2011 Mercedes SL-Class Owner's Manual - Page 186

184 Engine compartment ! Excess oil must be siphoned or drained off. It could cause damage to the engine and emission control system not covered by the Mercedes-Benz Limited Warranty. X cool down before removing the cap. The coolant expansion tank contains hot fluid and is under pressure. RUsing Screw filler cap : back on filler neck. For more information on engine oil, see the "Technical data" section (Y page 303) and (Y page 305). a rag, slowly open the cap approximately 1/2 turn counterclockwise to relieve excess pressure. If opened immediately, scalding hot fluid and steam will be blown out under pressure. not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts. RDo Operation Transmission fluid level The transmission fluid level does not need to be checked. If you notice transmission fluid loss or gearshifting malfunctions, have an authorized Mercedes-Benz Center check the transmission. Active Body Control (ABC) fluid level Regular fluid level check is not required. If you notice fluid leaks or malfunction messages in the multifunction display, have an authorized Mercedes-Benz Center check the ABC system. X Coolant level The engine coolant is a mixture of water and anticorrosion/antifreeze. When checking the coolant level, the vehicle must be parked on level ground, and the coolant temperature must be below 158‡ (70†). Using a rag, slowly open cap approximately 1/ turn counterclockwise to relieve excess 2 pressure. X Continue turning the cap counterclockwise and remove it. The coolant level is correct if the level Rfor cold coolant: is up to the upper mark on the bracing rib of coolant expansion tank : (translucent) (1.5 cm) higher G Warning! RUse Rfor warm coolant: is approximately 0.6 in X In order to avoid any potentially serious burns: extreme caution when opening the hood if there are any signs of steam or coolant leaking from the cooling system, or if the coolant temperature gauge indicates that the coolant is overheated. not remove the cap on the coolant expansion tank if the coolant temperature is above 158‡ (70†). Allow the engine to Add coolant as required. X Screw cap back on and tighten it. RDo ! SL 600 and SL 65 AMG: Only open the cap on the coolant expansion tank. Never open the cap between the two charge-air coolers. Otherwise, the engine could be damaged.