Hello,
I had a detailed understanding of what you are looking for, though I'm working on Salesforce, I'm bit confident on Vtiger too.
Here is some features that Vtiger covers, like-
Supports GERMAN
Email integration and extensions
Mass mailing
Quoting, invoicing, sales orders, purchase orders
Installation on Mobile
Apart form these there are more features that are included and once we will get in communication we can sought more.
How about getting connected this PM?
Cheers,
Dany