2007 Mercedes CL-Class Owner's Manual - Page 693

Technical data Fuels, coolants, lubricants, etc. Anticorrosion/antifreeze Your vehicle contains a number of aluminum parts. The use of aluminum components in motor vehicle engines necessitates that anticorrosion/antifreeze coolant used in such engines be specifically formulated to protect the aluminum Anticorrosion/antifreeze quantity Model CL 550 CL 600 (main cooling system) CL 600 (low temperature cooling system) Approximate freeze protection -35°F (-37°C) 6.08 US qt. (5.75 l) 6.5 US qt. (6.15 l) 1.37 US qt. (1.3 l) -49°F (-45°C) 6.71 US qt. (6.35 l) 7.14 US qt. (6.76 l) 1.51 US qt. (1.43 l) parts. Failure to use such anticorrosion/ antifreeze coolant will result in a significantly shortened service life. Therefore, the following product is strongly recommended for use in your vehicle: MB 325.0 Anticorrosion/Antifreeze agent. Before the start of the winter season (or once a year in hot southern regions), you should have the anticorrosion/antifreeze concentration checked. The coolant is also regularly checked each time you bring your vehicle to an authorized Mercedes-Benz Center for service. 690