Mercedes-Benz 2005 M-Class Operator's Manual page 320

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 ne-
cessitates that anticorrosion/antifreeze
coolant used in such engines be
specifically formulated to protect the
aluminum parts. (Failure to use such
Anticorrosion/antifreeze quantity
Model Approx. freeze protection
– 35°F (– 37°C)
ML 350, ML 500, 6.4 US qt (6.0 l)
318
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.
– 49°F (– 45°C)
7.0 US qt (6.6 l)
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
Light Truck Center for service.