Changed my coolant yesterday, using Rhino ramps to gain access under the car to drain the radiator. All went well. It seemed like pure antifreeze is what I drained out. Dark blue. I then filled with distilled water and ran that to rinse and got more blue mixture out. I found I had to turn the heater on hot to be sure the heater coils got rinsed out also. New orange/yellow MB coolant installed now.