I read through this thread, then suddenly remembered why it's been so long since I bothered coming here.
To the original poster......
I too have used Wix filters for years. I don't not use them in my MB, but have done so in many domestic/asian cars. They are a quality filter and have been so for years. I think some people here try to lump all non-german filters into the "junk" category. Bosch is german, yet they have received less than high marks in numerous tests. Fram gets trashed, but I've taken 2 cars past 300,000 using that brand. Go figure.
Maybe I'll log back in 6 months or so to see if ya'll are still squabbling over oil, filters, and the dreaded green coolant.