GF00.20-D-0003H Active Service System (ASSYST), Function
GF00.20-D-0003H Active Service System (ASSYST), Function
General information
The Active Service System (ASSYST), which is integrated in the instrument cluster (A1), draws the driver's attention to a due service and to the required Service A or B. The ASSYST system is a demand-based engine oil service system. In addition to the distance and time criteria, which are based on the respective engine data record (starting distance and time), the following factors are taken into consideration when calculating the demand-based service intervals:
- Quality factor of engine oil quality, which is determined via the instrument cluster
- Assessment factors, which take into consideration the driving conditions and therefore the actual wear
The engine data record for the respective engine is selected by the software calibration number (SCN) coding of the instrument cluster by means of Star Diagnosis. The engine data record is dependent on the following variants:
- Engine installed
- Axle ratio
- Extension of the maintenance interval
- Tonnage
- Country code
The ASSYST function consists of the following subfunctions:
- Starting distance and time
- Remaining distance and time
- Displaying service scope
- Resetting service scope
- Inadvertently triggered reset of service scope
- Engine oil monitoring
- Engine oil refill detection, with code (JW6) Maintenance computer (ASSYST)
- Instrument cluster replacement
Starting distance and time
The starting distance is stored in the engine data record for the respective engines below and can be influenced by selecting the engine oil quality:
- Engine 642, engine 646 or engine 651:
- 30,000 km, with quality factor of engine oil quality 229.31
- 40,000 km, with quality factor of engine oil quality 228.51
- Engine 271 or engine 272:
- 23,000 km, with quality factor of engine oil quality 229.3
- 30,000 km, with quality factor of engine oil quality 229.5
The starting time is also stored in the engine data record for the respective engines below and cannot be influenced:
- Engine 642, engine 646 or engine 651:
- 730 days
- Engine 271 or engine 272:
- 730 days
The start values serve as a basis for the next service interval.
Remaining distance and time
Based on the starting distance and time, the current remaining distance and time to the next service is determined as the service interval taking into consideration the driving conditions and an engine oil refill detection, with code (JW6) Maintenance computer (ASSYST), on the basis of a bonus and penalty principle.
The remaining distance and time incl. the bonus and penalty principle are described in greater detail in separate documents.
Displaying service scope
The service scope is displayed on the instrument cluster display (A1p1). The service scope is shown as remaining distance or remaining time together with the service symbol upon driver request or automatically when reaching a warning threshold.
The display of the service scope is described in greater detail in separate documents.
Resetting service scope
For vehicles except code (JK3) High-end instrument cluster with speedometer in km, the service scope in the instrument cluster is reset using the buttons in the instrument cluster or by means of Star Diagnosis.
For vehicles with code (JK3) High-end instrument cluster with speedometer in km, the service scope in the instrument cluster is reset using the buttons in the instrument cluster, the right multifunction steering wheel button group (S110) and the left multifunction steering wheel button group (S111) or by means of Star Diagnosis.
The service scope should not be reset using Star Diagnosis as this would delete the driving conditions.
The operation of the instrument cluster is described in greater detail in separate documents.
Inadvertently triggered reset of service scope
If a reset of the service scope has been triggered in the instrument cluster or using Star Diagnosis but no service has been carried out, this reset must be reversed immediately. A corresponding menu is available in STAR DIAGNOSIS for this purpose. An inadvertently selected setting of the engine oil type can also be altered via the instrument cluster.
The operation of the instrument cluster is described in greater detail in separate documents.
Engine oil monitoring
In the event of engine oil starvation or overfilling, information about the engine oil level is shown in the text fields on the instrument cluster display or indicator lamps in the instrument cluster are actuated. The oil can symbol also appears.
Engine oil monitoring is described in greater detail in separate documents.
Engine oil refill detection, with code (JW6) Maintenance computer (ASSYST)
In addition to engine oil monitoring, on vehicles with engine 642, with engine 646 or with engine 651 engine oil refills are also detected. When engine oil is replenished, a one-off bonus is issued following every detection of a refill; this bonus is added to the remaining distance and this may extend the service interval.
The size of the bonus varies and depends on the following factors:
- Amount of engine oil replenished
- Current engine oil quality
- Current driving conditions
As there is no fixed amount for an engine oil refill and as the current values for the engine oil quality and the driving conditions are used in the calculation, it is only possible to provide information about the value of the bonus by means of a characteristic curve.
Engine oil refill detection is described in greater detail in separate documents.
Instrument cluster replacement
If the instrument cluster has to be replaced, then the codings and data records must be transferred to the new instrument cluster.
