Displaying Service, Function

Display of service to be performed
In addition to the various service displays, the service work to be performed (A or B) also appears.

The service symbol (wrench) appears once or twice in the display for this purpose.

The service symbol appears
- once for service A
- twice for service B.


NOTE: A service A is always followed by a service B.


Following a service B, the next service must be calculated taking into account the kilometer readings. If the distance of the current service interval is less than 22 000 km, the next service is service A, otherwise service B.

This calculation is now performed automatically in the instrument cluster (A1).

The path of the service displayed A or B can be processed in the service sheet without the need for a calculation.


NOTE: There is no external difference in the instrument clusters with and without the service display.


If service A (one service symbol) is displayed, it is then necessary to ensure by means of the production date or the control unit identifier, that the vehicle in question is in fact a vehicle with service display. If this is not the case, the service must be determined as specified in the service sheet.

The table below shows from which control unit identifier the instrument cluster features the service display:

Model Control unit identifier
129 2/04
163 3/04
168 3/20
170 2/23
202 0/20

The control unit identifier can be read with the HHT under menu point "Control unit version".