2008 Mercedes CLK-Class Owner's Manual - Page 365

Operation Maintenance We strongly recommend that you have your vehicle serviced at an authorized Mercedes-Benz Center, in accordance with the Maintenance Booklet at the times called for by the maintenance service indicator. Maintenance service indicator message The maintenance service indicator message will notify you when the next maintenance service is due. Starting approximately 1 month before the 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 Due In XXXXX Miles (Km) Service A Due In XXX Days Service A Due Now ! 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. The type of maintenance service due is indicated in the multifunction display: 9 ½ Basic service (A) Extended service (B) i The Maintenance System in your vehicle tracks distance driven and the time elapsed since the last maintenance service and calculates other maintenance service work required. 364