Date registered: Aug 2002
Vehicle: '85 2.3-16 '99 C280 '11 GLK350
Location: Scottsdale, Arizona, USA
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In the US, Valvoline makes the coolant for MBUSA to their specifications. While not molecule for molecule the same as Zerex G-05, the two fluids meet the same G-05 standard for alloy motors.
The Zerex in the gold jug is substantially cheaper than the white jug from the dealer, but you'd be hard pressed to say that one is better than the other.