If you like chemistry, and want to know why the combination of Mercedes coolant (Zerex-G05) + Distilled water is best for your MB cars, you can read my posts in the 2 following threads:

http://www.peachparts.com/shopforum/showthread.php?threadid=85709&highlight=antifreeze

http://www.peachparts.com/shopforum/showthread.php?threadid=83661&highlight=antifreeze

Best regards,

Eric