engine MERCEDES-BENZ ML320 1997 Complete Repair Manual

KEY TO BODY PLATE - AH00.00-P-4000-01A
Model 100, 107, 108, 109, 111, 112, 113, 114, 115, 116, 123, 124, 126, 129, 140, 163, 168, 170, 201, 202, 208,
210
Engine numberThe engine number is the identification number for
every engine. It also provides information on the
version of this engine.
Sales DesignationIs used for several model series. 240 D is used for
instance for models 115, 123. Is used to determine a
microfiche of the replacement part literature only in
combination with the model (= the first 3 digits of
the chassis number).
Transmission numberThe complete transmission number is specified on
the data card. It is the identification number or every
transmission.
Groups and SA (optional equipment) numbers (as
of 1983, not on vehicle data card in maintenance
booklet)The special equipment numbers are arranged based
on ascending groups. Special equipment numbers are
listed several times, if they pertain to several groups.
e.g.: special equipment number 56 149/2 can appear
in groups 67, 72, 73, 74.
LampsIt is essential to state the manufacturer for
determining headlamp parts, as different
manufacturer's parts are not completely
interchangeable.
SA (optional equipment) code numberThe 3-digit codes for special equipments are written
in ascending order in lines. The slash that was used
earlier is omitted. Thus, 410 corresponds to 41/0, 466
corresponds to 46/6 etc. The meaning of the special
equipment code can be found in the "Code list of
special versions - Passenger cars".
EquipmentCode for color and material dependent interior trim.
PaintworkColor code for the original paintwork, single-
colored. In the event of multicolor painting,
additional codes are listed in fields 32-35.
Lock system number (not on all vehicle data cards)The lock system numbers of master and secondary
keys are identical.
Differentiating characteristic H=master key,
N=secondary key. The lock system number has to be
specified when ordering spare keys or locks for
certain vehicles in order to sustain a consistent
closing system.

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connections with self
tapping screws01SM
Key to chassis numberMODEL 107 as of 1.8.83, 124, 126
as of 1.8.83, 129, 140, 201, 202, 210AH00.00-P-2000-01A
Chassis number
breakdownMODEL
163.113/128 /136 /154 /172 /174 /175AH00.00-P-2000-
01GH
Chassis number
breakdownMODEL 450AH00.00-P-2000-
01SM
Chassis number
breakdownMODEL 463.249 /246 /271AH00.00-P-2000-01U
Layout of vehicle data
cardMODEL 100, 107, 108, 109, 111,
112, 113, 114, 115, 116, 123 from
01.01.60 until 31.12.77AH00.00-P-3000-01A
Layout of vehicle data
cardMODEL 123, 124, 126, 129, 140,
163, 168, 170, 201, 202, 208, 210,
215, 220 ab 01.01.78AH00.00-P-3000-01B
Key to body plateMODEL 100, 107, 108, 109, 111,
112, 113, 114, 115, 116, 123, 124,
126, 129, 140, 163, 168, 170, 201,
202, 208, 210...AH00.00-P-4000-01A
Conversion measures
resulting in alteration to
vehicle modelMODEL 100, 107, 108, 109, 111,
112, 113, 114, 115, 116, 123, 124,
126, 129, 140, 163, 168, 170, 201,
202, 208, 210...AH00.10-P-1000-01A
Converting vehicles to
operate on liquefied
petroleum gasMODEL 123.220 /280, 124.020 /080,
126.021, 201.023AH00.10-P-1000-02A
Notes on performance
correctionENGINE 104, 111, 112, 113, 119,
120, 137, 166, 601, 602, 603, 604,
605, 606 ...AH00.10-P-2010-01A
Correction tables for
calculating actual
performance valueENGINE 104, 111, 112, 113, 119,
120, 137, 166, 601, 602, 603, 604,
605, 606 ...AH00.10-P-2010-02A
Notes on replacing
safety-relevant
componentsMODEL allAH00.19-P-1000-02A
Advantages of repairing
wiring harnessesMODEL 124, 126, 129, 140, 163,
164, 168, 169, 170, 171, 199, 202,
203, 208, 209, 210, 211, 215, 216,
219, 220, 221, 230, 240, 245, 251,
414, 461, 463...AH00.19-P-1000-03A
Advantages of repairing
wiring harnessesMODEL 452.3 /4AH00.19-P-1000-
03RC
Advantages of repairing
wiring harnessesMODEL 450.3 /4, 454.0AH00.19-P-1000-
03SM

