Page 2385 of 4133
Fig. 18: Identifying Compression Recorder Assembly
Remove/install
Risk of accident caused
by vehicle starting off by
itself when engine is
running. Risk of injury
caused by contusions and
burns during starting
procedure or when
working near the running
engineSecure vehicle to prevent
it from moving by itself.
Wear closed and snug-
fitting work clothes.
Do not grasp hot or
rotating parts.AS00.00-Z-0005-01A
1Bring engine to operating
temperature (approx. 80°
C)
Only test compression
when engine is at
operating temperature.
2Remove engine trim
panel
3Remove air filter housing
4Remove resonance pipe
with resonance body
All except model 163
with engine 113.942/981.
Disconnect plug
AR07.07-P-1454A
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 29 © 2006 Mitchell Repair Information Company, LLC.
Page 2386 of 4133

connection for hot
film mass air flow
sensor (HFM-SFI)
for this step and
unbolt resonance
pipe at cylinder
head cover.
The resonance pipe is
attached to the rear of the
intake manifold with a
plastic bracket.
Do not damage plastic
plate.
5Remove spark plugsRemove only one spark
plug at each cylinder: ?
Models 210, 208, 202
with engine 112
Model 210 with engine
113AP15.10-P-1580A
Model 163 with engines
112, 113AP15.10-P-1580GH
6Crank engine with starter.Do not crank engine at
steering lock but use
contact switch of the
compression recorder.
Crank engine several
times with the starter in
order to eliminate
combustion residues in
the cylinder.AR01.10-P-0110V
Checking
7Insert compression tester
into spark plug bore Fig. 21
8Open throttle valve
9Crank engine with starterDo not crank engine at
steering lock but use
contact switch of the
compression recorder.
To check the
compression pressure,
crank the engine by at AR01.10-P-0110V
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 30 © 2006 Mitchell Repair Information Company, LLC.
Page 2387 of 4133

Compression pressure
least 8 revolutions.
10Carry out test procedure
at the remaining cylinders
in the same way
11Compare measurements
obtained with the
specified pressures *BE01.00-P-1001-01D
*BE01.00
-P-1002-01D
*BE01.00
-P-1003-01D
If necessary, if the
pressure is below the
minimum compression
pressure or if permissible
difference between
individual cylinders is
exceeded:?
Inspect cylinders for
leaksAR01.00-P-1300HV
12Install in the reverse
order
NumberDesignationEngines 112.910/
911/912/920/921/923/940/941/
942/943/960, 113.940/942/
943/961/963 low compressionEngines 112.910/
911/920/921/
922/923/940/
941/942/943/
944/945/946/947,
113.940/941/942/
943/960/961/962/
963/965/968/969
normal
compressionEngine
113.944
Standard
compression
BE01.00-
P-1001-
01DCompression
installation
tolerance or
new valuebar10...1212 to 1411 to 13
BE01.00-
P-1002-
01DCompression
pressure wear
limit or limit
valuebar8.09.010.0
BE01.00-
P-1003-
01DCompression
pressure
permissible
difference
between
individual
cylindersbar1.51.51.5
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 31 © 2006 Mitchell Repair Information Company, LLC.
Page 2388 of 4133

Compression pressure
Fig. 19: Identifying Compression Recorder (001 589 76 21 00)
TESTING COMPRESSION PR ESSURE - AR01.00-P-1200V
ENGINE 112
Air filter motor page arranged
ENGINE 113 (except 113.995) in MODEL 129, 163, 202, 203, 208, 209, 210, 211, 215, 220, 230 Air filter
motor page arranged
ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250
ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254
ENGINE 113.982 in MODEL 463.243
NumberDesignation
Engines 113.980/
981/982/984 Standard
compressionEngine
113.992/995Engine
113.992/995
990/991/993
BE01.00-P-
1001-01DCompression installation
tolerance or new valuebar11 to 1311 to 139 to 12
BE01.00-P-
1002-01DCompression pressure wear
limit or limit valuebar10.08.08.0
BE01.00-P-
1003-01DCompression pressure
permissible difference
between individual cylinders
bar1.51.51.5
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 32 © 2006 Mitchell Repair Information Company, LLC.
Page 2389 of 4133

