2004 Mercedes SLK-Class Owner's Manual - Page 389

Technical data Fuels, coolants, lubricants, etc. Engine oils Engine oils are specifically tested for their suitability in our engines. Therefore, use only engine oils approved by Mercedes-Benz. Information on approved products is available in the Factory Approved Service Products pamphlet, or at an authorized Mercedes-Benz Center. ! Always check the oil filler cap ( page 257) for important information pertaining to the engine oil needing to meet a specific Mercedes-Benz specification (e.g. MB 229.5). If such information is printed on the oil filler cap, only use an engine oil from the list of approved engine oils in the Factory Approved Service Products pamphlet that meets the specification indicated on the oil filler cap. Using engine oils of other specification may cause the FSS to incorrectly determine the next service interval and will result in engine damage not covered by the Mercedes-Benz Limited Warranty Please follow FSS recommendations for scheduled oil changes. Failure to do so could result in engine damage not covered by the Mercedes-Benz Limited Warranty. 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. Air conditioner refrigerant R-134a (HFC) refrigerant and special PAG lubricating oil are used in the air conditioner system. Never use R-12 (CFC) or mineral-based lubricating oil. Otherwise damage to the system will occur. 388