sensor MERCEDES-BENZ ML320 1997 Complete Repair Manual

Possible readouts are (text in parenthesis relates to models not fitted with multifunction display.):
"OIL LEVEL OKAY" ("o.k."),
1.0L, 1.5L, 2L,
"Overfilling" ("HI"),
"OBSERVE WAITING TIME" (clock symbol flashing and oil can symbol),
"DISPLAY OIL LEVEL" (clock and oil can symbols.)
If there is a fault at the oil sensor (oil level/temperature/quality, B40) the oil can symbol and the text "OIL
LEVEL SENSOR FAULTY" appears only 30 s after the fault has occurred.
(On models not fitted with multifunction display, the oil level warning lamp (A1e12) comes on accordingly.)
For diagnosis, read also the injection system control module (N3) with the HHT. (The instrument cluster (A1)
receives the sensor data through the CAN from the injection system control module (N3)).
Oil change
The ASSYST has to be reset each time the oil is changed. Resetting ASSYST also resets the remaining time and
the remaining distance. Resetting can be performed at the instrument cluster or using the HHT. The following
data are stored when the system is reset:
current kilometer reading rounded off to 100,
total oil replenishments in the last interval,
remaining distance,
remaining time,
product of the quality factors,
the data of the last 5 resettings in 5 data sets
These data can only be read with the HHT!
If the specified quantity of oil is not replenished when the oil is changed, the (internal) start distance is
reduced.
Detecting oil replenishments
With the HHT it is possible to retrieve the last 10 oil replenishments and the corresponding kilometer
readings of the current interval.
In the normal case, detection of an oil replenishment is displayed by the remaining distance in the
instrument cluster being extended
Oil replenishments are always only detected once the following conditions are met:
the replenished quantit
y is at least

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:47 PMPage 211 © 2006 Mitchell Repair Information Company, LLC.

In the charts overleaf, a number of examples of this are presented. The horizontal (x) axis represents the service
interval and the vertical (y) axis is the remaining distance in each case in km.
conditions are met:
the replenished quantity is at least 1 l
after replenishing the oil, the car must be driven a distance of at least 5 km under normal driving
conditions at an oil temperature of at least 60°C
There are instances, however, in which the readout of the remaining distance nevertheless appears implausible
after replenishing oil; according to the display, no bonus or only a small bonus has been issued. This is caused
by the fact that the remaining distance is always only displayed within a range from 15 000 km up to 30 000 km
(or 20 000 km up to 40 000 km in the case of engine 668), but internally the system calculates with the actual
values which may also be beyond this range. These internal values can only be displayed with the HHT.
horizontal (x) axis represents the service interval and the vertical (y) axis is the remaining distance in each case
in km.
The readout of ASSYST in the instrument cluster always moves within the light range.
The remaining distance calculated internally may also, however, be within the two dark ranges. These internal
values can only be displayed with the HHT.
All examples relate to gasoline engines fitted with an oil sensor.
Example 1 :
Sufficient oil was added during the oil change. This means that the starting distance is 15 000 km.
After 10 000 km oil is topped up under normal driving conditions (a). The bonus (B1) is issued and displayed.
What this means is that when the remaining distance is retrieved, a greater remaining distance is displayed.
(Provided the aforementioned conditions for detecting the oil replenishment are met.)
Oil is topped up again after a further 5 000 km (b). In this case also a bonus (B2) is issued and displayed.
If, after this, no further oil is topped up and the car continues to be driven in the same manner, a service interval
of about 24 000 km is thus achieved.
In this example, the curve moves at all points within the light range of the chart; consequently, all the oil
replenishments are displayed by increasing the remaining distance.

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:47 PMPage 212 © 2006 Mitchell Repair Information Company, LLC.

Fig. 325: Engine Oil Monitor Function - (4 Of 4)
DISPLAYING SERVICE, FUNCTION - GF00.20-P-2010B
MODEL 129 as of 1.8.99
MODEL 163 as of 1.1.00
MODEL 168 as of 1.9.99
MODEL 170 as of 1.12.99
Active service system survey
of display facilities GF00.20-P-0003-04A
Active service system
technology/ influencing
variables GF00.20-P-0003-05A
Active service system survey
model/engine/
sensor/instrument cluster GF00.20-P-0003-06A
Active service system
(ASSYST) operating
instructions, resetting GF00.20-P-0003-01A
Oil sensor
position/task/functionOil sensor position, task,
functionGF18.40-P-4111A

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:47 PMPage 215 © 2006 Mitchell Repair Information Company, LLC.

REMOVE CONTACTS FROM SENSOR SPADE- TYPE CONTACT PLUG - AR00.19-P-0120-01A
Fig. 408: Identifying Wiring Harness Repair Kit, Supplement Fo r Passenger Cars (220 589 04 99 00)
Fig. 409: Identifying Wiring Harness Repair Kit, Basic (000 589 13 99 00)
by soldering
Repair cable harness using
rapid connection
technology AR00.19-P-0100-06A
Protect repair area after
cable repairsHeat-shrinkable tubeAR00.19-P-0100-08A
Protect repair area after
cable repairsCorrugated tubeAR00.19-P-0100-08B
Protect repair area after
cable repairsFabric tapeAR00.19-P-0100-08C
Checking wiring harness AR54.18-P-0600-01A
Plugs and couplings as-
built configuration GF00.19-P-8000A
Female contacts and
contact pins, installation
survey, as-built
configuration GF00.19-P-7000A

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:49 PMPage 282 © 2006 Mitchell Repair Information Company, LLC.

