OK Don wrote: > I use one of the Prestone flushing kits in the heater water line, but > I don't know that it does what the MB specified part does. I also > don't know that it doesn't --
It seems like that would flush the engine block and heater core, but not the radiator, unless you removed the thermostat. Maybe there's something I'm missing. I haven't done a flush on my Mercedes yet -- and when I do, I'll have to take it somewhere to have it done, because I don't have anywhere to do messy jobs like that anymore. But when I did one on my old VW, I didn't have any special tools, so I simply filled, warmed up, and drained the system repeatedly. It took about four complete fill/drain cycles before the water stopped looking greenish.
