2004 Mercedes C-Class Owner's Manual - Page 266

Operation Maintenance The Mercedes-Benz Center will reset the service indicator following a completed service. Calling up the service indicator Switch on ignition. The standard display of the control system appears ( page 113). Press button k or j on the multifunction steering wheel until the FSS indicator appears in the multifunction display. Resetting the service indicator In the event that the service on your vehicle is not carried out by an authorized Mercedes-Benz Center, you can reset the service indicator yourself. Switch on ignition. The standard display of the control system appears ( page 113). Press button k or j on the multifunction steering wheel until the FSS indicator appears in the multifunction display. Press reset button for about three seconds. This message appears in the multifunction display: SERVICE INTERVAL? RESET WITH R BUTTON FOR 3 SEC. i If the service indicator was inadvertently reset, have a Mercedes-Benz Center correct it. Only reset if the proper service has been performed. Resetting the system without performing proper service as called for by the FSS will cause the FSS to incorrectly determine the next service interval which will result in engine damage not covered by the Mercedes-Benz Limited Warranty. i If the battery is disconnected, the days of disconnection will not be included in the count shown by the service indicator. To arrive at the true service deadline, you will need to subtract these days from the days shown in the service indicator. Do not confuse the service indicator with the engine oil level indicator :. To confirm, press reset button until you hear a signal. The service indicator now displays the reset interval. 266