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GENERAL NOTES: PASSENGER CARS - AH00.01-Z-0998AZ
MODEL all
Notes on TowingMODEL 461, 463AH00.60-P-0100-
02GA
Overall vehicle
Overall vehicleFG00AH00.00-Z-9999AZ
Engine
Complete engine,
crankcase ventilation,
cylinder head, crankcaseFG01AH01.00-Z-9999AZ
Crank assemblyFG03AH03.00-Z-9999AZ
Engine timingFG05AH05.00-Z-9999AZ
Mixture formationFG07AH07.00-Z-9999AZ
Air intake, superchargingFG09AH09.00-Z-9999AZ
Electrical system - engineFG15AH15.00-Z-9999AZ
Engine lubrication,
engine oil coolingFG18AH18.00-Z-9999AZ
Engine cooling systemFG20AH20.00-Z-9999AZ
Engine suspensionFG22AH22.00-Z-9999AZ
Throttle control, cruise
control systemFG30AH30.00-Z-9999AZ
Fuel systemFG47AH47.00-Z-9999AZ
Exhaust systemFG49AH49.00-Z-9999AZ
Chassis
Manual transmissionFG26AH26.00-Z-9999AZ
Automatic transmissionFG27AH27.00-Z-9999AZ
Frame, trailer operationFG31AH31.00-Z-9999AZ
SuspensionFG32AH32.00-Z-9999AZ
Rear axleFG35AH35.00-Z-9999AZ
Wheels, chassis
alignment checkFG40AH40.00-Z-9999AZ
Brakes - hydraulic and
mechanical systemsFG42AH42.00-Z-9999AZ
Brakes - pneumatic
system and auxiliary
brakesFG43AH43.00-Z-9999AZ
SteeringFG46AH46.00-Z-9999AZ
Electrical system,
equipment and
instrumentsFG54AH54.00-Z-9999AZ

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CONVERSION MEASURES RESULTING IN ALTERATION TO VEHICLE MODEL - AH00.10-P-1000-01A
Model 100, 107, 108, 109, 111, 112, 113, 114, 115, 116, 123, 124, 126, 129, 140, 163, 168, 170, 201, 202, 208,
210
We disapprove of all vehicle conversions resulting in an alteration to the model. A standard production vehicle
is a design entity which, upon installation of parts alien to the model, usually changes in a detrimental way.
Changes to important components influence the homogeneity of the vehicle in its entirety. For this reason we
have not investigated the details to be observed when performing such conversions. Such conversions can also
lead to changes on the vehicle which require new proof that the vehicle complies with legal requirements.
The main reasons for our disapproval are:
1. Subsequent installation of a component such as a more powerful engine may overload the remaining
components such as the transmission, brakes, axles, etc.
Body
Body - generalFG60AH60.00-Z-9999AZ
Front end and fire wallFG62AH62.00-Z-9999AZ
Side wallFG63AH63.00-Z-9999AZ
Rear wall and rear endFG64AH64.00-Z-9999AZ
RoofFG65AH65.00-Z-9999AZ
WindowsFG67AH67.00-Z-9999AZ
Interior equipmentFG68AH68.00-Z-9999AZ
DoorsFG72AH72.00-Z-9999AZ
Sliding roof, soft top, top
attachmentsFG77AH77.00-Z-9999AZ
Central locking,
convenience feature,
drive authorization
systemFG80AH80.00-Z-9999AZ
Electrical system bodyFG82AH82.00-Z-9999AZ
Climate controlFG83AH83.00-Z-9999AZ
Emergency equipment,
sanitary equipment,
galleyFG86AH86.00-Z-9999AZ
Detachable body
components, exterior
flapsFG88AH88.00-Z-9999AZ
Seats, bunks, restraint
systemsFG91AH91.00-Z-9999AZ
Body sealing, corrosion
protectionFG97AH97.00-Z-9999AZ
PaintworkFG98AH98.00-Z-9999AZ

