[C320-list] Change coolant 200 hours on engine

[Dave Hupe]

 Dan-
You plan to shut off the engine and drain all the fresh water rinse as your final preparation step .... right?  You must do this so you can add the final correct mixture of antifreeze and water (usually 50/50 mix). You can't add straight antifreeze to an already full system of straight water.   I suggest use distilled water to finally mix with the antifreeze.
Sorry if this is already what you planned, but that wasn't clear. 
Dave Hupe
1994 C320 (#32)