Mercedes-Benz ML320. Manual — part 553



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.

Model

Engine

Oil level sensor

Multifunction display

with engine

129

112, 113

103, 104, 119, 120

Oil sensor (oil

level/temperature/quality, B40)

Oil level indicator switch S43

-

140

-

104, 119, 120, 606

Oil sensor (oil

level/temperature/quality, B40)

Oil level indicator switch S43

-

163

112, 113, 612

111

Oil sensor (oil

level/temperature/quality, B40)

Oil level indicator switch S43

-

168

166, 668

-

Oil sensor (oil

level/temperature/quality, B40)

Oil level indicator switch S43

-

170

112
111

Oil sensor (oil

level/temperature/quality, B40)

Oil level indicator switch S43

-

202

112, 113, 611

104, 111, 601, 604,

605

Oil sensor (oil

level/temperature/quality, B40)

Oil level indicator switch S43

-

208

112, 113

111

Oil sensor (oil

level/temperature/quality, B40)

Oil level indicator switch S43

Engine 112 only

and

Gulf States: engine 111

210

112, 113, 611

104, 111, 602, 605,

606

Oil sensor (oil

level/temperature/quality, B40)

Engines 112,113 Gulf

States,

,

: on all

engines fitted; others:

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

me

ACTIVE SERVICE SYSTEM (ASSYST) 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 attention 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 coded 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

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

me

After a level has dropped below a warning threshold, the remaining distance or the remaining time is displayed
in text panel (b) and the tool symbol (a) appears in the display (top ill.). In addition, ASSYST features a low
engine oil level display. If the oil level is too low or too high, this appears in text panel (b) and the oil can
symbol (a) is displayed (bottom ill.).

(

The illustrations relate to models with multifunction display. For other models, refer to document:

"ASSYST display facilities".)

Service A/B display

All models will feature an automatic display of the service (A or B) by no later than modification year 00/1.
More detailed information is contained in the document displaying service.

Fig. 320: Identifying Service A/B Display

In view of the complexity of the system, ASSYST features its own processor in the instrument cluster.

ASSYST is supplied with the time information from the electronic clock integrated in the instrument cluster.

The other data required are supplied over the CAN dataline by the traction systems control module (N47) and
by the injection system control module (N3).

CAN data required for ASSYST:



wheel speed signals for calculating the vehicle speed and distance (from traction systems control module,
N47)



Coolant temperature (from injection system control module, N3)



Engine oil temperature (from injection system control module, N3)



Oil level (from injection system control module, N3)



Engine speed (from injection system control module, N3)



Load torque (from injection system control module, N3)



Oil correction factor (from injection system control module, N3)

Active service system (ASSYST)

GF00.20-P-0003-03A

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

me

ACTIVE SERVICE SYSTEM (ASSYST) FUNCTION DESCRIPTION CONTENTS - GF00.20-P-0997AZ

MODEL 129 as of 1.6.97

MODEL 140 as of 1.6.97

MODEL 163

MODEL 168

MODEL 170 as of 1.6.97

MODEL 202 as of 1.6.97

MODEL 208 up to 31.7.99

MODEL 210.081 /281 /025 /063 /065/225 /265 /663 up to 31.5.97

MODEL 210 as of 1.6.97 up to 30.6.99

block diagram

Active service system (ASSYST)
display facilities

GF00.20-P-0003-04A

Active service system (ASSYST)
influencing variables

GF00.20-P-0003-05A

Active service system (ASSYST)
survey of
model/engine/sensor/instrument
cluster

GF00.20-P-0003-06A

Remaining distance function

GF00.20-P-2007A

Remaining time function

GF00.20-P-2008A

Engine oil monitor function

GF00.20-P-2009A

Displaying service function

Model 129, 202 as of
8.99
Model 163 as of 1.00
Model 168 as of 9.99
Model 170 as of 12.99

GF00.20-P-2010B

Active service system (ASSYST)
function

Engines with oil sensor
(e.g. 112, 113, 611)

GF00.20-P-0003A

Model 210 as of
01.03.97 with engine
111, 602, 604, 605, 606
Model 129, 140, 170,
202 as of 06.97 except

GF00.20-P-0003B

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

me