Mercedes-Benz ML320. Manual — part 554

engine 112, 113, 611,
612
(Valid for engines with
oil level switch.)

Active service system (ASSYST)
operating information

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

GF00.20-P-0003-01A

Model 210 as of
01.03.97 with engine
111, 602, 604, 605, 606
Model 129, 140, 170,
202 as of 06.97 except
engine 112, 113, 611,
612
(Valid for engines with
oil level switch.)

GF00.20-P-0003-01B

Active service system (ASSYST)
block diagram

GF00.20-P-0003-03A

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

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

Engine oil monitor function

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

GF00.20-P-2009A

Model 210 as of
01.03.97 with engine
111, 602, 604, 605, 606
Model 129, 140, 170,
202 as of 06.97 except
engine 112, 113, 611,
612
(Valid for engines with
oil level switch.)

GF00.20-P-2009B

Instrument cluster (IC) function
description contents

GF54.30-P-0997AZ

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

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REMAINING DISTANCE FUNCTION - GF00.20-P-2007A

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 as of 1.3.97 up to 30.6.99

The service intervals which are possible with ASSYST range



on engines with oil sensor (e.g. 112, 113, 166, 611) between 15 000 and 30 000 km,



for the new direct injection diesel engine 668 between 20 000 and 40 000 km,



for engines with oil level switch between 15 000 and 22 500 km (for engine 602.982 between 20 000 and
30 000 km).

The service interval achieved depends on the start distance and the driving conditions (cf. remaining
distance).

Start distance and remaining distance

Start distance refers to the service interval in km/miles which is the minimum distance which may be driven
until the next service. On engines with oil sensor (e.g. 112, 113, 166, 611, 668) this applies only, however, if the
specified quantity of oil has been added during the oil change.

The start distance is dependent on:



the set quality factors

(The quality factors are factory-set to a basic setting. They can be altered with the HHT, if operating
conditions so necessitate.)

The start distance is not dependent on the driving conditions (weighting of the distance driven) and on any oil
replenishments .

The standard value is normally 15 000 km, for the new direct injection diesel engine 668 20 000 km.

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

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The figure may differ from this, however, depending on quality factors.

The start distance is automatically reset to its initial value by the oil change reset each time the oil is changed.
The start distance is an internal computed quantity and cannot be displayed in the instrument cluster. It is
possible to display the start distance with the HHT.

What is normally displayed in the instrument cluster is the remaining distance .

The remaining distance is the same as the start distance immediately after the oil change. On engines with oil
sensor (e.g. 112, 113, 166, 611, 668) this applies only, however, if the specified quantity of oil has been added
during the oil change.

The remaining distance is the distance which remains from the current kilometer reading until the next
service. The possible length of the interval is at least as great as the remaining distance displayed
immediately after an oil change, and is at the most twice the start distance.

The remaining distance is dependent on



the start distance



the driving conditions (a weighting of the distance driven takes place)



any oil replenishments in the case of engines with oil sensor (e.g. 112, 113, 166, 611, 668)

Consequently, ASSYST also takes into account the driving conditions: In the case of a favorable weighting
(e.g. small number of cold starts, no high engine revs, small number of short-distance trips, minimum extent of
towing a trailer etc.) and oil replenishments, the driver is provided with a bonus which extends the remaining
distance and thus the service interval. Account is also taken of whether the vehicle is actually driven or whether
the engine runs at idle speed. ASSYST is constantly supplied with the data regarding the current operating
conditions of the vehicle for this purpose.

In the case of the best weighting , only 0.6 km are added for each kilometer driven.

In the case of the most unfavorable weighting of the distance (e.g. frequent short-distance trips, large number
of cold starts), the remaining distance and thus the service interval is smaller than in the case of the most
favorable weighting (assuming identical quality factors).

In the case of the most unfavorable weighting, up to 3 km are added for each kilometer driven.

The start distance and the remaining distance are once again presented in the form of a graph in the diagram
opposite, taking the example of gasoline engines

Each time the oil is changed, the start and remaining distances are set to the initial value. In this case, the
normal value of 15 000 km is entered as the start distance (top bar) (shaded + dark section). The start distance
may differ from 15 000 km (e.g. 14 000 km; shaded section) if the quality factors do not correspond to the basic
setting. In the case of engines fitted with oil sensor (e.g. 112, 113, 166) the start distance may also be less than
15 000 km if the specified oil quantity was not added during the oil change. The remaining distance (bottom
bar) is always 15 000 km, however, immediately after an oil change. In addition, the service interval is
always at least 15 000 km .

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

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The total remaining distance and thus the service interval may be increased to not more than twice the start
distance, 30 000 km in this case (white section) as a result of corresponding bonuses (favorable weighting of
distances driven) and in the case of engines fitted with oil sensor (e.g. 112, 113, 166).

Fig. 321: Start And Remaining Distance Graph

However, a start distance of less than 15 000 km results in a reduction in the maximum attainable service
interval.

Refer also to the diagrams in the document "Engine oil monitoring".

Warning threshold (km)

With the HHT it is possible to set a warning threshold between 250 km and 8000 km for the remaining distance.

This warning threshold is set differently for 3 different distances driven. The system adjusts to the correct
annual distance driven by calculating the daily distance driven (refer to table):

Display of remaining distance (The readout is shown in kilometers or miles depending on the national code.):



at driver request



automatically, after 5 s start switch in position 2 or driving if the warning threshold is reached :

The warning symbol and the readout: "SERVICE IN . KM" appears for 10 s. (On models not fitted with
multifunction display, the service symbol appears together with the remaining distance in kilometers,
from mid July 97 "... km".)



automatically, after 5 s start switch in position 2 or driving if the remaining distance is exceeded :

In this case, the readout "KM . EXCEEDED" appears together with the service symbol for 30 s (up to
mid July 97 for 10 s). (On models not fitted with multifunction display, the service symbol appears
together with the remaining distance with a negative sign in kilometers as a flashing display, as of mid
July 97 "... km".)

As of approx. 06.97 a brief warning signal sounds in addition.

2004 Mercedes-Benz ML350

1998-2005 GENINFO Overall vehicle - 163 Chassis

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