Does anybody know what the E1 or E2 designations on glass means? I just had my windshield replaced last week and the replacement has a E2 designation that has a cricle around it like a symbol or something, now the rest of my car's glasses all have an E1... What does that designate? Does it has to do with quality, material type or lamination?

 

http://www.carwindshields.info/windshieldmarkings.htm

 

This is great information, I really appreciate it... I couldn't even get MB USA to clarify this me... Thank You!!!