2008 Mercedes CLK-Class Owner's Manual - Page 326

Operation Engine compartment Engine oil The amount of oil your engine needs will depend on a number of factors, including driving style. Higher oil consumption can occur when the vehicle is new the vehicle is driven frequently at higher engine speeds Engine oil consumption checks should only be made after the vehicle break-in period. Checking engine oil level When checking the oil level the vehicle must be parked on level ground. with the engine at operating temperature yet, the vehicle must have been stationary for at least 5 minutes with the engine turned off. with the engine not at operating temperature, the vehicle must have been stationary for at least 30 minutes with the engine turned off. CLK 350 / CLK 550 ! Do not use any special lubricant additives, as these may damage the drive assemblies. Using special additives not approved by Mercedes-Benz may cause damage not covered by the Mercedes-Benz Limited Warranty. More information on this subject is available at any Mercedes-Benz Center. 1 Oil dipstick 2 Upper (max) mark 3 Lower (min) mark 325