Active service system (ASSYST) function - GF00.20-P-0003B

MODEL 129 as of 1.6.97 except engine 112/113 

MODEL 140 as of 1.6.97 

MODEL 170 as of 1.6.97 

MODEL 202 as of 1.6.97 except engine 112/113/611 

MODEL 208 up to 31.7.99 except engine 112/113 

MODEL 210 as of 1.3.97 up to 30.6.99 except engine 112/113/611 

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.

After a level has dropped below a warning threshold, the remaining distance or the remaining time and the tool symbol are displayed in the panel of the trip counter. 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. In the case of an instrument cluster with multifunction display, the remaining time or the remaining distance appear in text panel (b) and the tool symbol (a) in the display (see illustration: display appears on instrument cluster with multifunction display).

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.

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: 

• 4 wheel speed signals for calculating vehicle speed and distance (from traction systems control module, N47)
• Coolant temperature (from injection system control module, N3)
• Engine speed (from injection system control module, N3)
• Load torque (from injection system control module, N3)

	Active service system (ASSYST) block diagram		GF00.20-P-0003-03A
	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 (ASSYST) survey of model/engine/sensor/instrument cluster		GF00.20-P-0003-06A
	Displaying service function	Models 129, 202 as of 8.99 Model 170 as of 12.99	GF00.20-P-2010B
	Active service system (ASSYST) remaining distance function		GF00.20-P-2007A
	Active service system (ASSYST) remaining time function		GF00.20-P-2008A
	Active service system (ASSYST) engine oil monitor function		GF00.20-P-2009B
	Displaying service function	Models 129, 202 as of 8.99 Model 170 as of 12.99	GF00.20-P-2010B