The Mercedes coolant that i bought (in a white, 1 gallon container, with a mercedes logo on it) is orange / red. It says "Antifreeze / Anticorrosive".

I'd use only Mercedes approved coolant in my W124. It's available at the dealer or from Fastlane (via mail-order). It's not worth taking a risk with your expensive aluminum engine - get the recommended stuff.

Troy
1995 E420 79k