Mercedes-Benz ML320. Service manual - part 401

 

  Index      Mercedes     Mercedes-Benz ML320 - service and repair manual 1997-2005 year

 

Search            copyright infringement  

 

 

 

 

 

 

 



 

 

Content   ..  399  400  401  402   ..

 

 

Mercedes-Benz ML320. Service manual - part 401

 

 

AR61.20-P-1105GH

Remove/install bottom engine compartment paneling

22.6.00

MODEL 

163.172 with ENGINE 113.942

MODEL 

163.174 with ENGINE 113.981

MODEL 

163.175 with ENGINE 113.965

P61.20-2017-12

1

Engine compartment paneling

2

Grub screw

3

Plastic clips

  

Remove/Install

1

Remove grub screws (2) of plastic clips (3)

 6 grub screws pins.

 

Installation: Check grub screws, replace 

if necessary.

2

Pull out plastic clips (3)

 

Installation: Check plastic clips, replace 

if necessary.

3

Remove engine compartment panel (1)

 

Installation: Ensure that engine 

compartment panel is positioned correctly.

4

Install in the reverse order

Copyright DaimlerChrysler AG  12.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 1

GF00.20-P-2009A

Engine oil monitor function

24.10.96

MODEL 

129 with ENGINE 112, 113

MODEL 

163 with ENGINE 112, 113, 612

MODEL 

168 with ENGINE 166, 668

MODEL 

202 with ENGINE 112, 611

MODEL 

208 up to 31.7.99 with ENGINE 112, 113

MODEL 

210 up to 30.6.99 with ENGINE 112, 113, 611

General
The oil level is constantly monitored by the oil sensor, and the 
appropriate data transmitted to the processor by the ASSYST.
Oil replenishments are detected automatically and result in a bonus, 
which extends the service interval accordingly.
An excess oil level or insufficient oil level appears in the display 
together with the oil can symbol.

Display of low oil level at maximum:
D

at driver request

Display of warnings:
D

automatically, at the earliest 60 s after engine start and oil 

temperature greater than 60°C: 

D if oil level too high: the oil can symbol appears together 
with the readout "OIL LEVEL ABOVE MAX". In addition, a 
brief warning signal sounds. (On models not fitted with 
multifunction displaly, "HI" appears flashing.)

D

if oil level too low: the oil can symbol appears together with 

the readout "OIL LEVEL BELOW MIN". In addition, a brief 
warning signal sounds. (On models not fitted with multifunction 
display, the oil level warning lamp (A1e12) comes on and the 
readout "-2L" appears flashing.)

-----------------------------------------------------------------------------------------

D

if oil at minimum: the oil can symbol appears together with 

the readout "OIL LEVEL MINIMUM". In addition, a brief 
warning signal sounds. (On models not fitted with multifunction 
display, the oil level warning lamp (A1e12) comes on.)

D

automatically 13 s after ignition ON:

D if no oil is in engine: the oil can symbol appears together 
with the readout "OIL LEVEL BELOW MIN". In addition, a 
warning signal sounds. (On models not fitted with multifunction 
display, the oil level warning lamp (A1e12) comes on and the 
readout "-2L"appears flashing. In addition a brief warning 
signal sounds.)

The missing oil quantity displayed no longer changes during the 
display. In other words, any change in oil level cannot be observed 
directly at the display. The new oil level is only displayed once the 
conditions described below exist.

Display of oil quantity at driver request
The text "DISPLAY OIL LEVEL?" appears 10 s after the start switch 
has been turned into position "2" (on models not fitted with 
multifunction display, the oil can and the clock symbol are displayed). 
If the reset button of the trip counter is pressed twice within one sec. 
during this readout, for example, "add 1.0L oil" (or "-1.0L") 
-----------------------------------------------------------------------------------------

appears in the display if oil level too low. The readout appears only 
after the elapse of a waiting time after engine OFF. The waiting time 
depends on the engine oil temperature.
It is 

up to 20°C

30 minutes

from 60°C

1 minute

The waiting time is between these two limits at other engine oil 
temperatures.

Possible readouts are (text in parenthesis relates to models not fitted 
with multifunction display.): 
D

"OIL LEVEL OKAY" ("o.k."),

D

1.0L, 1.5L, 2L, 

D

"Overfilling" ("HI"),

D

"OBSERVE WAITING TIME" (clock symbol flashing and oil can 
symbol),

D

"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:
D

current kilometer reading rounded off to 100,

D

total oil replenishments in the last interval,

D

remaining distance,

D

remaining time,

D

product of the quality factors,

D

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
D

With the HHT it is possible to retrieve the last 10 oil 
replenishments and the corresponding kilometer readings of 
the current interval.

D

In the normal case, detection of an oil replenishment is 
displayed by the remaining distance in the instrument cluster 
being extended

-----------------------------------------------------------------------------------------

Copyright DaimlerChrysler AG  05.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 1

Oil replenishments are always only detected once the following 
conditions are met:
D

the replenished quantity is at least 1 l

D

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.

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.
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.

P00.20-0201-06

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.

P00.20-0204-06

Example 2:
The specified quantity of oil was added when 
the oil was changed.
The car is driven under very favorable 
conditions and oil is topped up after 
10 000 km (a). Internally, the bonus B1 is 
issued, the service interval is extended 
accordingly by enlarging the remaining 
distance. However, as the curve is sometimes 
within the shaded area, only the part of B1 
which is within the light area, is at first 
displayed as an extension of the remaining 
distance. (Provided the aforementioned 
conditions for detecting oil replenishment are 
met.)

Oil is topped up once again at 18 000 km (b). 
In view of the fact that the maximum service 
interval of 30 000 km was exceeded, the 
bonus B2 is not initially displayed as an 
extension. The entire service interval in this 
case is 30 000 km.
If, from point b, the car continues to be driven 
under less favorable conditions, it may still 
also be possible now to achieve the maximum 
service interval of 30 000 km because of the 
internal bonus B2.

Copyright DaimlerChrysler AG  05.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 2

P00.20-0202-06

Example 3:
When the oil was changed, the quantity 
added was less than the specified quantity. 
Consequently, the start distance is less than 
15 000 km.
If oil is now topped up after 5 000 km (a), the 
remaining distance displayed is not extended 
as the curve is within the shaded area. The 
bonus B1 is nevertheless added internally 
and results in an extension of the service 
interval to slightly more than 
15 000 km - provided the driving conditions 
remain the same or are more favorable.

(The service interval of 15 000 km is always 
reached, however, even if the internal value 
were less.)

P00.20-0203-06

Example 4:
Oil has been topped up after 5 000 km under 
unfavorable driving conditions (a) and the oil 
replenishment (bonus B1) detected internally.
We now have two cases to consider:

D

If the car continues to be driven under 
the same conditions (unbroken line), the 
remaining distance displayed is not 
extended as the curve is within the 
shaded area.
The service interval in this case is 
nevertheless 15 000 km although the 
internal value is less. (The remaining 
distance displayed can always only be 
within the light area.)

D

If the car continues to be operated 
under more favorable conditions 
(broken line), the value of the internal 
remaining distance slowly moves into 
the light area. Consequently, the service 
interval may be greater than 
15 000 km. 

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/function

Oil sensor position, task, function

GF18.40-P-4111A

Copyright DaimlerChrysler AG  05.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 3

 

 

 

 

 

 

 

Content   ..  399  400  401  402   ..