Let them figure it out themselves, all you can do is tell them what you know. I have pretty much left MBworld because of complete idiots that thought they knew everything. Their are certain people that know enough to do damage, and when you try to explain why say, atf is bad for the power steering or why K&N filters are a bad idea it is like talking to a brick wall. I am a member of 3 other MB forums, one Saturn, one Jag and one Genaral car forum. I find this forum to be the bast out of all the MB ones. Jaglovers has a lot of good people on it. The Saturn one has a few that really know their stuff, but after reading posts like: "their was no oil on my dipstick is that bad?" "I drove it 5k miles and didn't check the oil" I have yet to see one of these on MS.