2003 Mercedes SLK-Class Owner's Manual - Page 177

Operation Engine compartment Add coolant as required. Turn the cap back, past the first detent position, as far as it will go. The coolant level is correct if the level for cold coolant: the level must reach marker 2 in the filler neck of the expansion tank. for warm coolant: is approx. 0.6 in (1.5 cm) higher Add coolant as required. Replace and tighten cap. SLK 320, SLK 32 AMG i The drain plugs for the cooling system are located on the right side of the engine block and at the bottom of the radiator. More information on coolant can be found in the "Technical data" section ( page 273). 1 Coolant expansion tank 2 Marker in the filler neck Using a rag, turn the cap slowly approximately one half turn to the left to release any excess pressure. Continue turning the cap to the left and remove it. i The drain plugs for the cooling system are located on the right side of the engine block and at the bottom of the radiator. More information on coolant can be found in the "Technical data" section ( page 273). 177