As the only major differences between "Ehe" und "Eingetragene Lebenspartnerschaft" are adoption rights and the name now, but the latter being of high symbolic value for the CDU it won't happen. In case of adoption right, the Constitutional Court will strike again, soon, on it's path to marriage equality (they have done it several times before).
As of now, Germany is the only Western European EU member state without SSM. But as I can't see the Union lose its dominant position anytime soon or doing a Tory on it (which will be impossible due to CSU pressure), it will stay like this for quite some time.
Austria and Italy don't have SSM as well.