A few months ago I bought a gallon of Zerex G-05 coolant, which is approved for use in all Mercedes vehicles. This past weekend, when I planned to do a coolant change, I could not find the same product. Nearly everything on the shelf is the pre-mixed variety, except for some lesser brands which are not compatible with Mercedes. I went to four different auto parts stores, and found the same thing.
I've gone to Valvoline's (maker of Zerex) website and cannot find anything other that the G-05. All of their pre-mixed (50% coolant/50% water) products do not specifically say that they're approved for Mercedes.
The coolant capacity for my car is 9 litres; I already have a 1/2 gal of the Zerex, so I only need a gallon. Should I just go to the dealer and buy the Mercedes coolant, or does anyone know if any of these premixed brands will work?