It was stated many time (little bit a search would have give you the answer) It's because of the licensing with DTM owner. They can't put DTM14 content in R3E at this time. It will come sooner or later at it came for DTM13 cars. Maybe when DTM2015 will be release, or before (if DTM 2015 come one day as an experience) You'll have to wait, as any of us.
You're right.. it's almost impossible to see it. White text on black menu bar.. what a heresy ! They will... we only don't know when.