Hi Guys,
Well, here's what I'm planning instead.... yes it's the easier softer way.... I'm going to take it to an out of the way place that works on Mercedes and has a great reputation... so I'll ask them if they can:
1.Drain the radiator
2.Drain the intercooler


Then fill it up with 50/50 distilled water and famous liquid that I bought but is sitting across the room and I'm too lazy to go look at it again!


That way I'll be sure it's been done and I can start anew as they say....


Mine only has 15,000 miles on it too, so it probably doesn't even need it, but better safe than sorry.


Richard