2007 Mercedes CLK-Class Owner's Manual - Page 475

Technical data Fuels, coolants, lubricants, etc. Engine oils Engine oils are specifically tested for their suitability in our engines and durability for our service intervals. Therefore, only use approved engine oils and oil filters required for vehicles with Maintenance System (U.S. vehicles) or FSS (Canada vehicles). For a listing of approved engine oils and oil filters, refer to the Factory Approved Service Products pamphlet, or contact an authorized Mercedes-Benz Center. Please follow Maintenance System (U.S. vehicles. Canada vehicles, depending on vehicle production date) or FSS (Canada vehicles, depending on vehicle production date) recommendations for scheduled oil changes. Failure to do so will result in engine or emission control system damage not covered by the Mercedes-Benz Limited Warranty. Air conditioning refrigerant R-134a (HFC) refrigerant and special PAG lubricating oil are used in the air conditioning system. Never use R-12 (CFC) or mineral-based lubricating oil. Otherwise damage to the system will occur. Engine oil additives Do not blend oil additives with engine oil. They may damage the engine. Damage or malfunctions resulting from blending oil additives are not covered by the Mercedes-Benz Limited Warranty. ! Using engine oils and oil filters of specification other than those expressly required for the Maintenance System (U.S. vehicles. Canada vehicles, depending on vehicle production date) or FSS (Canada vehicles, depending on vehicle production date), or changing of oil and oil filter at change intervals longer than those called for by the Maintenance System (U.S. vehicles. Canada vehicles, depending on vehicle production date) or FSS (Canada vehicles, depending on vehicle production date) will result in engine or emission control system damage not covered by the Mercedes-Benz Limited Warranty. 474