waiting on the call back. All the MB coolant that I have ever used was not green. I just recently picked up this '81 300D and flushed and filled today. I was AMAZED at all the rust build up that came out when I flushed the radiator. I am in the process of cleaning it up over the next few days. This is what the inside of the upper radiator hose looked like
. The only thing that will go back in there when I get it cleaned up will ONLY be the MB stuff.
The green stuff came out and I'm pretty sure it has been on a pretty steady diet of the stuff. Use at your own risk
.