I was checking things on my car, and saw that my antifreeze is dark green, like the propylene glycol stuff you expect to see in a Chevy truck. My other cars are Mercedes for which we use Zerex G-05, which is peach colored. The Zerex has all the anti-corrosion features requires for most European cars. What antifreeze is appropriate for a 2004 4200 Coupe? If the fluid in mine is the wrong formula, I want it changed Immediately!! Many Thanks