2007 Mercedes C-Class Owner's Manual - Page 311

Operation Maintenance We strongly recommend that you have your vehicle serviced by an authorized Mercedes-Benz Center, in accordance with the Maintenance Booklet at the times called for by the maintenance service indicator display. Failure to have the vehicle maintained in accordance with the Maintenance Booklet and maintenance service indicator at the designated times/mileage will result in vehicle damage not covered by the Mercedes-Benz Limited Warranty. Maintenance service indicator message The maintenance service indicator will notify you when your next maintenance service is due. Starting approximately 1 month before your next maintenance service is due, one of the following messages will appear in the multifunction display while you are driving or when you switch on the ignition (example service A): Service A in XXXXX miles (km) Service A in XXX Days Service A due now The type of maintenance service due is indicated in the multifunction display: 9 ½ Basic service (A) Extended service (B) 310