Fig. 413: Unpinning Contact Pins From Plug (SLK Design 97)
Rocking the contact pin back and forth, thus maki ng use of the full housing tolerance, may help to
unpin the contact.
REMOVE CONTACTS FROM SENSOR LAMINATED CONTAC T PLUG - AR00.19-P-0120-01B
Fig. 414: Identifying New Passenger Vehicle Wiring Harness Repair Kit (220 589 04 99 00)

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:49 PMPage 284 © 2006 Mitchell Repair Information Company, LLC.

Rocking the contact pin back and forth, thus maki ng use of the full housing tolerance, may help to
unpin the contact.
REMOVE CONTACTS FROM SENSOR SPADE- TYPE CONTACT COUPLING - AR00.19-P-0120-02A
Fig. 421: Identifying Wiring Ha rness Repair Kit, Supplement Fo r Passenger Cars (220 589 04 99 00)
Fig. 422: Identifying Wiring Harness Repair Kit, Basic (000 589 13 99 00)

Fig. 423: Identifying Wiring Ha rness Repair Kit (220 589 02 99 00)


2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:49 PMPage 287 © 2006 Mitchell Repair Information Company, LLC.

Fig. 424: Identifying Blade Holder With Clamping Pliers (220 589 01 99 50)
Fig. 425: Identifying SLK 2.8 - 97 Blade (220 589 01 99 63)
Unpin female contacts from coupling (SLK Design 97)
1. Insert blade holder with clamping pliers and SLK 2.8 - 97 blade from front side into contact cavity
of coupling (4).
Both spring shackles on the female contact (7) are compressed and, simultaneously, the locking tab (5)
on the coupling (4) is lifted.
2. A slight tug on the corresponding cable will remove the female contact (7) from the coupling.
Fig. 426: Female Contacts From Coupling (SLK Design 97)

Rocking the female contact back and forth making use of the full housing tolerance may help to unpin
the contact.
REMOVE CONTACTS FROM SPADE-TYPE SENSOR CONTACT COUPLING - AR00.19-P-0120-02B

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:49 PMPage 288 © 2006 Mitchell Repair Information Company, LLC.

Fig. 537: Pushing Slider Out Of Last Detent - Shown On A 6-Pin SPT Coupling
Unpin female contacts from coupling (SPT)
1. Insert blade holder with clamping pliers with JPT/SPT blade or MCP 2.8/ Fl.2.8/JPT/SPT blade
from the front through the openings in contact cavity of coupling (1).
This step compresses the spring shackles (2) on the female contact.
2. A slight tug on the corresponding cable will remove the female contact (1) from the coupling.
Fig. 538: Unpinning Female Contacts From Coupling (SPT)

REMOVE CONTACTS FROM SPADE-TYPE SENSOR CONTACT COUPLING - AR00.19-P-0120-12A

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:50 PMPage 343 © 2006 Mitchell Repair Information Company, LLC.

Fig. 547: Female Contacts From Coupling (LSK)
REMOVE CONTACTS FROM SPADE-TYPE SENSOR CONTACT PLUG - AR00.19-P-0120-13A
Fig. 548: Identifying Wiring Harness Repair Kit, Supplement For Passenger Cars (220 589 04 99 00)

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:50 PMPage 347 © 2006 Mitchell Repair Information Company, LLC.

coupling
Remove contacts from
Micro Quadlock System
couplingMicro Quadlock System,
coupling variant 2AR00.19-P-0120-04B
Remove contacts from E
95 coupling AR00.19-P-0120-05A
Remove contacts from
Junior Power Timer
coupling AR00.19-P-0120-07A
Remove contacts from
Junior Power Timer plug AR00.19-P-0120-08A
Remove contacts from
sensor laminated contact
plugSpade-type sensor
contact plug
Design 97AR00.19-P-0120-01A
Remove contacts from
sensor laminated contact
couplingSpade-type sensor
contact coupling,
Design 97AR00.19-P-0120-02A
Remove contacts from
sensor laminated contact
plugSpade-type sensor
contact plug
Variant 2AR00.19-P-0120-01B
Remove contacts from
sensor laminated contact
couplingSpade-type sensor
contact coupling, variant
2AR00.19-P-0120-02B
Remove contacts from
standard power timer
coupling AR00.19-P-0120-10A
Remove contacts from
standard power timer plug AR00.19-P-0120-11A
Remove contacts from
FIN sensor contact plug AR00.19-P-0120-13A
Remove contacts from
FIN sensor contact
coupling AR00.19-P-0120-12A
Remove contacts from
maxi power timer
coupling AR00.19-P-0120-14A
Remove contacts from
round plug contact 2.5-
plugRound plug contact 2.5
variant 1AR00.19-P-0120-16A
Remove contacts from
round plug contact 2.5-
couplingRound plug contact 2.5,
variant 1AR00.19-P-0120-15A
Remove contacts from 2.5
solder contact plug round
plug contact AR00.19-P-0120-18A

2004 Mercedes-Benz ML350
1998-2005 GENINFO Overall vehicle - 163 Chassis
me
Saturday, October 02, 2010 3:47:51 PMPage 393 © 2006 Mitchell Repair Information Company, LLC.