2003 Mercedes CLK-Class Owner's Manual - Page 256

Operation Engine compartment ! Excessive oil must be siphoned or drained off. It could cause damage to the engine and catalytic converter not covered by the Mercedes-Benz Limited Warranty. Screw the cap back on the filler neck. 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: Observe waiting time Wait five minutes before repeating check procedure. If you see the message: Engine oil level Not when engine on! More information on engine oil can be found in the "Technical data" ( page 353). 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. 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. 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. i If you want to interrupt the checking procedure, press the k or j button on the multifunction steering wheel. See "Practical hints" ( page 294) if the engine oil level indicator lights up in the display while the engine is running. Have excess oil siphoned. If the key is not turned to position 2 in the starter switch: Turn on ignition to see engine oil level! Switch on the ignition. 256