It depends... we are talking about germany. There is a rule and a law for everything.
The easy way: your school diploma will be accepted as Hochschulzugangsberechtigung (allowance to visit University): everything is fine, you can register at an university of your choice.
If your school diploma will not be accepted: yes, there is a way to study. With your completed apprenticeship and several years of work experience you can start your specialized studies. You may study IT, but no other subjects. These rules depends by laws of the federal state in germany, bavaria e.g. has other rules than lower saxony.
http://www.studieren-ohne-abitur.de/web here you can find more relevant informations in german language.