2003 Mercedes SL-Class Owner's Manual - Page 230

Operation Engine compartment Other display messages If there is excessive engine oil with the engine at normal operating temperature, the following message will appear: Engine oil level - Reduce oil level! If you see the message: Engine oil level - Not while engine on Oil level in the ABC system The oil level in the ABC system does not need to be checked. If there is visible oil loss or if malfunction messages appear in the display, have an authorized Mercedes-Benz Center check the ABC system. Coolant The engine coolant is a mixture of water and anticorrosion/antifreeze. To check the coolant level, the vehicle must be parked on level ground and the engine must be cool. The coolant expansion tank is located on the passenger side of the engine compartment. Have excess oil siphoned. If the key is not turned to position 2 in the starter switch: Engine oil level - Switch on ignition! Turn off the engine. If engine is at normal operating temperature, wait five minutes before checking oil. If the engine is not yet at normal operating temperature, you must wait 30 minutes before checking oil. More information on engine oil can be found in the "Technical data" section ( page 343). Transmission fluid level The transmission fluid level does not need to be checked. If you notice transmission fluid loss or gear shifting malfunctions, have an authorized Mercedes-Benz Center check the automatic transmission. Switch on the ignition. If you see the message: Observe waiting time Wait five minutes before repeating check procedure. 230