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 1: Identifying Text Panel And Tool Symbol

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

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 2: Identifying Service A/B Display

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

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) 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
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