What's up with the Blue Glass... I noticed it on some E & C class cars, but the dealer never mentioned it to me when I was buying my E class. I had an up close look at a C today in a parking lot that had it, and the markings said "Solextra" or something... not the usual Sigla or Sekurit (which I still don't know the difference between either...) so if anyone would care to enlighten me as to all these different glass types, I would be most grateful.
Thanks!