According to the "Global Trading Quick Start Guide" literature that Etrade sent me after opening a Global Trading Account... They trade on six major global exchanges...
1. Canada - Toronto Stock Exchange TXS Vancouver Stock Exchange VSE
2. France Paris Stock Exchange PAR
3. Germany XETRA Stock Exchange EDE
4. Hong Kong Hong Kong Stock Exchange SEHK
5. Japan Osaka Stock Exchange OSE Tokyo Stock Exchange TSE
6. United Kingdom London Stock Exchange LSE
I also verified by email that the link below was the correct stock exchange in Germany that they trade on...