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2. Changes to the standard condition may decisively influence the new vehicle warranty, since our warranty
obligation does not cover damage resulting from a change to the original Daimler Benz delivery
condition.
3. Proper supply of parts is no longer ensured when major components are replaced.
4. The exchange procedure is based on the "Identical unit exchange" principle. For example, an identical
model reconditioned unit will be supplied in return for a damaged engine. Only then is it possible to be
credited for the returned damaged engine.
Customer inquiries and requests of this type should be answered along these lines in order to ensure that the
quality standard of our vehicles is not impaired.
NOTES ON PERFORMANCE CORRECTION - AH00.10-P-2010-01A
Engine 104, 111, 112, 113, 119, 120, 137, 166, 601, 602, 603, 604, 605, 606
General
The weather station's barometer must be calibrated to the air pressure specified by the local meteorological
office.
The measured performance value must be corrected with correction factors.
There are two 2 correction factors:
Altitude correction factor
Performance correction factor
Performance correction formula N
eo = Ne x KH
Neo = Performance in reference to normal operating conditions in kW.
Ne = Performance measured on the output dynamometer in kW.
K
H = Correction for intake air temperature, barometer level and altitude of the relevant test location.
Calculation example
1. Read air pressure, altitude and intake air temperature of the test location off at the weather station. NOTE: In addition, vehicles registered in the Federal Republic of Germany are subject
to the law which revokes the operating permit as a result of conversions which
change the model. We cannot issue a Certificate of non-objection for individual
approval by the technical motor vehicle testing authority in each case.

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In the example:
Air pressure of the test location =955 hPa (mbar)
Altitude of the test location = 400 m
Intake air temperature of the test location =+20°C
2. Determine the performance on the output dynamometer =100 kW
3. In the altitude correction Table, the altitude value of the test location = 400 m, results in a height
correction factor of 46 hPa (mbar).
4. The air pressure of the test location minus the height correction factor results in an air pressure value (p)
of:
955 hPa (mbar) - 46 hPa (mbar) = 909 hPa (mbar)
In order to be able to insert the air pressure (p) into the Table, it must be rounded. In the example, to 910
hPa.
5. On the basis of the air pressure (p) = 910 hPa, we read a correction factor (KH) of 1.0787 off from the
performance correction Table with an intake air temperature (t) of 20°C.
6. The performance data in relation to normal operating conditions results in the following:
N
eo = Ne x KH
N
eo = 100 kW x 1.0787 = 108 kW
Output on the dynamometer: Ne = 100 kW
Air pressure value of the test location: P= 955 hPa (955 mbar)
Air-charge temperature of the test location: t =+20°C
Altitude of the test location: 400 m above sea level
Units: hPa = Hecto Pascal
1 hPa = 1 mbar
1 Pa = 0.01 mbar
CORRECTION TABLES FOR CALCULATING ACTUAL PERFORMANCE VALUE - AH00.10-P-2010-02A
Engine 104, 111, 112, 113, 119, 120, 137, 166, 601, 602, 603, 604, 605, 606

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In areas exposed to particularly high stresses (dampness, scouring), additional safety precautions may however
be required.
The following measures are recommended depending on the application.
Protect repair area using:
Heat-shrinkable tube
Corrugated tube
Wrapping with fabric tape
Spaghetti insulation
BASIC KNOWLEDGE
MODEL SURVEY - GF00.10-P-0025-01I
MAJOR ASSEMBLY OVERVIEW - GF00.10-P-0025-02I
COMPLETE VEHICLE, MODEL/COMPONENT INSTALLATION SURVEY, BUILD CONDITION - GF00.10-P-0801I
MODEL 163
163.1163.11163.113ML 270 CDI
163.12163.128ML 400 CDI
163.13163.136ML 230
163.15163.154ML 320
163.157ML 350
163.17163.172ML 430
163.174ML 55 AMG
163.175ML 500
Sales
designationModelEngineManual
transmissionAutomatic
transmissionSteering gear
ML 270 CDI163.113612.963716.644722.661-
ML400CDI163.128628.963-722.666
722.673-
ML 230163.136111.977717.461722.660-
ML 320163.154112.942-722.662-
ML 350163.157112.970-722.674-
ML 430163.172113.942-722.663-
ML 55 AMG163.174113.981-722.666-
ML 500163.175113.965-722.666-

