General Information

The MERCEDES-BENZ Flexible Service System (FSS) (Also known as the Active Service System [ASSYST]) permits a flexible service schedule which is directly based on your customer's driving style. The next service due is displayed in the multifunction display within the instrument cluster. This display indicates the days or distances remaining to the next suggested maintenance. Once the suggested service due has been exceeded, the wrench symbol, plus the message "EXCEEDED BY" will appear, when the ignition key is in position 2.

A detailed list of the applicable maintenance jobs is contained in the customers service booklet or the service sheet. Each model has a separate service sheet, which exactly defines the service required for that mileage and/or time limit.

Each service sheet lists two service groups: Service "A" (small), and Service "B" (extended). Normally, the driving distance between a "A" service and a "B" service is approx. 14,000 miles, as a result the "A" service and "B" service alternate. The exception being if the FSS calculates an oil change interval of more then 14,000 miles, then a "B" service would indeed be followed by a "B" service.

Additionally, any service required that is not only mileage dependent is listed in the service sheets as: "Additional work".

Fluid levels:
Fluid levels are checked by a visual inspection of the exterior of the components (automatic transmission, transfer case, front and rear axles) for oil leaks. Since these components do not consume oil such as an engine, the oil loss can only be to the exterior of the component. If leaks are present, the cause of the leak must be determined and repaired, and invoiced under a separate repair order.