Fig. 20: Identifying Compression Recorder Assembly
Remove/install
Risk of accident caused
by vehicle starting off by
itself when engine is
running. Risk of injury
caused by contusions and
burns during starting
procedure or when
working near the running
engine
Secure vehicle to prevent it from
moving by itself.
Wear closed and snug-fitting work
clothes.
Do not grasp hot or rotating parts.AS00.00-Z-0005-01A
1Bring engine to
operating temperature
(approx. 80°C)Test compression pressure only
when engine is at normal
operating temperature.
2Remove air filter
housingAll except model 203.065/265,
170.466: ?
Detach the air filter housing
from the rubber retainers at the
cylinder head covers vertically
upward.
Models 211, 220, 230.475:
Unclip engine front end cover.
Installation: Rub the retaining
rubbers on the cylinder head
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 33 © 2006 Mitchell Repair Information Company, LLC.
Page 2390 of 4133

covers and sealing ring of the hot
film air mass sensor in the air
filter housing with lubricant.
Models 230.474, 203.065/265,
170.466AR09.10-P-1150SVK
Lubricant
*BR00.45
-Z-1002-
06A
3Remove spark plugs Remove only one spark plug
per cylinder: ?
Models
463.209 /232 /233 /244 /245 /250
with engine 112.945.AP15.10-P-1580GA
Models
463.206 /240 /241 /247 /248 /
249 /254 with Engine 113.962.
Models 463.243 /246 with Engine
113.982
Models 211, 220, 230.474/475AP15.10-P-1580AB
Models 210, 208, 203, 202, 170,
129AP15.10-P-1580A
4.1Remove key from
electronic ignition switch
(EIS)Models 211,230.474/475
Vehicles with code (889)
Keyless Go: Press the start/stop
button repeatedly until the ignition
is switched off.
5Crank engine with
starter. Do not crank engine at steering
lock but use contact switch of the
compression recorder.
In order to remove the
combustion residue from the
cylinders, crank the engine for
about 5 seconds with the starter.
All except model 203AR01.10-P-0110V
Model 203AR01.10-P-0110PV
Checking
6Insert compression tester
into spark plug bore Compression recorderFig. 21
7Open throttle valveExcept models 211, 230.474/475
8Crank engine with
starter. Do not crank engine at steering
lock but use contact switch of the
compression recorder.
All except model 203AR01.10-P-0110V
Model 203AR01.10-P-0110PV
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 34 © 2006 Mitchell Repair Information Company, LLC.
Page 2391 of 4133

Compression pressure
9Carry out test procedure
at the remaining
cylinders in the same
way
10Compare measurements
obtained with the
specified pressuresCompression installation tolerance
or new value*BE01.00-P-1001-
01D
Compression pressure wear limit
or limit value*BE01.00-P-1002-
01D
Compression pressure permissible
difference betw een individual
cylinders*BE01.00-P-1003-
01D
If the pressure is below the
minimum compression pressure or
if the permissible difference
between individual cylinders is
exceeded: ?
Inspect cylinders for leaksAR01.00-P-1300HV
11Install in the reverse
order
NumberDesignation
Engines 112.910/
911/912/920/921/923/940/941/
942/943/960, 113.940/942/
943/961/963 low compression
Engines 112.910/
911/920/921/
922/923/940/
941/942/943/
944/945/946/947,
113.940/941/942/
943/960/961/962/
963/965/968/969
normal compression
Engine
113.944
Standard
compression
BE01.00-
P-1001-
01DCompression
installation
tolerance or
new value
bar10...1212 to 1411 to 13
BE01.00-
P-1002-
01DCompression
pressure wear
limit or limit
value
bar8.09.010.0
BE01.00-
P-1003-
01D
Compression
pressure
permissible
difference
between
individual
cylinders
bar1.51.51.5
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 35 © 2006 Mitchell Repair Information Company, LLC.
Page 2392 of 4133
Compression pressure
Fig. 21: Identifying Compression Recorder (001 589 76 21 00)
Repair materials
FIRING ORDER - AR01.00-P-1300-03HA
Fig. 22: Identifying Firing Order (Engines 111, 601, 604, 611, 271)
NumberDesignation
Engines 113.980/
981/982/984 standard
compressionEngine
113.987/988/
990/991/993Engine
113.992/995
BE01.00-P-
1001-01DCompression installation
tolerance or new valuebar11 to 139 to 1211 to 13
BE01.00-P-
1002-01DCompression pressure wear
limit or limit valuebar10.08.08.0
BE01.00-P-
1003-01DCompression pressure
permissible difference
between individual cylinders
bar1.51.51.5
NumberDesignationOrder number
BR00.45-Z-1002-06ALubricantA 000 989 01 60
2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 36 © 2006 Mitchell Repair Information Company, LLC.