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Fig. 318: Identifying Active Service System (ASSYST) Display
ACTIVE SERVICE SYSTEM (ASSYST) INFLUENCING PARAMETERS - GF00.20-P-0003-05A
The values of various influencing parameters are required by ASSYST for calculating the demand-based service
interval, and these are included in the calculation of the service interval as weighting factors . There are two
versions within ASSYST, the difference being in the oil level sensors fitted:
The familiar oil level indicator switch (S43) is fitted to engines (104, 111, 119, 120, 602.982, 604, 605,
606). In view of the fact that this is a switch, it is only possible to detect if the oil level drops below the
minimum level.
The oil sensor (oil level/temperature/quality, B40) is used on more recent engines (e.g. 112, 113, 166,
611, 668). This sensor consists of 2 capacitor systems with the engine oil as an insulator. If the water
content of the oil or the oil level changes, there is a change in the capacitance of the "capacitor".
The capacitance is thus a measure for the oil level.
In addition, the oil sensor (oil level/temperature/quality, B40) contains a temperature sensor which
detects the temperature of the engine oil.
All the signals are processed in the electronics integrated in the sensor to form a PWM (pulse width
modulated) signal, and passed to the engine control module (N3).
In addition to the weighting factors, which depend on reallife driving conditions, quality factors are also used
for calculating the demand-based service interval (remaining distance and remaining time).
Survey of ASSYST influencing parameters
Weighting factors (dependant on reallife driving conditions):
Load torque
Engine speed
Oil level
Engine oil temperature
Oil correction factor (is used as comparative value for determining oil level)
Coolant temperature
These data are supplied by the injection system control module (N3) to the service microprocessor over
the CAN.
The data relating to oil level, engine oil temperature and oil correction factor are supplied by the oil
sensor (oil level/temperature/quality, B40) through the injection system control module (N3), and are
therefore only available on engines fitted with this sensor.
Quality factors (these are factory-set to base values and can be changed with the HHT, if operating
conditions of the vehicle so necessitate; they influence the start distance):

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Engine version factor (gasoline/diesel)
National factor (The kilometer or mileage is coded in accordance with the national version.)
Distance travelled :
ASSYST is supplied with the 4 wheel speeds from the traction systems control module (N47) over the
CAN for calculating the distance travelled.
Time
ASSYST is supplied with the time information from the clock integrated in the instrument cluster.
ACTIVE SERVICE SYSTEM (ASSYST) SURVEY MODEL/ENGINE/SENSOR/INSTRUMENT CLUSTER - GF00.20-P-0003-
06A
The table below (status: March 1999) lists the various vehicle models with the different engines and the
different oil level sensors.
In addition, the table also indicates whether an instrument cluster with multifunction display is fitted.
ModelEngineOil level sensorMultifunction display
with engine
129112, 113
103, 104, 119, 120Oil sensor (oil
level/temperature/quality, B40)
Oil level indicator switch S43-
140-
104, 119, 120, 606Oil sensor (oil
level/temperature/quality, B40)
Oil level indicator switch S43-
163112, 113, 612
111Oil sensor (oil
level/temperature/quality, B40)
Oil level indicator switch S43-
168166, 668
-Oil sensor (oil
level/temperature/quality, B40)
Oil level indicator switch S43-
170112
111Oil sensor (oil
level/temperature/quality, B40)
Oil level indicator switch S43-
202112, 113, 611
104, 111, 601, 604,
605Oil sensor (oil
level/temperature/quality, B40)
Oil level indicator switch S43-
208112, 113
111Oil sensor (oil
level/temperature/quality, B40)
Oil level indicator switch S43Engine 112 only and
Gulf States: engine 111
210112, 113, 611
104, 111, 602, 605,
606Oil sensor (oil
level/temperature/quality, B40)Engines 112,113 Gulf
States, , : on all
engines fitted; others:

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ACTIVE SERVICE SYSTEM (ASSY ST) FUNCTION - GF00.20-P-0003A
MODEL 129 with ENGINE 112, 113
MODEL 163 with ENGINE 112, 113, 612
MODEL 168 with ENGINE 166, 668
MODEL 202 with ENGINE 112, 113, 611
MODEL 208 with ENGINE 112, 113
MODEL 210 with ENGINE 112, 113, 611, 612, 613
General
The "Active service system (ASSYST)" draws the attent ion of the driver to a service which is due.
ASSYST is a demand-activated engine oil service system. In other words, in addition to the pure time and
distance criterion, various factors are taken into account for calculating the demand-oriented service intervals.
These are on the one hand quality factors which are c oded with the HHT, and on the other hand weighting
factors which take into account driving conditions and thus actual wear and tear.
Fig. 319: Identifying Text Panel And Tool Symbol
engines 602, 606 for
in addition engine 605 LA

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