20

Copyright DaimlerChrysler AG 09.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
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Page 2

AR88.40-P-3020GH
Adjust engine hood
8.4.99

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

P88.40-2067-09

1
Bolts

2
Engine hood

3
Engine hood hinge
7

Locknut

8
Nuts

4

Bolts

5
Engine hood catch upper section

6
Stop buffer

Longitudinal, height and transverse

adjustment


Danger!

Risk of injury
to
fingers being jammed or

pinched
when Remove/install or aligning

hoods, doors, trunk lid/tailgate or sliding roof.
When moving components, ensure that no

body parts or limbs are within the operating

range of moving parts.

AS00.00-Z-0011-01A

1
Open engine hood (2)

For slight range of adjustments for

longitudinal and height adjustment

2
Loosen bolts (1) on engine hood hinge (3)

and adjust engine hood (2)

3
Tighten bolts (1)


*BA88.40-P-1001-01C

For larger range of adjustments for

longitudinal and height adjustment

4.1
Remove gas-operated strut from engine hood

(2) and put down in engine compartment

Risk of breakage. Do not remove the

retainer otherwise the preload will be lost.

AR88.40-P-3010GH

As of VIN A145273, X708319.

5
Remove cover on air intake

AR83.25-P-1405GH

6
Remove rubber cover from engine hood hinge


Installation:
Replace rubber cover.

7
Cut seam sealing along engine hood hinge so

that hinge can be moved


Installation:
Replace seam sealing. Paint

sealant after curing.

*BR00.45-Z-1004-01A

8
Loosen nuts (8) on engine hood hinge (3)

9
Adjust engine hood (2) so that front edges of

front fenders are flush with engine hood and

top edges are aligned

For larger range of adjustment in

longitudinal direction loosen engine hood

catch upper section (5) and tighten.


*BA88.40-P-1004-01C

10
Tighten nuts (8) for engine hood hinge (3)


*BA88.40-P-1002-01C

11.1
Install gas-operated strut

As of VIN A145273, X708319.

AR88.40-P-3010GH

12
Adjust stop buffer (6)

Unscrew locknut (7). Adjust height of stop

buffer so that top edges of front fenders and

engine hood are flush If required, place

spacer plates below engine hood catch upper

section.

13
Fasten stop buffer (6)

Tighten locknut (7).

Transverse adjustment

14
Loosen bolts (4) from engine hood catch

upper section (5)

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15
Adjust gap dimensions
Gap dimensions

*BE60.00-P-1001-01D

Feeler gage

*129589032100

16
Align engine hood catch upper section (5)

centered in longitudinal and transverse
direction to engine hood catch lower section

and tighten


*BA88.40-P-1004-01C

17
Ensure that engine hood catch catches

properly

For this purpose, close engine hood and

pull upward with a jerk.

18
Release engine hood and ensure that safety

hook catches on radiator crossmember

19
Close engine hood (2)

Test and adjustment values, gap dimensions at hoods, doors and covers

Number

Designation
Model 163

BE60.00-P-1001-01D
Gap

dimension
Engine hood to fender
Dimension "A"
mm
5.0 (
F
0.5)

Engine hood to headlamp
Dimension "R"

mm
5.0 (
F
0.5)

Engine hood to radiator grille

Dimension "O"

mm
5.0 (
F
0.5)

Radiator grill to headlamp
Dimension "N"

mm
-

Fig., see
AR60.00-P-0700-

01GH


Engine hood

Number

Designation
Model 163

BA88.40-P-1001-01C
Bolt, engine hood hinge on engine hood
Nm
10

BA88.40-P-1002-01C
Nut, engine hood hinge to body
Nm
18

BA88.40-P-1004-01C
Bolt, engine hood catch upper section to engine

hood
Nm
12

129 589 03 21 00

Feeler gage

Auxiliary repair materials

Number

Designation
Order number

BR00.45-Z-1004-01A
MB body sealant for sealing seams (suitable for painting)
001 989 63 20

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AR88.40-P-3100GH
Remove/install control cable for engine hood
5.5.00

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

P88.40-2140-06

Illustrated up to VIN A145272, X708318

1
Clips

2
Rubber grommet

3
Engine hood control cable


Removing and installing

1
Open engine hood and raise to vertical position
Up to VIN A145272, X708318.

AR88.40-P-1000GH

As of VIN A145273, X708319.

AR88.40-P-1000GI

2.1
Remove upper frame cross member
Only up to VIN A145272, X708318

AR62.30-P-2300GH
2.2Remove engine hood lock
Only as of VIN A145273, X708319.

AR88.40-P-3200GI

3.1
Unhook engine hood control cable from clip at

bottom of radiator cross member
Only as of VIN A145273, X708319.

4
Remove cover from fuse and relay box

5 screws.

5
Unhook clips (1) from body

6
Remove left cover below instrument panel
Left hand drive vehicle.

AR68.10-P-1500GH

Vehicles with right-hand steering up to

VIN A145272, X708318.

AR68.10-P-1520GH

Vehicles with right-hand steering as of

VIN A145273, X708319.

AR68.10-P-1520GI

7
Remove paneling in left footwell

AR68.30-P-4010GH

8
Unhook engine hood control cable at side at

clip in footwell

9
Remove rubber grommet (2) from fuse and

relay box

10
Pull out engine hood control cable (3) through
firewall on engine side and remove


Installation:
Ensure that engine hood

control cable is routed cleanly along fuse and

relay box.

11
Install in the reverse order

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AR88.40-P-4050R
Remove/install Mercedes star
30.3.01

MODEL
163, 203.7, 215, 230.467 /474 /475 /476 /479

P88.40-2291-11

Shown on model 230

1
Mercedes star

2
Grommets


Remove/Install

1
Remove Mercedes star (1) from engine hood

upward with long wedge (1)

Protect engine hood around Mercedes

star (1) with adhesive tape to avoid damaging

paint.


Long wedge

*115589035900

2
Remove grommets (2)

Check grommets (2) and replace if

required.

3
Install in the reverse order

Long wedge

115 589 03 59 00

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Page 1