What does E2 mean in display window? - In Office Equipment & Supplies

The "E" means that the glass has been approved for road use in Europe on European member licensed automobiles by the Economic Committee of Europe (ECE). The number next to the "E" indicates the country which approved the item.

The numbers are as follows:
1 - Germany;
2 - France;
3 - Italy;
4 - Netherlands;
5 - Sweden;
6 - Belgium;
7 - Hungary;
8 - Czech Republic;
9 - Spain;
10 - Yugoslavia;
11 - United Kingdom;
12 - Austria;
13 - Luxembourg;
14 - Switzerland;
15 - (vacant);
16 - Norway;
17 - Finland;
18 - Denmark;
19- Romania;
20 - Poland;
21 - Portugal;
22 - Russian Federation;
23 - Greece;
24 - (vacant);
25 - (vacant); and
26 - Slovenia.