2006 Mercedes SL-Class Owner's Manual - Page 452

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 SL 500 SL 600 (main cooling system) SL 600 (low temperature cooling system) SL 55 AMG SL 65 AMG (main cooling system) Approx. freeze protection - 35°F (- 37°C) 6.1 US qt (5.8 l) 6.9 US qt (6.5 l) 1.2 US qt (1.1 l) 7.3 US qt (6.9 l) 8.2 US qt (7.75 l) - 49°F (- 45°C) 6.8 US qt (6.4 l) 7.5 US qt (7.1 l) 1.3 US qt (1.2 l) 7.9 US qt (7.5 l) 9.0 US qt (8.5 l) 1.7 US qt (1.6 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: Mercedes-Benz 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. SL 65 AMG (low temperature cooling system) 1.5 US qt (1.45 l) 451