Only Green antifreeze type is suitable and you’ll need 7.5 liters of it. Don’t underestimate the importance of Mercedes-Benz’s 3.0 engine cooling system. Otherwise CLS made in 2012 won’t serve you long enough. Only exact type of antifreeze will suit Mercedes-Benz CLS cooling system. It’s better to choose fluid in combination of 2013 year, 3.0 volume of motor and engine code of OM642.853.
It’s obvious that every OM642.853 motor needs good service as stated by Mercedes-Benz in instruction. 3.0 CLS motors of 2010 year will serve more by optimal service. There is a big plus in servicing 2006 Mercedes-Benz CLS with all regulations. If you choose other than Green coolant or use less than 8 liters, you can’t expect normal work.