1997 MERCEDES-BENZ ML350 compression ratio

287 Technical data
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index Technical data
Model ML 320 (163 154)
1
ML 430 (163 172)
1
ML 55 AMG (163 174)
1
Engine112 113 113
Mode of operation 4-stroke engine,
gasoline injection4-stroke engine,
gasoline injection4-stroke engine,
gasoline injection
No. of cylinders688
Bore 3.54 in (89.90 mm) 3.54 in (89.90 mm) 3.82 in (97.00 mm)
Stroke 3.31 in (84.00 mm) 3.31 in (84.00 mm) 3.62 in (92.00 mm)
Total piston displacement 195.2 cu.in. (3199 cm
3) 260.6 cu.in. (4266 cm
3) 332.0 cu.in. (5439 cm
3)
Compression ratio 10:1 10:1 10.5:1
Output acc. to SAE J 1349 215 hp / 5600 rpm
(160 kW / 5600 rpm)268 hp / 5750 rpm
(200 kW / 5750 rpm)342 hp / 5500 rpm
(255 kW / 5500 rpm)
Maximum torque acc. to
SAE J 1349233 ft.lb / 3000 rpm
(315 Nm / 3000 rpm)288 ft.lb / 3000 rpm
(390 Nm / 3000 rpm)376 ft.lb / 2800 rpm
( 510 N m / 2 80 0 r p m )
Maximum engine speed 6000 rpm 6000 rpm 6000 rpm
Firing order 1-4-3-6-2-5 1-5-4-2-6-3-7-8 1-5-4-2-6-3-7-8
Poly-V-belt 2390 mm 2390 mm 2390 mm
1 The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Light Truck Center for the corresponding data of all
special bodies and special equipment.

287
Technical data
Te ch n ica l
data
Instruments
and controls Operation Driving
Instrument
cluster display Practical hints Car care Index
Technical data
Model ML 320 (163 154)
1
ML 430 (163 172)
1
ML 55 AMG (163 174)
1
Engine 112 113 113
Mode of operation 4-stroke engine, gasoline injection 4-stroke engine,
gasoline injection 4-stroke engine,
gasoline injection
No. of cylinders688
Bore 3.54 in (89.90 mm) 3.54 in (89.90 mm) 3.82 in (97.00 mm)
Stroke 3.31 in (84.00 mm) 3.31 in (84.00 mm) 3.62 in (92.00 mm)
Total piston displacement 195.2 cu.in. (3199 cm
3) 260.6 cu.in. (4266 cm
3) 332.0 cu.in. (5439 cm
3)
Compression ratio 10:1 10:1 10.5:1
Output acc. to SAE J 1349 215 hp / 5600 rpm (160 kW / 5600 rpm) 268 hp / 5750 rpm
(200 kW / 5750 rpm) 342 hp / 5500 rpm
(255 kW / 5500 rpm)
Maximum torque acc. to
SAE J 1349 233 ft.lb / 3000 rpm
(315 Nm / 3000 rpm) 288 ft.lb / 3000 rpm
(390 Nm / 3000 rpm) 376 ft.lb / 2800 rpm
( 510 N m / 2 80 0 r p m )
Maximum engine speed 6000 rpm 6000 rpm 6000 rpm
Firing order 1-4-3-6-2-5 1-5-4-2-6-3-7-8 1-5-4-2-6-3-7-8
Poly-V-belt 2390 mm 2390 mm 2390 mm
1 The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Light Truck Center for the corresponding d ata of all
special bodies and special equipment.

294 Technical dataEngine
EngineModel
ML 350 (163.157
1)
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Light Truck Center for the corresponding data of all special bodies and special
equipment.
ML 500 (163.175)
1
Engine
112
113
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
6
8
Bore
3.81 in (97.00 mm)
3.81 in (97.00 mm)
Stroke
3.31 in (84.00 mm)
3.31 in (84.00 mm)
Total piston displacement
227 cu in (3724 cm
3)
303 cu in (4966 cm
3)
Compression ratio
10:1
10:1
Output acc. to SAE J 1349
232 hp / 5750 rpm
(173 kW / 5750 rpm)
288 hp / 5600 rpm
(215 kW / 5600 rpm)
Maximum torque acc. to SAE J 1349
254 lb-ft / 3000-4500 rpm
(345 Nm / 3000-4500 rpm)
325lb-ft/2700rpm
(440 Nm / 2700 rpm)
Maximum engine speed
6000 rpm
6000 rpm
Firing order
1-4-3-6-2-5
1-5-4-2-6-3-7-8
Poly-V-belt
2370 mm
2370 mm

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
The mechanism of the ignition lock interlock connects the selector lever of the floor shift with the ETC control
module (N73). See Fig. 163
. It prevents the transmitter key (A8/1) from being withdrawn when the selector
lever is not at position "P".
When the parking lock is not engaged (selector lever position "D", "R", "N"), the locking valve (60) locks the
locking cam (61). The compression spring (62) only pulls the locking valve (60) away from the locking cam
(61) in selector lever position "P". The transmitter key (A8/1) can now be turned to position "0" and removed
from the ignition.
Parking Lock, Location/Task/Design/Function

See PARK PAWL, LOCATION/TASK/DESIGN/FUNCTION
.
Function Of Shift lock Override
Transmission with touch shift 722.6 in MODEL 163
Operation

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:30 PMPage 292 © 2006 Mitchell Repair Information Company, LLC.

