Mercedes-Benz GL-Class 2007 Owners Manual - Manual (Page 567)

566
Technical data
Fuels, coolants, lubricants
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 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
Light Truck Center for service.
Anticorrosion/antifreeze quantity
Approximate freeze protection
Model -35°F (-37°C) -49°F (-45°C)
GL 320 CDI 5.0 US qt (4.75 l) 5.5 US qt (5.2 l)
GL 450 5.3 US qt (5.0 l) 5.8 US qt (5.5 l)