Fig. 40: Identifying Electrical Connection Kit (220 589 00 99 00)
2Connect compression recorder (01)
113
Model 211AR01.10-P-
0010-01T
Model 215, model 220AR01.10-P-
0010-01L
Model 230AR01.10-P-
0010-01R
Model 240AR01.10-P-
0010-01H
Model 463.2AR01.10-P-
0010-01GV
Compression recorderFig. 21
Electrical connection setFig. 40
Adapter cableFig. 42
3Crank engine
Press contact switch (02) on
compression recorder (01) for this
step.
Do not crank engine via
ignition/starter switch (8), EIS [EZS]
control unit or Start-Stop button.

4Install in the reverse order
5Read out fault memory and erase if
necessary
If the ignition was switched on
during the process: ?
Stored faults which may be caused
by removal and installation or test
operations, must be erased from the
diagnostic trouble code memories
after completing the work.
STAR DIAGNOSIS di agnosis system
Handheld tester (HHT)
*WH58.30-
Z-1048-13A
*WH58.30-
Z-1036-13A

2001 Mercedes-Benz ML320
1998-2005 ENGINE Complete engine - 163 Chassis
me
Saturday, October 02, 2010 3:17:56 PMPage 48 © 2006 Mitchell Repair Information Company, LLC.

Risk of accident
from vehicle starting off during starting operation (e.g. when testing compression pressure) as a result of gear
engaged or when engine running, or vehicles with automatic transmission as a result of selector lever position
"P" or "N" not engaged (exception: some vehicles do not have a selector lever position "P" ).
Injury hazard
Severe injuries may be caused by unshielded rotating parts in the area of the running engine.
The heat produced by the running engine can result in severe burns if contact is made with individual,
unshielded parts.
Procedural guidelines and safety precautions
As a general rule, carry out work on the running engine only if this is absolutely necessary.
Before starting the engine, apply parking brake .
On models with manual transmission move gearshift lever into Neutral position .
On vehicles with automatic transmission move selector lever into position "P" or "N" (exception:
some vehicles do not have a selector lever position "P" ).
On models which do not have selector lever position "P", secure selector lever to prevent it from
being operated unintentionally .
Wear closed and close-fitting work clothes.
All items of jewelry like chains or rings must be taken off.
Restrain long hair by wearing an appropriate head cover.
Before commencing any work on the running engine, familiarize yourself with the location of potentially
hot parts.
When carrying out work when starting the engine or when engine is running do not touch any hot and
rotating parts .
First aid measures in the event of burns
Do not rub the skin areas affected; flush with plenty of cold water and cover skin with sterile bandages.
Consult a doctor without delay.
RISK OF INJURY CAUSED BY DRILLING GAS-FILLED ASSEMBLIES OR COMPONENTS (NONCOMBUSTIBLE GASES)
- AS00.00-Z-0006-01A
Wear safety glasses and a face mask.
Risk of injury when drilling
There is an increased risk of injury to the skin and eyes when drilling gas-filled assemblies due to shavings
being thrown out. The shavings are picked up by the escaping gases and accelerated to a greater or lesser extent
depending on the pressure. The extent of injuries increases as the pressure increases. The pressures involved

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:47 PMPage 219 © 2006 Mitchell Repair Information Company, LLC.

Fig. 71: Identifying Refrigerant Circuit, Function (Model 163 As Of 1.9.01 With Code (580A) Automatic
Air Conditioning)
The refrigerant compressor driven by the motor compresses the gaseous refrigerant, which is thereby heated up
and routed to the condenser.
The refrigerant's compression heat is then withdrawn on the surface of the condenser. While cooling down, the
refrigerant liquefies.
When the refrigerant flows through the fluid reservoir it is cleansed of any chemical and mechanical impurities.
The water contained in the refrigerant is separated and collected.
The expansion valve sprays the cooled and liquefied refrigerant into the evaporator, which is located in the
fresh-air flow. Here the refrigerant is vaporized. Through this evaporation process heat is extracted from the
fresh air flowing past from outside over the tube and fin system so that air cools down.
The air humidity carried along is converted to condensed water, which escapes into the open. The air dries out.
The refrigerant compressor aspirates the refrigerant which has turned gaseous on account of the heat absorption
and then compresses it yet again.
When the engine is running and the blower switched on, the interior can be supplied with cooled air through the
various air outlets. Cooling intensity is dependent upon the preset in-car temperature and blower setting.
Engine 111.977, 112.942, 112.970

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:16 PMPage 87 © 2006 Mitchell Repair Information Company, LLC.

Fig. 102: Identifying Refrigerant Compressor Components
Function
The rotary movement of the belt pulley (1) is transmitted via the refrigerant compressor shaft (13) to the stop
plate (12), which is permanently fastened to the refrigerant compressor shaft (13) by way of a press fit.
The rotation of the stop plate (12) is transmitted to the swash plate (4) by means of a hinged mechanism.
Conversion of the swash plate's (4) rotary motion into the oscillating motion of the seven pistons (6) takes place
via two sliding shoes each (11).
The evaporation tank on the pressure side (5) and evaporation tank on the suction side (7) reduce gas pulsation
in the refrigerant compressor by providing for uniform refrigerant flow. This helps to prevent noise in the
compression process
Volume control
The refrigerant compressor control valve (8) has a corresponding control current applied to it to match the
output requested. This in turn enables the compression volume to be regulated between 2 and 100 %.
The position of the swash plate (4) is determined through monitoring, processing and evaluation of the
following automatic air conditioning controlled variables:
Pressure in the crankcase (2) of the refrigerant compressor

2001 Mercedes-Benz ML320
1998-2005 HVAC Climate Control - 163 Chassis
me
Saturday, October 02, 2010 3:23:16 PMPage 124 © 2006 Mitchell Repair Information Company, LLC.